Official Paper

RRB ALP CBT-II (Electronic Mechanic) Official Paper (Held On: 06 May, 2025 Shift 1) (Previous Year Paper)

175 questions · 150 minutes · with answers · free

Attempt as Timed Mock Test

Part A (100 questions)

1

In this question, a statement is given followed by two courses of action, numbered I and II. You must assume everything in the statement to be true, and on the basis of the information given in the statement, decide which of the given courses of action logically follow(s) for pursuing.

Statement:

A major fire broke out this afternoon in a mall in Jaipur, causing several casualties amongst the people present inside.

Courses of Action:

The police must check to see if the fire safety regulations were followed by the mall.

Traffic police must divert traffic away from the fire site, to enable evacuation of people.

  1. ((a))

    Only II follows.

  2. ((b))

    Neither I nor II follows.

  3. ((c))

    Both I and II follow.

  4. ((d))

    Only I follows.

Show Answer
Answer: ((a))

Only II follows.

2

The taxi charges in a city consist of a fixed charge together with the charge per kilometre for the distance covered. For a distance of 35 km, the charge paid is ₹375 and for a distance of 48 km, the charge paid is ₹427. Find the fixed charges and the charge per km (in ₹), respectively.

  1. ((a))

    220 and 6

  2. ((b))

    227 and 5

  3. ((c))

    235 and 4

  4. ((d))

    275 and 3

Show Answer
Answer: ((a))

220 and 6

3

Which technology operates through an electrochemical process that transforms the energy stored in hydrogen gas (H2) and oxygen into electrical power without combustion?

  1. ((a))

    Hydroelectric power

  2. ((b))

    Solar thermal power

  3. ((c))

    Hydrogen fuel cells

  4. ((d))

    Wind power

Show Answer
Answer: ((a))

Hydroelectric power

4

Seema is twice as old as Alka. If nine years is subtracted from Alka’s age and six years is added to Seema’s age, then Seema will be four times Alka’s age. How old was Alka three years ago? 

  1. ((a))

    18 years

  2. ((b))

    21 years

  3. ((c))

    16 years

  4. ((d))

    20 years

Show Answer
Answer: ((a))

18 years

5

Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusion(s) logically follow(s) from the statements.

Statements:

Some ships are boats.

All boats are submarines.

Some submarines are yachts

Conclusions:

(I) Some yachts are boats.

(II) Some yachts are ships.

  1. ((a))

    Only conclusion (I) follows. 

  2. ((b))

    Both conclusions (I) and (II) follow.

  3. ((c))

    Only conclusion (II) follows.

  4. ((d))

    Neither conclusion (I) nor (II) follows.

Show Answer
Answer: ((a))

Only conclusion (I) follows. 

6

Eight people are sitting in two parallel rows containing 4 people each in such a way that there is equal distance between adjacent persons. In row 1 – A, B, C and D are seated and all of them are facing south. In row 2 – P, Q, R and S are seated and all of them are facing north. Thus each person faces another person from the other row. Only three people sit to the right of R. D faces the person who is the immediate neighbour of S and P. C faces the person who sits second to the left of S. R does not face A.

Who amongst the following faces B?

  1. ((a))

    R

  2. ((b))

    S

  3. ((c))

    P

  4. ((d))

    Q

Show Answer
Answer: ((a))

R

7

In Engineering Drawing, which of the following is the correct definition of the term 'dimension'. 

  1. ((a))

    The thickness of the line of a letter

  2. ((b))

    A continuous thick or wide line along which the prints are trimmed

  3. ((c))

    A line that is drawn to make a section evident

  4. ((d))

    A numerical value expressed in an appropriate unit of measurement 

Show Answer
Answer: ((a))

The thickness of the line of a letter

8

In a certain code language, ‘LOVE’ is coded as ‘8364’ and ‘EARS’ is coded as ‘3517’. What is the code for ‘E’ in the given code language?

  1. ((a))

    7

  2. ((b))

    5

  3. ((c))

    3

  4. ((d))

    4

Show Answer
Answer: ((a))

7

9

Study the given pie chart and answer the question that follows.

The given pie chart indicates the percentage-wise breakup of students in different subjects. The total number of students in the college is 5000.

What is the ratio of the students studying Zoology to the students studying Botany?

  1. ((a))

    15 : 14 

  2. ((b))

    15 : 16

  3. ((c))

    14 : 15

  4. ((d))

    16 : 15

Show Answer
Answer: ((a))

15 : 14 

10

Which of the following steps is essential when configuring a web browser to enhance both security and privacy for a user?

  1. ((a))

    Enabling pop-ups for all websites to improve user experience

  2. ((b))

    Setting the homepage to a frequently visited website for quick access

  3. ((c))

    Configuring the browser to block third-party cookies and enabling HTTPS-only mode

  4. ((d))

    Disabling the browser's cache to improve website loading times 

Show Answer
Answer: ((a))

Enabling pop-ups for all websites to improve user experience

11

Which of the following benefits can be obtained by conducting an energy audit in a commercial building?

  1. ((a))

    Increasing the cost of energy bills

  2. ((b))

    Identification of opportunities for energy savings

  3. ((c))

    Reduction in price of energy per its unit usage

  4. ((d))

    Reduced market value of building

Show Answer
Answer: ((a))

Increasing the cost of energy bills

12

What should come in place of the question mark (?) in the given series?

17 29 41 59 77 101 125 ?

  1. ((a))

    175

  2. ((b))

    161

  3. ((c))

    155

  4. ((d))

    149 

Show Answer
Answer: ((a))

175

13

Which of the following options is correct when two objects at the same temperature are kept in contact with each other? 

  1. ((a))

    Both objects transfer heat to each other.

  2. ((b))

    Heat is transferred from object 2 to object 1.

  3. ((c))

    No heat is transferred.

  4. ((d))

    Heat is transferred from object 1 to object 2. 

Show Answer
Answer: ((a))

Both objects transfer heat to each other.

14

What will come in place of the question mark (?) in the following equation, if ‘+’ and ‘−’ are interchanged and ‘×’ and ‘÷’ are interchanged?

32 + 28 ÷ 3 × 4 − 15 = ?

  1. ((a))

    32

  2. ((b))

    26

  3. ((c))

    29

  4. ((d))

    20

Show Answer
Answer: ((a))

32

15

Mangal starts from Point A and walks 14 m towards north. He takes a right turn, walks 9 m and then takes a right turn, walks 37 m, reaches Point B and stops. Jayanti starts from Point Z which is 15 m towards the east of Point B. She walks 11 m towards east, takes a left turn, walks 42 m, turns left and walks 63 m, turns left and walks 19 m and stops at Point Y. What is the shortest distance between Point A and Point Y? (All turns are 90 degree turns only.) 

  1. ((a))

    25 m

  2. ((b))

    28 m

  3. ((c))

    26 m

  4. ((d))

    31 m

Show Answer
Answer: ((a))

25 m

16

What is the amount of work done in moving a charge of 6 C from a point with a potential of 120 V to a point with a potential of 140 V? 

  1. ((a))

    840 J

  2. ((b))

    120 J

  3. ((c))

    720 J

  4. ((d))

    3.33 J

Show Answer
Answer: ((a))

840 J

17

In a clearance sale of electronic items, an item whose marked price was ₹12,225 is now sold for ₹10,758, d% is the discount percentage on the item. The value of d is: 

  1. ((a))

    11%

  2. ((b))

    14%

  3. ((c))

    12%

  4. ((d))

    13%

Show Answer
Answer: ((a))

11%

18

Which of the following is NOT a fundamental quantity in the SI system? 

  1. ((a))

    Luminous intensity

  2. ((b))

    Amount of substance

  3. ((c))

    Time

  4. ((d))

    Force

Show Answer
Answer: ((a))

Luminous intensity

19

Alloys are preferred over pure metals in electrical heating devices: 

  1. ((a))

    because the resistivity of an alloy is generally higher than its constituent metals.

  2. ((b))

    because alloys oxidise (burn) readily at high temperatures.

  3. ((c))

    because the elasticity of an alloy is higher than that of its constituent metals.

  4. ((d))

    because the resistivity of an alloy is lower than that of its constituent metals.

Show Answer
Answer: ((a))

because the resistivity of an alloy is generally higher than its constituent metals.

20

Which of the following correctly describes the direction of electric current? 

  1. ((a))

    From low potential to high potential

  2. ((b))

    Opposite to the direction of positive charge flow

  3. ((c))

    Same as the direction of electron flow

  4. ((d))

    Opposite to the direction of electron flow

Show Answer
Answer: ((a))

From low potential to high potential

21

Which of the following is an application of the 5S concept in a workshop?

  1. ((a))

    Increasing the number of safety supervisors

  2. ((b))

    Keeping tools and materials organised for easy access

  3. ((c))

    Removing safety protocols to improve efficiency

  4. ((d))

    Using extra tools without proper storage

Show Answer
Answer: ((a))

Increasing the number of safety supervisors

22

Find the value of 96.86572 × 107.

  1. ((a))

    96,86,57,200

  2. ((b))

    0.9686572

  3. ((c))

    96,86,572

  4. ((d))

    9,68,65,720

Show Answer
Answer: ((a))

96,86,57,200

23

Ampere is the SI unit of ________. 

  1. ((a))

    electric current

  2. ((b))

    electric power

  3. ((c))

    electric charge

  4. ((d))

    mass

Show Answer
Answer: ((a))

electric current

24

If a = 21 and b = 19 , find the value of a2+b2+aba3−b3\mathrm{\frac{a ^ 2 + b ^ 2 + ab}{a ^ 3 - b ^ 3}}.

  1. ((a))

    35\frac{3}{5}

  2. ((b))

    23\frac{2}{3}

  3. ((c))

    25\frac{2}{5}

  4. ((d))

    12\frac{1}{2}

Show Answer
Answer: ((a))

35\frac{3}{5}

25

What is the immediate action to take when a fire breaks out in a workplace?

  1. ((a))

    Ignore the fire and continue working

  2. ((b))

    Try to put it out using water without knowing the fire type

  3. ((c))

    Gather near the fire to observe the situation

  4. ((d))

    Raise the alarm and evacuate the area

Show Answer
Answer: ((a))

Ignore the fire and continue working

26

The floor of a rectangular hall is a square with a perimeter of 220 m. If the cost of painting the four walls at the rate of ₹10 per m2 is ₹11,000, then find the volume of the hall.

  1. ((a))

    15,125 m3

  2. ((b))

    19,200 m3

  3. ((c))

    19,520 m3

  4. ((d))

    18,250 m3

Show Answer
Answer: ((a))

15,125 m3

27

The list price of an article is ₹5,000 and a discount of 70% is offered on the list price. What additional discount per cent on the already discounted price must be offered to a customer to bring the net selling price to ₹1,275?

  1. ((a))

    10%

  2. ((b))

    16%

  3. ((c))

    18%

  4. ((d))

    15%

Show Answer
Answer: ((a))

10%

28

Each of I, J, K, L, U, V and W has an exam on a different day of a week starting from Monday and ending on Sunday of the same week.J has the exam on Friday. Only two people have the exam between V and J. Only four people have the exam between L and V. U has the exam immediately after W. K does not have the exam on Monday.How many people have the exam before K and after I?

  1. ((a))

    Three

  2. ((b))

    Four

  3. ((c))

    One

  4. ((d))

    Two

Show Answer
Answer: ((a))

Three

29

The median of the data 2, 6, 4, 8, 1, 2, 5, 8, 9, 10, 12, 9, 7, 8, 3, 1, 0, 9, 2, 5 is ______.

  1. ((a))

    6

  2. ((b))

    5.5

  3. ((c))

    5

  4. ((d))

    6.5

Show Answer
Answer: ((a))

6

30

If an electric heater draws a current of 5 A when the potential difference across its terminals is 75 V, what current will it draw when the potential difference is increased to 150 V?

  1. ((a))

    10 A

  2. ((b))

    15 A

  3. ((c))

    20 A

  4. ((d))

    30 A

Show Answer
Answer: ((a))

10 A

31

Two sets of numbers are given below. In each set of numbers, certain mathematical operation(s) on the first number results in the second number. Similarly, certain mathematical operation(s) on the second number results in the third number and so on. Which of the given options follows the same set of operations as in the given sets?

(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 – Operations on 13 such as adding/subtracting/multiplying to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)

11 – 121 – 221 – 171; 27 – 729 – 829 – 779

  1. ((a))

    16 – 196 – 296 – 246

  2. ((b))

    13 – 169 – 244 – 188

  3. ((c))

    25 – 625 – 725 – 675

  4. ((d))

    23 – 529 – 629 – 589

Show Answer
Answer: ((a))

16 – 196 – 296 – 246

32

The HCF of two numbers is 62, and the other two factors of the LCM of these factors are 7 and 9. Which of the options given below can be a possible value of the smaller of the two numbers?

  1. ((a))

    432

  2. ((b))

    434

  3. ((c))

    433

  4. ((d))

    431

Show Answer
Answer: ((a))

432

33

If the sum of lengths of two adjacent sides of a parallelogram is 12 cm, then the perimeter of the parallelogram is: 

  1. ((a))

    34 cm

  2. ((b))

    36 cm

  3. ((c))

    20 cm

  4. ((d))

    24 cm

Show Answer
Answer: ((a))

34 cm

34

How many base units are given in the SI system?

  1. ((a))

    9

  2. ((b))

    7

  3. ((c))

    3

  4. ((d))

    11

Show Answer
Answer: ((a))

9

35

A is thrice as good a workman as B and together they can finish a piece of work in 12 days. In how many days can A alone finish the work?

  1. ((a))

    14 days

  2. ((b))

    12 days

  3. ((c))

    16 days

  4. ((d))

    18 days

Show Answer
Answer: ((a))

14 days

36

Which of the following is NOT one of the 5S principles?

  1. ((a))

    Sustain

  2. ((b))

    Supervise

  3. ((c))

    Standardise

  4. ((d))

    Sort

Show Answer
Answer: ((a))

Sustain

37

Based on the English alphabetical order, three of the following four letter-cluster pairs are alike in a certain way and thus form a group. Which letter-cluster pair DOES NOT belong to that group??

(Note: The odd one out is not based on the number of consonants/vowels or their position in the letter-cluster pair)

  1. ((a))

    DW – YA 

  2. ((b))

    MF – HJ

  3. ((c))

    WP – RS

  4. ((d))

    SL – NP

Show Answer
Answer: ((a))

DW – YA 

38

Which of the following is a poor conductor of heat? 

  1. ((a))

    Wool

  2. ((b))

    Steel spoon

  3. ((c))

    Copper

  4. ((d))

    Aluminium rod

Show Answer
Answer: ((a))

Wool

39

Rakesh starts a business with a capital of ₹2,50,000. He incurs a loss of 5% during the first year. However, he makes a profit of 4% on his remaining investment during the second year. Finally, he makes a profit of 20% on his new capital during the third year. Find his total profit at the end of three years.

  1. ((a))

    ₹46,400

  2. ((b))

    ₹46,500

  3. ((c))

    ₹46,700

  4. ((d))

    ₹46,600

Show Answer
Answer: ((a))

₹46,400

40

The resistances of 30 ohm, 20 ohm and 60 ohm are connected in parallel. The equivalent resistance of the combination is ________. 

  1. ((a))

    110 ohm

  2. ((b))

    0.1 ohm

  3. ((c))

    12 ohm

  4. ((d))

    10 ohm

Show Answer
Answer: ((a))

110 ohm

41

What should come in place of the question mark (?) in the given series?

UT27, RQ25, NM23, ?

  1. ((a))

    IG21

  2. ((b))

    IH29

  3. ((c))

    JH19

  4. ((d))

    IH21

Show Answer
Answer: ((a))

IG21

42

Refer to the following letter, number and symbol series and answer the question that follows. Counting to be done from left to right only.

(Left) K A T & 4 @ Y # 6 K & 2 R % 7 D 3 5 E * S (Right)

How many such symbols are there which are immediately preceded by a number and also immediately followed by a letter?

  1. ((a))

    One 

  2. ((b))

    Three

  3. ((c))

    Two

  4. ((d))

    Four

Show Answer
Answer: ((a))

One 

43

Match the following.

(A) Continuous thick lines(P) Projection lines
(B) Hidden lines(Q) Principal lines
(C) Outlines(R) Dotted lines
(D) Extension lines(S) Object lines
  1. ((a))

    A-S, B-R, C-Q, D-P

  2. ((b))

    A-R, B-S, C-Q, D-P

  3. ((c))

    A-S, B-R, C-P, D-Q

  4. ((d))

    A-P, B-R, C-Q, D-S

Show Answer
Answer: ((a))

A-S, B-R, C-Q, D-P

44

Which of the following is an example of uniform motion? 

  1. ((a))

    A vehicle moving through a crowded area

  2. ((b))

    A train moving at a constant speed on a straight track

  3. ((c))

    A sprinter running a 100-metre race with varying speed

  4. ((d))

    A ball rolling down a slope

Show Answer
Answer: ((a))

A vehicle moving through a crowded area

45

Two sets of numbers are given below. In each set of numbers, certain mathematical operation(s) on the first number results in the second number. Similarly, certain mathematical operation(s) on the second number results in the third number and so on. Which of the given options follows the same set of operations as in the given sets?

(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 – Operations on 13 such as adding/subtracting/multiplying to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)

24 – 48 – 108 – 36; 18 – 36 – 96 – 32

  1. ((a))

    82 – 139 – 234 – 78 

  2. ((b))

    132 – 264 – 444 – 138

  3. ((c))

    53 – 106 – 166 – 55

  4. ((d))

    48 – 96 – 156 – 52

Show Answer
Answer: ((a))

82 – 139 – 234 – 78 

46

Match the following, according to lettering and numbering (uppercase lettering) as per BIS SP: 46-2003.

Width (W)Capital letters
(A) 5(I) W
(B) 6(II) A, M, Q, V, X, Y
(C) 7(III) B, D, G, H, K, N, O, P, R, S, T, U and Z
(D) 9(IV) C, E, F, L
  1. ((a))

    A-(I), B-(III), C-(II), D-(IV)

  2. ((b))

    A-(IV), B-(III), C-(II), D-(I)

  3. ((c))

    A-(IV), B-(III), C-(I), D-(II)

  4. ((d))

    A-(IV), B-(II), C-(III), D-(I)

Show Answer
Answer: ((a))

A-(I), B-(III), C-(II), D-(IV)

47

An object of mass m is made to fall freely from a height h. As the object continues to fall, what will happen to its energy?

  1. ((a))

    The kinetic energy and potential energy will not change.

  2. ((b))

    The potential energy would decrease while the kinetic energy would increase.

  3. ((c))

    The potential energy would increase while the kinetic energy would decrease.

  4. ((d))

    The potential energy and kinetic energy will both increase. 

Show Answer
Answer: ((a))

The kinetic energy and potential energy will not change.

48

A can complete a piece of work in 18 days. B can complete it in 14 days. With the assistance of C, they completed the work in 7 days. C alone can complete it in ______________ days. 

  1. ((a))

    63

  2. ((b))

    42

  3. ((c))

    64

  4. ((d))

    36

Show Answer
Answer: ((a))

63

49

What should come in place of the question mark (?) in the given alpha-numeric series?

2M, 5O, 10R, 13T, 18W, 21Y, ?

  1. ((a))

    26B 

  2. ((b))

    26C

  3. ((c))

    24B

  4. ((d))

    26A

Show Answer
Answer: ((a))

26B 

50

The mode of 4, 6, 4, 6, 5, 7, 5, 7, 4, 6, 7, 6 is:

  1. ((a))

    4

  2. ((b))

    6

  3. ((c))

    5

  4. ((d))

    7

Show Answer
Answer: ((a))

4

51

How fast should a cat of mass 15 kg run in order to have a kinetic energy of 120 J?

  1. ((a))

    40 m/s

  2. ((b))

    4 m/s 

  3. ((c))

    16 m/s

  4. ((d))

    0.16 m/s

Show Answer
Answer: ((a))

40 m/s

52

In a certain code language, ‘WILD’ is coded as ‘8164’ and ‘DOGS’ is coded as ‘3517’. What is the code for ‘D’ in the given code language?

  1. ((a))

    4

  2. ((b))

    1

  3. ((c))

    3

  4. ((d))

    5

Show Answer
Answer: ((a))

4

53

Simran rides a distance of 60 m in one minute and then returns along the same straight path. The average velocity of her ride is _____. 

  1. ((a))

    0 m/s 

  2. ((b))

    2 m/s

  3. ((c))

    1 m/s

  4. ((d))

    60 m/s

Show Answer
Answer: ((a))

0 m/s 

54

The resistance of a metallic wire is R. If the radius of the metallic wire is reduced to half of its initial value while keeping all other parameters the same, the new resistance becomes ______.

  1. ((a))

    R4\frac{R}{4}

  2. ((b))

    R2\frac{R}{2}

  3. ((c))

    2R

  4. ((d))

    4R

Show Answer
Answer: ((a))

R4\frac{R}{4}

55

Select the pair that follows the same pattern as the one followed by the two sets of pairs given below. Both pairs follow the same pattern.

BSR : GQW

LOB : QMG

  1. ((a))

    RWH : WUM

  2. ((b))

    HVD : LTH

  3. ((c))

    KRW : NPZ

  4. ((d))

    QGT : TDW

Show Answer
Answer: ((a))

RWH : WUM

56

If 11.6 : x :: x : 2.9, and x > 0, then find the value of x. 

  1. ((a))

    10.9

  2. ((b))

    7.7

  3. ((c))

    5.8

  4. ((d))

    3.1

Show Answer
Answer: ((a))

10.9

57

What is the first step when encountering a system failure in a workplace?

  1. ((a))

    Report the issue and follow the emergency protocol

  2. ((b))

    Ignore the failure and continue working

  3. ((c))

    Immediately restart all systems without inspection

  4. ((d))

    Disconnect all power sources permanently

Show Answer
Answer: ((a))

Report the issue and follow the emergency protocol

58

What should come in place of the question mark (?) in the given series?

87 118 149 ? 211 242

  1. ((a))

    188

  2. ((b))

    171

  3. ((c))

    180

  4. ((d))

    199

Show Answer
Answer: ((a))

188

59

Jaspreet deposited a sum of ₹12,800 at 5% rate of interest per annum, compounded annually. The total amount (in ₹) received by Jaspreet after 2 years will be: 

  1. ((a))

    13,997

  2. ((b))

    14,112

  3. ((c))

    14,512

  4. ((d))

    14,442

Show Answer
Answer: ((a))

13,997

60

Which key combination is commonly used for copying text in many text editing applications in Windows?

  1. ((a))

    Ctrl+V

  2. ((b))

    Ctrl+S

  3. ((c))

    Ctrl+C

  4. ((d))

    Tab 

Show Answer
Answer: ((a))

Ctrl+V

61

How many significant figures are there in 4.700 m? 

  1. ((a))

    3

  2. ((b))

    1

  3. ((c))

    2

  4. ((d))

    4

Show Answer
Answer: ((a))

3

62

In a business, Tushar invests in ₹10,000 and Salil invests in ₹20,000. Tushar received 10% of the profit for managing the business and the rest of the profit is divided in the ratio of their capitals. Find Tushar's share of the profit (in ₹) in a profit of ₹14,400.

  1. ((a))

    5,610

  2. ((b))

    5,760

  3. ((c))

    5,510

  4. ((d))

    5,910

Show Answer
Answer: ((a))

5,610

63

Which of the following correctly describes the role of DNS (Domain Name System) in internet architecture? 

  1. ((a))

    DNS routes data packets to their destination across the internet.

  2. ((b))

    DNS translates domain names into IP addresses to allow browsers to locate web servers.

  3. ((c))

    DNS translates IP addresses into domain names to make them easier to remember.

  4. ((d))

    DNS secures the data transmitted over the internet by encrypting it.

Show Answer
Answer: ((a))

DNS routes data packets to their destination across the internet.

64

Which of the following is an INCORRECT formula for power?

  1. ((a))

    VI

  2. ((b))

    I2R

  3. ((c))

    I2Rt

  4. ((d))

    V2/R

Show Answer
Answer: ((a))

VI

65

A boy goes to school at a speed of 5 km/hr. He returns at a speed of 14 km/hr. He takes a total of 8 hours for both going to school and returning. The distance (in km) between his home and school is:

  1. ((a))

    29.5

  2. ((b))

    27

  3. ((c))

    28.6

  4. ((d))

    31

Show Answer
Answer: ((a))

29.5

66

Which of the following features allows the user to quickly find emails received from a specific sender?

  1. ((a))

    Archive

  2. ((b))

    Draft

  3. ((c))

    Filter

  4. ((d))

    Sort 

Show Answer
Answer: ((a))

Archive

67

If ‘A’ stands for ‘÷’, ‘B’ stands for ‘×’, ‘C’ stands for ‘+’ and ‘D’ stands for ‘−’, then what will come in place of the question mark (?) in the following equation?

35 A 7 C 9 B 3 D 16 = ?

  1. ((a))

    21

  2. ((b))

    18

  3. ((c))

    16

  4. ((d))

    10

Show Answer
Answer: ((a))

21

68

What is the main function of the Transport Layer in the internet architecture?

  1. ((a))

    Reliable data transfer and error correction

  2. ((b))

    Data encapsulation

  3. ((c))

    Routing of packets

  4. ((d))

    IP addressing

Show Answer
Answer: ((a))

Reliable data transfer and error correction

69

A line in an engineering drawing is the ____________.

  1. ((a))

    one-dimensional figure, which has length but no width

  2. ((b))

    dimensionless location in space or on a drawing sheet that has no width, height, or depth

  3. ((c))

    three-dimensional object with length, breadth, and height

  4. ((d))

    closed curve where all points are the same distance from a fixed centre point

Show Answer
Answer: ((a))

one-dimensional figure, which has length but no width

70

The heat developed in a 5 ohm resistor in 2 minutes when a 2A current passes through it is ________. 

  1. ((a))

    2400 J 

  2. ((b))

    500 J 

  3. ((c))

    1000 J

  4. ((d))

    40 J

Show Answer
Answer: ((a))

2400 J 

71

The areas of three adjacent faces of a solid cuboid are 162 cm2, 144 cm2 and 50 cm2. What is the volume (in cm3) of the cuboid?

  1. ((a))

    1080 

  2. ((b))

    805

  3. ((c))

    833

  4. ((d))

    1365

Show Answer
Answer: ((a))

1080 

72

Pihu starts her car at 9 a.m. to reach her office, which is 20 km away. She covers the first 10 km in 30 minutes and reaches her office at 10 a.m. Pihu’s motion is ________. 

  1. ((a))

    retarded motion

  2. ((b))

    non-uniform motion

  3. ((c))

    accelerated motion

  4. ((d))

    uniform motion 

Show Answer
Answer: ((a))

retarded motion

73

How does turning off unused electrical devices contribute to energy conservation?

  1. ((a))

    By lowering utility bills

  2. ((b))

    By enhancing device performance

  3. ((c))

    By degrading electrical devices

  4. ((d))

    By increasing energy use

Show Answer
Answer: ((a))

By lowering utility bills

74

An electric lamp with a resistance of 35 ohms and a conductor with a resistance of 5 ohms are connected to an 8 V battery in series. Calculate the current flowing through the circuit. 

  1. ((a))

    0.2 A

  2. ((b))

    1.82 A

  3. ((c))

    40 A 

  4. ((d))

    2 A

Show Answer
Answer: ((a))

0.2 A

75

Calculate the energy possessed by an object of mass 10 kg when it is raised to a height of 5 m from the ground. Given: g = 9.8 m s-2.

  1. ((a))

    500 J 

  2. ((b))

    450 J

  3. ((c))

    490 J

  4. ((d))

    400 J

Show Answer
Answer: ((a))

500 J 

76

If sinθ+cosθsinθ−cosθ=12\mathrm{\frac{sin \theta+cos\theta}{sin\theta-cos\theta}=12} then the value of 121tan2θ−3169Cot2θ+1\frac{121tan^2\theta - 3}{169Cot^2\theta + 1} is:

  1. ((a))

    −8321-\frac{83}{21}

  2. ((b))

    −8361-\frac{83}{61}

  3. ((c))

    8361\frac{83}{61}

  4. ((d))

    8321\frac{83}{21}

Show Answer
Answer: ((a))

−8321-\frac{83}{21}

77

E, F, G, H, P, Q, and R, are sitting around a circular table facing the centre. F sits fourth to the right of E. Only R sits between F and H. H is NOT an immediate neighbour of E. Only P sits between E and G.

How many people sit between G and Q when counted from the right of G?

  1. ((a))

    Two

  2. ((b))

    Three

  3. ((c))

    Four 

  4. ((d))

    One

Show Answer
Answer: ((a))

Two

78

Find the value of x2 + y2 , given that, x = 7 + √1, y = 7 − √1.

  1. ((a))

    56

  2. ((b))

    69

  3. ((c))

    100

  4. ((d))

    98

Show Answer
Answer: ((a))

56

79

How do we find absolute error?

  1. ((a))

    Absolute error = Actual value/observed value

  2. ((b))

    Absolute error = Actual value × observed value

  3. ((c))

    Absolute error = Actual value + observed value

  4. ((d))

    Absolute error = Actual value − observed value

Show Answer
Answer: ((a))

Absolute error = Actual value/observed value

80

What is the main advantage of using solar energy over fossil fuels? 

  1. ((a))

    Greenhouse gas emission is higher when solar energy is used.

  2. ((b))

    Solar energy extraction requires high operational cost when compared to fossil fuels.

  3. ((c))

    Solar energy requires mining and extraction, whereas fossil fuels are free of cost.

  4. ((d))

    Solar energy is abundantly available and renewable in nature.

Show Answer
Answer: ((a))

Greenhouse gas emission is higher when solar energy is used.

81

Which of the following is an effective way to prevent electrical accidents in the workplace?

  1. ((a))

    Working on live wires with bare hands

  2. ((b))

    Using water to cool overheated electrical equipment

  3. ((c))

    Using insulated tools and wearing rubber gloves

  4. ((d))

    Ignoring minor electrical faults

Show Answer
Answer: ((a))

Working on live wires with bare hands

82

Which term describes the maximum amount of solar energy that a photovoltaic (PV) system can convert into electricity under standard test conditions?

  1. ((a))

    Nameplate capacity

  2. ((b))

    Rated capacity

  3. ((c))

    Effective capacity

  4. ((d))

    Peak load

Show Answer
Answer: ((a))

Nameplate capacity

83

Aditya is using two thin blankets instead of one thick blanket in winter to keep himself warm because ________.

  1. ((a))

    the friction between the two blankets produces heat

  2. ((b))

    the air trapped between the blankets is a poor conductor of heat

  3. ((c))

    the blankets are at a higher temperature than the surroundings

  4. ((d))

    two blankets are cheaper than one thick blanket

Show Answer
Answer: ((a))

the friction between the two blankets produces heat

84

In a certain code language, ‘BORE’ is coded as ‘8624’ and ‘TABS’ is coded as ‘3217’. What is the code for ‘B’ in the given code language?

  1. ((a))

    7

  2. ((b))

    1

  3. ((c))

    2

  4. ((d))

    8

Show Answer
Answer: ((a))

7

85

Two trains of lengths 155 m and 160 m are running at speeds of 74 km/hr and 52 km/hr, respectively, on parallel tracks in opposite directions. In how many seconds will they pass each other? 

  1. ((a))

    9 seconds

  2. ((b))

    14 seconds

  3. ((c))

    7 seconds

  4. ((d))

    18 seconds

Show Answer
Answer: ((a))

9 seconds

86

In winters, people wear jacket because _____. 

  1. ((a))

    it looks good

  2. ((b))

    fabric of jacket is a conductor of heat so it traps body heat

  3. ((c))

    fabric of jacket is an insulator of heat so it traps body heat

  4. ((d))

    jacket allows the heat to flow from our body to surroundings

Show Answer
Answer: ((a))

it looks good

87

Akshay gets 2% increase in his sale amount in the first year and 25% in the second year. With that his present sale is ₹1,42,800. What was his sale (in ₹) two years ago? 

  1. ((a))

    1,14,240

  2. ((b))

    92,000

  3. ((c))

    1,40,000

  4. ((d))

    1,12,000

Show Answer
Answer: ((a))

1,14,240

88

What is the scientific notation for 55,60,000 km?

  1. ((a))

    5.56 × 106 km

  2. ((b))

    5.56 × 104 km

  3. ((c))

    55.6 × 104 km

  4. ((d))

    556 × 106 km

Show Answer
Answer: ((a))

5.56 × 106 km

89

Two containers, one painted black and the other painted white, have been kept in sunlight for one hour in the afternoon. Choose the correct observation.

  1. ((a))

    There is no effect on either container.

  2. ((b))

    The white container becomes hotter than the black container.

  3. ((c))

    The black container becomes hotter than the white container.

  4. ((d))

    Both containers become equally hot.

Show Answer
Answer: ((a))

There is no effect on either container.

90

The energy possessed by an object by virtue of its motion is known as ________. 

  1. ((a))

    kinetic energy

  2. ((b))

    potential energy

  3. ((c))

    heat energy

  4. ((d))

    light energy

Show Answer
Answer: ((a))

kinetic energy

91

Two sets of numbers are given below. In each set of numbers, certain mathematical operation(s) on the first number results in the second number. Similarly, certain mathematical operation(s) on the second number results in the third number and so on. Which of the given options follows the same set of operations as in the given sets?

(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 – Operations on 13 such as adding/subtracting/multiplying to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)

4 – 8 – 18 – 9

6 – 12 – 22 – 11

  1. ((a))

    8 – 16 – 26 – 13

  2. ((b))

    3 – 15 – 12 – 20

  3. ((c))

    9 – 18 – 28 – 20

  4. ((d))

    11 – 13 – 22 – 63

Show Answer
Answer: ((a))

8 – 16 – 26 – 13

92

Which of the following is the temperature range in a clinical thermometer?

  1. ((a))

    30°C to 43°C

  2. ((b))

    35°C to 42°C

  3. ((c))

    10°C to 45°C

  4. ((d))

    31°C to 44°C

Show Answer
Answer: ((a))

30°C to 43°C

93

Which of the following groups represents conductors of heat?

  1. ((a))

    Wood, paper, silver

  2. ((b))

    Paper, copper, plastic

  3. ((c))

    Aluminium, silver, copper

  4. ((d))

    Aluminium, plastic, wood

Show Answer
Answer: ((a))

Wood, paper, silver

94

Select the triad that follows the same pattern as that followed by the two triads given below. Both triads follow the same pattern.

JK - LM - NO

TU - VW - XY

  1. ((a))

    DE - FG - HI

  2. ((b))

    DE - FG - KL

  3. ((c))

    WE - DF - HI

  4. ((d))

    DE - FB - DF

Show Answer
Answer: ((a))

DE - FG - HI

95

In Engineering Drawing, principal lines are drawn to represent __________.

  1. ((a))

    interior or hidden edges

  2. ((b))

    axes of cylindrical, conical or spherical objects

  3. ((c))

    visible edges and surface boundaries of objects

  4. ((d))

    wide lines along which the prints are trimmed

Show Answer
Answer: ((a))

interior or hidden edges

96

A fruit seller had some apples. He sells 40% of the apples and now has 900 apples. How many apples did he originally have?

  1. ((a))

    1800

  2. ((b))

    2250

  3. ((c))

    1500

  4. ((d))

    1350

Show Answer
Answer: ((a))

1800

97

Based on the English alphabetical order, three of the following four letter-cluster pairs are alike in a certain way and thus form a group. Which letter-cluster pair DOES NOT belong to that group?

(Note: The odd one out is not based on the number of consonants/vowels or their position in the letter-cluster pair.)

  1. ((a))

    SA – WQ

  2. ((b))

    WE – AU

  3. ((c))

    DL – HB

  4. ((d))

    MU – QL 

Show Answer
Answer: ((a))

SA – WQ

98

Which of the following represents an item with kinetic energy? 

  1. ((a))

    An extended rubber band

  2. ((b))

    A stone in motion

  3. ((c))

    A book resting on a table

  4. ((d))

    A compressed spring

Show Answer
Answer: ((a))

An extended rubber band

99

In a certain code language,

'A × B' means ‘A is the son of B’,

'A − B' means ‘A is the brother of B’,

'A + B' means ‘A is the wife of B’ and

'A % B' means ‘A is the father of B’.

How is M related to T if ‘M × N % P + S − T’?

  1. ((a))

    Brother's wife's brother

  2. ((b))

    Brother's wife's father

  3. ((c))

    Brother's wife's father's brother

  4. ((d))

    Brother's wife's father's father 

Show Answer
Answer: ((a))

Brother's wife's brother

100

A person saves 50% of his income. If his expenditure is ₹640, then his income (in ₹) is: 

  1. ((a))

    600

  2. ((b))

    1,320

  3. ((c))

    560

  4. ((d))

    1,280

Show Answer
Answer: ((a))

600

Part B (75 questions)

101

What is the function of a half-wave rectifier in a power supply? 

  1. ((a))

    To convert AC voltage to DC voltage

  2. ((b))

    To regulate the output voltage

  3. ((c))

    To amplify the output voltage

  4. ((d))

    To filter the output voltage

Show Answer
Answer: ((a))

To convert AC voltage to DC voltage

102

In a JK flip-flop, if J = 0, K = 1 and the current state is Q = 1, what will be the next output after one clock pulse? 

  1. ((a))

    Q will remain 1; Q' will remain 0

  2. ((b))

    Q will toggle to 0; Q' will toggle to 1

  3. ((c))

    Q will be reset to 0; Q' will be set to 1

  4. ((d))

    The output will be undefined.

Show Answer
Answer: ((a))

Q will remain 1; Q' will remain 0

103

What is the effect of temperature changes on the frequency stability of a crystal oscillator? 

  1. ((a))

    The frequency stability is affected by temperature changes, but the effect is negligible.

  2. ((b))

    The frequency stability increases with increasing temperature.

  3. ((c))

    The frequency stability decreases with increasing temperature.

  4. ((d))

    The frequency stability remains constant with changing temperature.

Show Answer
Answer: ((a))

The frequency stability is affected by temperature changes, but the effect is negligible.

104

How can you extend a half adder to handle multi-bit binary addition?

  1. ((a))

    By using multiple half adders in series

  2. ((b))

    By cascading half adders with carry propagation

  3. ((c))

    By combining half adders and full adders

  4. ((d))

    By adding more XOR gates 

Show Answer
Answer: ((a))

By using multiple half adders in series

105

Why do cars have treaded tyres? 

  1. ((a))

    To decrease friction

  2. ((b))

    To increase speed

  3. ((c))

    To reduce weight

  4. ((d))

    To increase friction and grip on the road

Show Answer
Answer: ((a))

To decrease friction

106

What is the output of an RS flip-flop when Set = 0 and Reset = 0?

  1. ((a))

    No change in output

  2. ((b))

    Q = 0, Q' = 1

  3. ((c))

    Q = 1, Q' = 0

  4. ((d))

    Invalid state

Show Answer
Answer: ((a))

No change in output

107

A 200 V voltmeter has an internal resistance of 20 kΩ. To extend its range to 1,000 V, what should be the value of the series multiplier resistance? 

  1. ((a))

    200 kΩ

  2. ((b))

    80 kΩ

  3. ((c))

    120 kΩ

  4. ((d))

    100 kΩ

Show Answer
Answer: ((a))

200 kΩ

108

What is the impact of using a buffered parallel I/O port compared to a non-buffered one in terms of data transfer speed and reliability?

  1. ((a))

    Buffered I/O ports only work in unidirectional data transfer applications.

  2. ((b))

    Buffered I/O ports are slower but more reliable.

  3. ((c))

    Non-buffered I/O ports are faster but less reliable.

  4. ((d))

    Buffered I/O ports provide faster data transfer with a lower risk of data loss or corruption.

Show Answer
Answer: ((a))

Buffered I/O ports only work in unidirectional data transfer applications.

109

Which type of circuit is used to convert both the half-cycles of an AC waveform into a pulsating DC waveform?

  1. ((a))

    Clippers circuit

  2. ((b))

    Clamper circuit

  3. ((c))

    Half-wave rectifier

  4. ((d))

    Full-wave rectifier

Show Answer
Answer: ((a))

Clippers circuit

110

A statement and conclusion for pictorial drawing are given below. Determine the logical relationship between them.

Statement: Pictorial drawings are three-dimensional and provide a visual representation of an object.

Conclusion: Therefore, pictorial drawings are useful for describing the shape of a piece part or component.

  1. ((a))

    The conclusion does not logically follow from the statement.

  2. ((b))

    The conclusion is partially supported by the statement.

  3. ((c))

    The conclusion logically follows from the statement.

  4. ((d))

    The conclusion is unrelated to the statement.

Show Answer
Answer: ((a))

The conclusion does not logically follow from the statement.

111

What will happen if resistance is measured in a powered circuit?

  1. ((a))

    The resistance value will be higher than expected.

  2. ((b))

    The multimeter may get damaged.

  3. ((c))

    The reading will be accurate.

  4. ((d))

    The test leads will heat up.

Show Answer
Answer: ((a))

The resistance value will be higher than expected.

112

In a logic circuit, three SPST (Single Pole Single Throw) switches are used to implement a logic gate. The switches are connected in series. What is the output of the circuit if all switches are closed?

  1. ((a))

    The output will depend on the type of gate used

  2. ((b))

    1

  3. ((c))

    0

  4. ((d))

    Undefined

Show Answer
Answer: ((a))

The output will depend on the type of gate used

113

What is the main advantage of using a crystal oscillator over an RC oscillator?

  1. ((a))

    Lower frequency stability

  2. ((b))

    Higher output amplitude

  3. ((c))

    Higher frequency stability

  4. ((d))

    Lower output amplitude

Show Answer
Answer: ((a))

Lower frequency stability

114

Which option shows the correct answer when 27°C is converted to the kelvin scale?

  1. ((a))

    – 246 K

  2. ((b))

    – 300 K

  3. ((c))

    246 K

  4. ((d))

    300 K

Show Answer
Answer: ((a))

– 246 K

115

What is the working principle of an analogue vibrating reed frequency meter?

  1. ((a))

    Electromagnetic resonance

  2. ((b))

    Piezoelectric effect

  3. ((c))

    Thermal expansion

  4. ((d))

    Electrostatic attraction

Show Answer
Answer: ((a))

Electromagnetic resonance

116

Which of the following actions is a part of the emergency response team's responsibilities during an active emergency?

  1. ((a))

    Preparing reports on emergency incidents

  2. ((b))

    Conducting routine safety checks

  3. ((c))

    Rescuing persons in immediate danger

  4. ((d))

    Scheduling regular evacuation drills

Show Answer
Answer: ((a))

Preparing reports on emergency incidents

117

Which of the following statements is/are true about Non-Functional Dimensions (NF) in engineering drawing?

Statement 1: Non-functional Dimensions are shown without limits, as they do not affect the functionality of the component or space.

Statement 2: Non-Functional Dimensions are typically used for reference purposes only, and do not impact the assembly or performance of the component or space.

  1. ((a))

    Neither statement is true

  2. ((b))

    Only statement 1 is true

  3. ((c))

    Only statement 2 is true

  4. ((d))

    Both statements are true

Show Answer
Answer: ((a))

Neither statement is true

118

Which of the following is the size of the internal RAM in the 'Standard 8051' microcontroller? 

  1. ((a))

    128 bytes

  2. ((b))

    512 bytes

  3. ((c))

    1 kilo bytes

  4. ((d))

    256 bytes

Show Answer
Answer: ((a))

128 bytes

119

What is the purpose of the feedback network in an oscillator circuit?

  1. ((a))

    To provide impedance matching

  2. ((b))

    To provide a stable output voltage

  3. ((c))

    To provide positive feedback to sustain oscillations

  4. ((d))

    To filter out unwanted frequencies

Show Answer
Answer: ((a))

To provide impedance matching

120

Which of the following is INCORRECT about line standard?

  1. ((a))

    Quick measurements over a wide range

  2. ((b))

    More accurate due to line thickness

  3. ((c))

    Subject to parallax error

  4. ((d))

    Used to measure the distance between two engraved lines

Show Answer
Answer: ((a))

Quick measurements over a wide range

121

How much is the energy gap between the valence band and conduction band of silicon (Si)?

  1. ((a))

    0.5 eV

  2. ((b))

    2.5 eV

  3. ((c))

    3.5 eV

  4. ((d))

    1.1 eV

Show Answer
Answer: ((a))

0.5 eV

122

Which of the following care and maintenance of a marking table is INCORRECT?

  1. ((a))

    The marking table should be protected from damage.

  2. ((b))

    The surface of the marking table should not be given a thin layer of oil.

  3. ((c))

    After use, the marking table should be cleaned with a soft cloth.

  4. ((d))

    The marking table should be protected from rust. 

Show Answer
Answer: ((a))

The marking table should be protected from damage.

123

The given equation represents the relationship between temperature and resistance of an RTD.

Rt=Rref(1+αΔt)\mathrm{R_t=R_{ref}(1+\alpha\Delta t)}

What does Δt\mathrm{\Delta t} represent?

  1. ((a))

    Difference between operating and environmental temperature

  2. ((b))

    Operating temperature

  3. ((c))

    Difference between operating and reference temperature

  4. ((d))

    Reference temperature

Show Answer
Answer: ((a))

Difference between operating and environmental temperature

124

A rectangular floor measuring 10 m × 8 m is to be tiled. If each tile covers 0.25 m², how many tiles are needed?

  1. ((a))

    200

  2. ((b))

    250

  3. ((c))

    300

  4. ((d))

    320

Show Answer
Answer: ((a))

200

125

What is the typical output of a Zero Crossing Detector using an op-amp if the input applied is a sinusoidal ac signal?

  1. ((a))

    A trapezoidal wave

  2. ((b))

    A triangular wave

  3. ((c))

    A square wave

  4. ((d))

    A sinusoidal wave

Show Answer
Answer: ((a))

A trapezoidal wave

126

_________________ recommend(s) 20 mm wide margins for sheet sizes AO and A1 in engineering drawings.

  1. ((a))

    Borders and frames: SP: 46 (2003)

  2. ((b))

    Custom grids

  3. ((c))

    Geographic coordinate systems

  4. ((d))

    Grid reference system

Show Answer
Answer: ((a))

Borders and frames: SP: 46 (2003)

127

What is the primary function of the Program Status Word (PSW) SFR in the 8051? 

  1. ((a))

    To control the timer modes

  2. ((b))

    To store the address of the next instruction

  3. ((c))

    To enable external interrupts

  4. ((d))

    To store arithmetic flags and register bank select bits

Show Answer
Answer: ((a))

To control the timer modes

128

Match the following designations of sheets with their respective trimmed sizes in length and breadth. 

DesignationTrimmed Size
A) A0P) 297 × 420
B) A1Q) 420 × 594
C) A2R) 594 × 841
D) A3S) 841 × 1189
  1. ((a))

    A-S ; B-R ; C-Q ; D-P

  2. ((b))

    A-S ; B-P ; C-Q ; D-R

  3. ((c))

    A-P ; B-R ; C-Q ; D-S

  4. ((d))

    A-Q ; B-R ; C-S ; D-P

Show Answer
Answer: ((a))

A-S ; B-R ; C-Q ; D-P

129

If the multimeter reading shows '0.00' when measuring current, what could be the possible reason? 

  1. ((a))

    The battery of the multimeter is low.

  2. ((b))

    The probes are reversed.

  3. ((c))

    The fuse in the multimeter is blown.

  4. ((d))

    The circuit has no current flow.

Show Answer
Answer: ((a))

The battery of the multimeter is low.

130

What is the primary function of a 1:4 demux? 

  1. ((a))

    To combine multiple signals into one output

  2. ((b))

    To amplify an input signal

  3. ((c))

    To direct one input signal to four output lines

  4. ((d))

    To store input signals for later use

Show Answer
Answer: ((a))

To combine multiple signals into one output

131

In a monostable multivibrator using IC 555, what triggers the output pulse?

  1. ((a))

    Connecting a capacitor to ground 

  2. ((b))

    Resetting the flip-flop manually

  3. ((c))

    Applying a high voltage of value equal to Vcc at pin 5

  4. ((d))

    Applying a pulse with voltage going below 1/3 Vcc

Show Answer
Answer: ((a))

Connecting a capacitor to ground 

132

What is the purpose of the resistor 'R' in an RC oscillator? 

  1. ((a))

    To provide a means of filtering out all frequencies

  2. ((b))

    To provide a path for the output signal

  3. ((c))

    To provide a means of stabilising the supply votlage

  4. ((d))

    To provide a means of adjusting the frequency of oscillation

Show Answer
Answer: ((a))

To provide a means of filtering out all frequencies

133

What is the function of the resistor connected between Pin 7 (discharge) and Vcc in a monostable multivibrator? 

  1. ((a))

    It sets the output frequency.

  2. ((b))

    It provides a feedback path.

  3. ((c))

    It controls the charging time of the capacitor.

  4. ((d))

    It limits the current through the IC. 

Show Answer
Answer: ((a))

It sets the output frequency.

134

How can an OR gate be implemented using only NAND gates?

  1. ((a))

    Use four NAND gates - 2 as NOT gates and 2 for the NAND operation.

  2. ((b))

    Use three NAND gates - 2 as NOT gates and 1 for the NAND operation.

  3. ((c))

    Use one NAND gate - 1 for the OR operation directly.

  4. ((d))

    Use two NAND gates - 1 as NOT gates and 1 for the OR operation.

Show Answer
Answer: ((a))

Use four NAND gates - 2 as NOT gates and 2 for the NAND operation.

135

What is the gain of a voltage amplifier if the input voltage is 2 V and the output voltage is 10 V? 

  1. ((a))

    20

  2. ((b))

    10

  3. ((c))

    2

  4. ((d))

    5

Show Answer
Answer: ((a))

20

136

In a circuit with a NTC type thermistor and a fixed resistor connected in series connected to a DC power supply, what will happen to the output voltage if there is a rise in temperature?

  1. ((a))

    The output voltage will remain constant.

  2. ((b))

    The output voltage will decrease.

  3. ((c))

    The output voltage will fluctuate depending on the resistor value.

  4. ((d))

    The output voltage will increase.

Show Answer
Answer: ((a))

The output voltage will remain constant.

137

What will be the output of a Zero Crossing Detector if the input signal is a triangular wave instead of a sine wave?

  1. ((a))

    The output will remain at zero.

  2. ((b))

    The output will be a triangular waveform.

  3. ((c))

    The output will have multiple transitions at each crossing.

  4. ((d))

    The output will still be a square wave but maybe with unequal high and low periods.

Show Answer
Answer: ((a))

The output will remain at zero.

138

Which of the following points is NOT relevant to a LVDT?

  1. ((a))

    Low sensitivity

  2. ((b))

    Low power consumption

  3. ((c))

    Less rugged

  4. ((d))

    Prone to more friction

Show Answer
Answer: ((a))

Low sensitivity

139

The SI unit of 'ultimate stress' is ________. 

  1. ((a))

    pascal (Pa)

  2. ((b))

    joule per square meter (J/m² )

  3. ((c))

    newton (N)

  4. ((d))

    newton per meter (N/m)

Show Answer
Answer: ((a))

pascal (Pa)

140

What is the main advantage of using a Colpitts oscillator over a Hartley oscillator in terms of frequency stability?

  1. ((a))

    The frequency stability of both oscillators is dependent on the values of the components used.

  2. ((b))

    The Colpitts oscillator has a more stable frequency than the Hartley oscillator due to its capacitive voltage divider.

  3. ((c))

    The Hartley oscillator has a more stable frequency than the Colpitts oscillator due to its inductive voltage divider.

  4. ((d))

    The frequency stability of both oscillators is the same.

Show Answer
Answer: ((a))

The frequency stability of both oscillators is dependent on the values of the components used.

141

What is the primary reason for conducting a vehicle road test?

  1. ((a))

    To ensure the vehicle is functioning safely and correctly 

  2. ((b))

    To increase fuel efficiency

  3. ((c))

    To test how fast the vehicle can go

  4. ((d))

    To avoid the need for inspections

Show Answer
Answer: ((a))

To ensure the vehicle is functioning safely and correctly 

142

Natural rubber is soft at high temperatures and brittle at low temperatures; hence raw rubber is heated with sulphur and other additives at a temperature range between 373 – 415 K to make it strong. This process is called ______ of rubber. 

  1. ((a))

    extrusion

  2. ((b))

    latex

  3. ((c))

    molding

  4. ((d))

    vulcanisation

Show Answer
Answer: ((a))

extrusion

143

Electrical energy is measured in which unit?

  1. ((a))

    Joule

  2. ((b))

    Ampere-hour (Ah)

  3. ((c))

    Watt

  4. ((d))

    Kilowatt-hour (kWh)

Show Answer
Answer: ((a))

Joule

144

An angle greater than 180 degrees is referred to as ________________. 

  1. ((a))

    a right angle

  2. ((b))

    an acute angle

  3. ((c))

    a reflex angle

  4. ((d))

    an obtuse angle

Show Answer
Answer: ((a))

a right angle

145

What is the primary purpose of preventive maintenance?

  1. ((a))

    To increase the workload of employees

  2. ((b))

    To eliminate the need for regular inspections

  3. ((c))

    To delay repairs until breakdowns occur

  4. ((d))

    To reduce unexpected equipment failures

Show Answer
Answer: ((a))

To increase the workload of employees

146

Match the following sensor selection criteria with their correct definitions.

CriteriaDefinion
I. Operang rangeA. Chosen to allow sufficient output
II. SensivityB. Chosen to maintain range requirement
III. Frequency responseC. Flat over enre desired range
  1. ((a))

    I-A, II- B, III-C

  2. ((b))

    I-B, II- A, III-C

  3. ((c))

    I-A, II- C, III-B

  4. ((d))

    I-B, II- C, III-A

Show Answer
Answer: ((a))

I-A, II- B, III-C

147

What is the primary purpose of shielding in electrical cables?

  1. ((a))

    To protect the cable from external electromagnetic interference

  2. ((b))

    To increase the current-carrying capacity of the cable

  3. ((c))

    To increase the voltage capacity of the cable

  4. ((d))

    To prevent heat loss from the cable

Show Answer
Answer: ((a))

To protect the cable from external electromagnetic interference

148

For a JK flip-flop, if the J input is held at 1 and the K input is held at 0, what will happen?

  1. ((a))

    The output will be set to 1.

  2. ((b))

    The output will toggle on each clock pulse.

  3. ((c))

    The output will always be 1.

  4. ((d))

    The output will always be 0

Show Answer
Answer: ((a))

The output will be set to 1.

149

Which of the following is a primary difference between a primary and a secondary electrochemical cell?

  1. ((a))

    A secondary cell produces more energy than a primary cell.

  2. ((b))

    A primary cell can be recharged, while a secondary cell cannot be recharged.

  3. ((c))

    There is no difference between primary and secondary cells.

  4. ((d))

    A primary cell cannot be recharged, while a secondary cell can be recharged.

Show Answer
Answer: ((a))

A secondary cell produces more energy than a primary cell.

150

Which of the following is the primary advantage of using parallel I/O ports over serial I/O ports? 

  1. ((a))

    They consume less power.

  2. ((b))

    They are more commonly used in modern systems than serial I/O ports.

  3. ((c))

    They are faster due to simultaneous transmission of data bits.

  4. ((d))

    They require fewer wires for data transmission. 

Show Answer
Answer: ((a))

They consume less power.

151

Which of the following screwdrivers has cross-shaped tips that are unlikely to slip from the cruciform slots in Philips recessed head screws?

  1. ((a))

    Cross-recess screwdriver

  2. ((b))

    Stumpy screwdriver

  3. ((c))

    Ratchet screwdriver

  4. ((d))

    Offset screwdriver

Show Answer
Answer: ((a))

Cross-recess screwdriver

152

Which parameter of the carrier pulse is impacted during pulse width modulation of pulse train due to continuous time varying analog signal?

  1. ((a))

    Duty cycle

  2. ((b))

    Only amplitude

  3. ((c))

    Both amplitude and frequency

  4. ((d))

    Only frequency

Show Answer
Answer: ((a))

Duty cycle

153

What is the output state of a JK flip-flop when J = 0 and K = 0?

  1. ((a))

    No change in output

  2. ((b))

    Output Q = 1, Q' = 1

  3. ((c))

    Output Q = 0, Q' = 1

  4. ((d))

    Output Q = 1, Q' = 0

Show Answer
Answer: ((a))

No change in output

154

Sine bars are used when a high degree of accuracy less than _________ is needed for measuring angles.

  1. ((a))

    1 degree

  2. ((b))

    30 degrees

  3. ((c))

    30 minutes

  4. ((d))

    1 minute

Show Answer
Answer: ((a))

1 degree

155

Identify the circuit most suitable for demodulating or processing the PAM signal at the receiver end.

  1. ((a))

    Attenuator

  2. ((b))

    Mixer

  3. ((c))

    Oscillator

  4. ((d))

    Low pass filter

Show Answer
Answer: ((a))

Attenuator

156

The colour code of a resistor to be measured is yellow, violet, red and silver for the first, second, third and fourth bands, respectively. What is the maximum value of the resistor?

  1. ((a))

    4,230 ohms

  2. ((b))

    5,170 ohms

  3. ((c))

    6,130 ohms

  4. ((d))

    7,210 ohms

Show Answer
Answer: ((a))

4,230 ohms

157

Which of the following is a key electrical safety tip in a workshop?

  1. ((a))

    Ignore frayed wires if the device is still working

  2. ((b))

    Operate machines with wet hands

  3. ((c))

    Ensure electrical equipment is properly grounded

  4. ((d))

    Use water to clean electrical panels

Show Answer
Answer: ((a))

Ignore frayed wires if the device is still working

158

Why is a braking system used in an energy meter?

  1. ((a))

    To reduce the power consumption of the meter itself

  2. ((b))

    To increase the speed of the rotating disk

  3. ((c))

    To maintain a uniform rotation proportional to power consumption

  4. ((d))

    To decrease the friction in the moving parts

Show Answer
Answer: ((a))

To reduce the power consumption of the meter itself

159

What is the term used to describe programs that distinguish between uppercase and lowercase letters, treating "yes" and "YES" as different inputs?

  1. ((a))

    Numerical

  2. ((b))

    Alphabetical

  3. ((c))

    Case-sensitive

  4. ((d))

    Case-insensitive

Show Answer
Answer: ((a))

Numerical

160

What is the primary goal of the 5S concept?

  1. ((a))

    To eliminate the need for maintenance

  2. ((b))

    To replace traditional safety measures

  3. ((c))

    To improve workplace organisation and efficiency

  4. ((d))

    To increase the number of safety regulations

Show Answer
Answer: ((a))

To eliminate the need for maintenance

161

A 100-mm centre-punch could have a 10-mm diameter body and a 6-mm diameter point ground to an angle of _________. 

  1. ((a))

    60°

  2. ((b))

    30°

  3. ((c))

    90°

  4. ((d))

    120°

Show Answer
Answer: ((a))

60°

162

What is the Boolean expression for the sum output of a full adder with inputs A, B and Carry-in (Cin)? 

  1. ((a))

    A⋅B+A'.B

  2. ((b))

    A⊕B⊕Cin

  3. ((c))

    ABCin

  4. ((d))

    A+B+Cin

Show Answer
Answer: ((a))

A⋅B+A'.B

163

What is the purpose of the two voltage coils in a power factor meter?

  1. ((a))

    To improve measurement accuracy in DC circuits

  2. ((b))

    To measure active and reactive power

  3. ((c))

    To measure power factor at two different frequencies

  4. ((d))

    To create a rotating field for phase angle measurement

Show Answer
Answer: ((a))

To improve measurement accuracy in DC circuits

164

For which of the following calipers, a screw and nut are provided for opening and closing the caliper legs?

  1. ((a))

    Simple calipers

  2. ((b))

    Leg and point calipers

  3. ((c))

    Firm joint calipers

  4. ((d))

    Spring joint calipers

Show Answer
Answer: ((a))

Simple calipers

165

What does 'OL' or '1' indicate when measuring voltage with a digital multimeter?

  1. ((a))

    The test leads are shorted.

  2. ((b))

    The voltage is too low.

  3. ((c))

    The voltage exceeds the selected range.

  4. ((d))

    The battery is low.

Show Answer
Answer: ((a))

The test leads are shorted.

166

An LVDT has a secondary voltage of 5 V for a displacement of ±10 mm. Determine the output voltage for a core displacement of 6 mm.

  1. ((a))

    3 V

  2. ((b))

    0.5 V

  3. ((c))

    1.5 V

  4. ((d))

    4.5 V

Show Answer
Answer: ((a))

3 V

167

Which of the following conversions are correct?

  1. ((a))

    1 L = 1 dm3 and 1 mL = 1 cm3

  2. ((b))

    1000 L = 1 dm3 and 1 mL = 1000 cm3

  3. ((c))

    1000 L = 1 dm3 and 1000 mL = 1 cm3

  4. ((d))

    1 L = 1000 dm3 and 1 mL = 1000 cm3

Show Answer
Answer: ((a))

1 L = 1 dm3 and 1 mL = 1 cm3

168

How can an AND gate be implemented using only NAND gates?

  1. ((a))

    By connecting OR gate to NAND gate

  2. ((b))

    By inverting the output of a NAND gate

  3. ((c))

    By connecting the inputs of a NAND gate to logic 1

  4. ((d))

    By connecting two NAND gates in Parallel

Show Answer
Answer: ((a))

By connecting OR gate to NAND gate

169

Which of the following is a major risk associated with fuel spillage? 

  1. ((a))

    Increased productivity

  2. ((b))

    Reduced need for ventilation

  3. ((c))

    Better lubrication for workshop floors

  4. ((d))

    Fire hazards and environmental contamination

Show Answer
Answer: ((a))

Increased productivity

170

What is the function of a 4-to-1 multiplexer? 

  1. ((a))

    It multiplies four data inputs to one output.

  2. ((b))

    It selects one of four select lines based on two data inputs.

  3. ((c))

    It routes four data inputs to one output without selection.

  4. ((d))

    It selects one of four data inputs based on two select lines.

Show Answer
Answer: ((a))

It multiplies four data inputs to one output.

171

A multimeter’s internal fuse is rated at 250 mA. If a circuit draws 1 A, what will happen when measuring current? 

  1. ((a))

    The multimeter will read 1A accurately.

  2. ((b))

    The fuse will blow, and no current will be measured.

  3. ((c))

    The reading will be lower than expected.

  4. ((d))

    The multimeter will automatically adjust to the correct range.

Show Answer
Answer: ((a))

The multimeter will read 1A accurately.

172

The use of the modulation process helps in shifting the given message signal frequencies to a _______ range where it can occupy only ______ percentage of the spectrum. 

  1. ((a))

    very low frequency; high

  2. ((b))

    very high frequency; high

  3. ((c))

    very low frequency; very small

  4. ((d))

    very high frequency; very small

Show Answer
Answer: ((a))

very low frequency; high

173

In a positive feedback oscillator, what is the effect of increasing the gain of the amplifier (A) on the frequency of oscillation?

  1. ((a))

    The frequency of oscillation becomes unstable.

  2. ((b))

    The frequency of oscillation decreases.

  3. ((c))

    The frequency of oscillation remains unchanged.

  4. ((d))

    The frequency of oscillation increases.

Show Answer
Answer: ((a))

The frequency of oscillation becomes unstable.

174

What is the primary reason for the heating effect in a conductor when an electric current passes through it? 

  1. ((a))

    The movement of electrons causes heat generation.

  2. ((b))

    The movement of protons causes heat generation.

  3. ((c))

    The electric field in the conductor causes heat generation.

  4. ((d))

    The conductor absorbs heat from the surrounding environment.

Show Answer
Answer: ((a))

The movement of electrons causes heat generation.

175

The accuracy of measurement by a try square is about: 

  1. ((a))

    0.001 mm per 10 mm length

  2. ((b))

    0.002 mm per 10 mm length

  3. ((c))

    0.004 mm per 10 mm length

  4. ((d))

    0.02 mm per 10 mm length

Show Answer
Answer: ((a))

0.001 mm per 10 mm length

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