Official Paper

RRB ALP Electrician 23 Jan 2019 Official Paper (Shift 3) (Previous Year Paper)

175 questions · 150 minutes · with answers · free

Attempt as Timed Mock Test

Part A (100 questions)

1

Name the scientist who discovered bacteria ?

  1. ((a))

    Robert Koch

  2. ((b))

    James Chadwick

  3. ((c))

    Eugen Goldstein

  4. ((d))

    A V Leeuwenhoek

Show Answer
Answer: ((a))

Robert Koch

2

If a body has a specific gravity of less than 1, then it will float in/on ___________.

  1. ((a))

    air

  2. ((b))

    water

  3. ((c))

    liquids

  4. ((d))

    mercury

Show Answer
Answer: ((a))

air

3

Which of the following options does not have an SI base unit?

  1. ((a))

    Amount of substance

  2. ((b))

    Frequency

  3. ((c))

    Luminous intensity

  4. ((d))

    Electric current

Show Answer
Answer: ((a))

Amount of substance

4

How many medals did India win in Rio Olympics, 2016?

  1. ((a))

    3

  2. ((b))

    4

  3. ((c))

    2

  4. ((d))

    5

Show Answer
Answer: ((a))

3

5

It is mainly due to the gravitational effect of the __________ on the rotating earth that the level of water in the sea rises and falls.

  1. ((a))

    Venus

  2. ((b))

    Mercury

  3. ((c))

    Moon

  4. ((d))

    Sun

Show Answer
Answer: ((a))

Venus

6

Two resistance of 2Ω and 6Ω are connected in series and this combination is connected across a 12 V battery. Find the current in the 6Ω resistor.

  1. ((a))

    3.5 A

  2. ((b))
    1. 5 A
  3. ((c))

    0.5 A

  4. ((d))

    2.5 A

Show Answer
Answer: ((a))

3.5 A

7

Substances that are broken down by biological processes are said to be _________.

  1. ((a))

    reusable

  2. ((b))

    non-biodegradabl

  3. ((c))

    non-reusable

  4. ((d))

    biodegradable

Show Answer
Answer: ((a))

reusable

8

A software program that has been developed to harm other computers is called a/an _________.

  1. ((a))

    server

  2. ((b))

    LAN

  3. ((c))

    malware

  4. ((d))

    operating system

Show Answer
Answer: ((a))

server

9

Kuchipudi has its roots in which Indian State?

  1. ((a))

    Arunachal Pradesh

  2. ((b))

    Kerala

  3. ((c))

    Andhra Pradesh

  4. ((d))

    Himachal Pradesh

Show Answer
Answer: ((a))

Arunachal Pradesh

10

Which Indian cricketer received the Padma Bhushan in 2018?

  1. ((a))

    MS Dhoni

  2. ((b))

    Virat Kohli

  3. ((c))

    Sachin Tendulkar

  4. ((d))

    Saurav Ganguly

Show Answer
Answer: ((a))

MS Dhoni

11

JPEG stands for __________.

  1. ((a))

    Joint Program Experts Group

  2. ((b))

    Joint Program Executing Group

  3. ((c))

    Joint Photographic Experts Group

  4. ((d))

    Joint Program Experimental Group.

Show Answer
Answer: ((a))

Joint Program Experts Group

12

Two resistors, one of 12 Ω and the other of 24 Ω are connected in parallel. This combination is connected in series with a 22 Ω resistor and a 12 V battery. The current in the 12 Ω resistor is __________.

  1. ((a))

    (8/15) A

  2. ((b))

    (2/15) A

  3. ((c))

    (6/15) A

  4. ((d))

    (4/15) A

Show Answer
Answer: ((a))

(8/15) A

13

RK Narayan is famous for his book ___________.

  1. ((a))

    The Room on the Roof

  2. ((b))

    Two Livers

  3. ((c))

    Malgudi Days

  4. ((d))

    A suitable Boy

Show Answer
Answer: ((a))

The Room on the Roof

14

_________ protection must be worn whenever noise levels exceed the noise exposure standard.

  1. ((a))

    Hearing

  2. ((b))

    Head

  3. ((c))

    Eye

  4. ((d))

    Foot

Show Answer
Answer: ((a))

Hearing

15

A wire of length 1 and radius r has a resistance R. The resistance of another wire made of the same material but having half its length and half its radius will be.

  1. ((a))

    4R

  2. ((b))

    R/2

  3. ((c))

    2R

  4. ((d))

    R

Show Answer
Answer: ((a))

4R

16

Safety boots or shoes must be worn in designated areas to protect your _______  from falling objects.

  1. ((a))

    eye

  2. ((b))

    ear

  3. ((c))

    head

  4. ((d))

    feet

Show Answer
Answer: ((a))

eye

17

A cylindrical wire of length L and radius r has a resistance of R. The resistance of another wire of the same material but thrice its length and one-third its radius will be __________.

  1. ((a))

    27R

  2. ((b))

    9R

  3. ((c))

    R

  4. ((d))

    3R

Show Answer
Answer: ((a))

27R

18

If a body is NOT homogeneous, then its density is a function of its ___________.

  1. ((a))

    pressure

  2. ((b))

    acceleration

  3. ((c))

    position

  4. ((d))

    velocity

Show Answer
Answer: ((a))

pressure

19

Two resistors of 10Ω and 20 Ω area connected in series and this combination is connected across a 30 V supply voltage. Find the voltage across the 10 Ω resistor.

  1. ((a))

    20 V

  2. ((b))

    10 V

  3. ((c))

    5 V

  4. ((d))

    15 V

Show Answer
Answer: ((a))

20 V

20

Which one of these is a harvest festival? 

  1. ((a))

    Teej

  2. ((b))

    Janmashtami

  3. ((c))

    Deepawali

  4. ((d))

    Onam

Show Answer
Answer: ((a))

Teej

21

86°F is equal to __________

  1. ((a))

    20°C

  2. ((b))

    30°C

  3. ((c))

    34°C

  4. ((d))

    10°C

Show Answer
Answer: ((a))

20°C

22

Where is the Headquarters of UNESCO located?

  1. ((a))

    New York City

  2. ((b))

    Geneva

  3. ((c))

    Paris

  4. ((d))

    Washington DC

Show Answer
Answer: ((a))

New York City

23

Name of the painter of famous painting, ‘Mahishasura’.

  1. ((a))

    MF Hussain

  2. ((b))

    Amrita Sher-Gil

  3. ((c))

    Raja Ravi Verma

  4. ((d))

    Tyeb Mehta

Show Answer
Answer: ((a))

MF Hussain

24

What is the work that needs to be done to increase the speed of a 1 kg ball from 2 m/s to 4 m/s?

  1. ((a))

    8 J

  2. ((b))

    10 J

  3. ((c))

    6 J

  4. ((d))

    12 J

Show Answer
Answer: ((a))

8 J

25

The Ajanta Caves in Maharashtra feature paintings and sculptures that depict __________ tales.

  1. ((a))

    Arabic

  2. ((b))

    Islamic

  3. ((c))

    Buddhist

  4. ((d))

    Maratha

Show Answer
Answer: ((a))

Arabic

26

The volume of a given amount of water ________ between 0°C to 4°C.

  1. ((a))

    is zero

  2. ((b))

    decreases

  3. ((c))

    remains constant

  4. ((d))

    increases

Show Answer
Answer: ((a))

is zero

27

Two resistance of 2Ω and 6Ω are connected in series and this combination is connected across a 12 V  bettery. Find the power supplied by the battery.

  1. ((a))

    10 W

  2. ((b))

    18 W

  3. ((c))

    16 W

  4. ((d))

    14 W

Show Answer
Answer: ((a))

10 W

28

An object weighs X units on the earth. If we take the same object to the moon, its weight there will be ________.

  1. ((a))

    zero

  2. ((b))

    less than X

  3. ((c))

    equal to X

  4. ((d))

    more than X

Show Answer
Answer: ((a))

zero

29

A body starts from rest. Its displacement is proportional to _________ when its acceleration is constant.

  1. ((a))

    time squared

  2. ((b))

    velocity

  3. ((c))

    work

  4. ((d))

    time

Show Answer
Answer: ((a))

time squared

30

A source of voltage V maintains a current i in a circuit. The energy supplied to the circuit by the source in time t is __________.

  1. ((a))

    Vit

  2. ((b))

    1/Vit

  3. ((c))

    Vi/t

  4. ((d))

    V/it

Show Answer
Answer: ((a))

Vit

31

Who was the first governor of the Reserve Bank of India?

  1. ((a))

    Sir James Braid Taylor

  2. ((b))

    KR Puri

  3. ((c))

    HVR Iyengar

  4. ((d))

    Sir Osborne A Smith

Show Answer
Answer: ((a))

Sir James Braid Taylor

32

A car covers 400 m in 20 seconds. Find the average speed (in km/hr) of the car. 

  1. ((a))

    72

  2. ((b))

    124

  3. ((c))

    108

  4. ((d))

    36

Show Answer
Answer: ((a))

72

33

If sin θ = 15/17, then cot θ = ? 

  1. ((a))

    815\frac{8}{{15}}

  2. ((b))

    817\frac{8}{{17}}

  3. ((c))

    158\frac{{15}}{8}

  4. ((d))

    1715\frac{{17}}{{15}}

Show Answer
Answer: ((a))

815\frac{8}{{15}}

34

In an examination, the highest score and the lowest score are different by 55 and the higher one was 9/4 times the lower one. Find the lowest score.

  1. ((a))

    40  

  2. ((b))

    36

  3. ((c))

    44

  4. ((d))

    48

Show Answer
Answer: ((a))

40  

35

A number is as much greater than 50 as it is lesser than 84. What is the number?

  1. ((a))

    65

  2. ((b))

    66

  3. ((c))

    68

  4. ((d))

    67

Show Answer
Answer: ((a))

65

36

If x=125×30×6x = \sqrt {125} \times \sqrt {30} \times \sqrt 6  ,  then x is equal to:

  1. ((a))

    175

  2. ((b))

    125

  3. ((c))

    136

  4. ((d))

    150

Show Answer
Answer: ((a))

175

37

A got Rs. 80 as his share of profit where the total profit was Rs. 240 and the ratio of profit distribution between A and B was x : 2. What is the value of x? 

  1. ((a))

    1

  2. ((b))

    4

  3. ((c))

    2

  4. ((d))

    5

Show Answer
Answer: ((a))

1

38

What is the median of 8, 5, 7, 9, 11, 6, 10?

  1. ((a))

    9

  2. ((b))

    8

  3. ((c))

    10

  4. ((d))

    7

Show Answer
Answer: ((a))

9

39

If 5050 × 0.5x = 25250, then 2505 ÷ x2 = ?

  1. ((a))

    0.2505

  2. ((b))

    25.05

  3. ((c))

    2.505

  4. ((d))

    250.5

Show Answer
Answer: ((a))

0.2505

40

An article of marked price Rs. 12000 was sold. Had a discount of 15% been offered, a profit of 2% would have been made. What was the cost price?

  1. ((a))

    Rs. 10,200

  2. ((b))

    Rs. 10,000

  3. ((c))

    Rs. 11,000

  4. ((d))

    Rs. 10,800

Show Answer
Answer: ((a))

Rs. 10,200

41

A sum of Rs. 2,000 was spent in buying a pair of trousers. The sum spent was 2/5th of the total money Shashi had with her. How much was the total money she had?

  1. ((a))

    Rs. 4,000

  2. ((b))

    Rs. 4, 250 

  3. ((c))

    Rs. 4, 750

  4. ((d))

    Rs. 5,000 

Show Answer
Answer: ((a))

Rs. 4,000

42

A machine was bought for Rs. 1,500 and a repairing charge of Rs. 100 was paid afterwards. At what price should it be sold to gain a profit of 25%?

  1. ((a))

    Rs. 2,040

  2. ((b))

    Rs. 1,960

  3. ((c))

    Rs. 2,000

  4. ((d))

    Rs. 1, 920

Show Answer
Answer: ((a))

Rs. 2,040

43

In angular measurement, one radian is equivalent to ________ degree (approximately).

  1. ((a))

    65.27

  2. ((b))

    57.27

  3. ((c))

    90

  4. ((d))

    180

Show Answer
Answer: ((a))

65.27

44

A and B can do a work in 15 days. B and C can do the work in 20 days and A and C can do the work in 10 days. In how many days will they together completed the work?

  1. ((a))

    10.67 days

  2. ((b))

    10.91 days

  3. ((c))

    10.71 days

  4. ((d))

    9.23 days

Show Answer
Answer: ((a))

10.67 days

45

Pipes A and B can fill a tank in 12 minutes and 16 minutes respectively. Both A and B are opened for 4 minutes and then A is closed. How much extra time will B take to fill the tank completely?

  1. ((a))

    203\frac{{20}}{3} minutes

  2. ((b))

    7 minutes

  3. ((c))

    214\frac{{21}}{4} minutes

  4. ((d))

    6 minutes

Show Answer
Answer: ((a))

203\frac{{20}}{3} minutes

46

A can do 2/5 of a work in 10 days. B can do ½ of the some work in 10 days. They worked together for 5 days and then A left. In how many days will B finish the remaining work?

  1. ((a))

    8

  2. ((b))

    10

  3. ((c))

    11

  4. ((d))

    9

Show Answer
Answer: ((a))

8

47

Reflection of point (-2, -6) on the Y-axis is:

  1. ((a))

    (2, 6)

  2. ((b))

    (-6, -2)

  3. ((c))

    (-2, 6)

  4. ((d))

    (2, -6)

Show Answer
Answer: ((a))

(2, 6)

48

The pie chart shows the breakup in percentage of the various expenses of a Company. Study the diagram and answer the following question. 

What is the interest expense if total expenses is Rs. 25000.

  1. ((a))

    Rs. 2, 500

  2. ((b))

    Rs. 1, 800

  3. ((c))

    Rs. 9, 000

  4. ((d))

    Rs. 5, 000

Show Answer
Answer: ((a))

Rs. 2, 500

49

A motorcycle travelled 1000 m at 36 km/hr. Find the time (in seconds) taken by the motorcycle to cover this distance.

  1. ((a))

    300

  2. ((b))

    100

  3. ((c))

    400

  4. ((d))

    200

Show Answer
Answer: ((a))

300

50

A 4-digit number 1xy7 is divisible by 11. What is the value of x - y?

  1. ((a))

    -8

  2. ((b))

    -2

  3. ((c))

    -4

  4. ((d))

    -6

Show Answer
Answer: ((a))

-8

51

Tap M and N can together fill a cistern in 48/13 minutes. N alone can fill it in 6 minutes. How much time will M alone take to fill the cistern?

  1. ((a))

    9.6 minutes

  2. ((b))

    9 minutes

  3. ((c))

    9.4 minutes

  4. ((d))

    8.6 minutes

Show Answer
Answer: ((a))

9.6 minutes

52

What is the curved surface area of a hemisphere whose radius is 7 cm? (take π = 22/7)

  1. ((a))

    616 cm2

  2. ((b))

    154 cm2

  3. ((c))

    308 cm2

  4. ((d))

    924 cm2

Show Answer
Answer: ((a))

616 cm2

53

An airplane flies at the speed of 50 m/s. How much distance (in km) will it cover in a flight of 5 hours?

  1. ((a))

    895

  2. ((b))

    850

  3. ((c))

    880

  4. ((d))

    900

Show Answer
Answer: ((a))

895

54

What is the distance between the points (4, 3) and (3, -2)?

  1. ((a))

    26\sqrt {26}

  2. ((b))

    24\sqrt {24}

  3. ((c))

    6

  4. ((d))

    5

Show Answer
Answer: ((a))

26\sqrt {26}

55

sec 45° - tan 60° = ? 

  1. ((a))

    −3+2 - \sqrt 3 + \sqrt 2

  2. ((b))

    −3−2 - \sqrt 3 - \sqrt 2

  3. ((c))

    32\frac{{\sqrt 3 }}{2}

  4. ((d))

    3+2\sqrt 3 + \sqrt 2

Show Answer
Answer: ((a))

−3+2 - \sqrt 3 + \sqrt 2

56

What is the least number which when doubled is perfectly divisible by 7, 12 and 15? 

  1. ((a))

    420

  2. ((b))

    210

  3. ((c))

    214

  4. ((d))

    220

Show Answer
Answer: ((a))

420

57

A sum of Rs. 10,000 amounts to Rs. 11, 449 in 2 years, when the interest is compounded annually. The interest rate percent per annum is:

  1. ((a))

    6%

  2. ((b))

    1%

  3. ((c))

    7%

  4. ((d))

    8%

Show Answer
Answer: ((a))

6%

58

The ages of X and Y are in the ratio 4 : 7. Three years earlier, the ratio of their ages was 1 : 2. What is the difference between their current ages (Y - X)?

  1. ((a))

    3

  2. ((b))

    6

  3. ((c))

    9

  4. ((d))

    7.5

Show Answer
Answer: ((a))

3

59

What is 80% of 50% of 90?

  1. ((a))

    30

  2. ((b))

    34

  3. ((c))

    32

  4. ((d))

    36

Show Answer
Answer: ((a))

30

60

Choose the figure that is different from the rest.

  1. ((a))

  2. ((b))

  3. ((c))

  4. ((d))

Show Answer
Answer: ((a))

61

A series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.

1.14, 1.28, 1.42, ?, 1.70, 1.84

  1. ((a))

    1.56

  2. ((b))

    1.54

  3. ((c))

    1.68

  4. ((d))

    1.62

Show Answer
Answer: ((a))

1.56

62

Two planes E and F start flying from the same point. E flies 7 km west, then turns to its left and flies 15 km. Meanwhile F flies 11 km east and turns right and flies 15 km. Where is F with respect to E?

  1. ((a))

    F is 18 km west of E

  2. ((b))

    F is 4 km east of E

  3. ((c))

    F is 18 km east of E

  4. ((d))

    F is 4 km west of E

Show Answer
Answer: ((a))

F is 18 km west of E

63

Given below are some letters, that each of these letters has a corresponding number. Select the combination of numbers from the option so that the jumbled letters arranged accordingly will form a meaningful English word.

H T R U O A

1 2 3 4 5 6

  1. ((a))

    6, 4, 2, 1, 5, 3

  2. ((b))

    3, 4, 5, 2, 1, 6

  3. ((c))

    1, 6, 2, 4, 5, 3

  4. ((d))

    2, 1, 5, 3, 4, 6

Show Answer
Answer: ((a))

6, 4, 2, 1, 5, 3

64

I, J, K and L are sitting in a row. L and I are sitting next to each other and I and K are the ends. Who is sitting next to J?

  1. ((a))

    Only K 

  2. ((b))

    L and I

  3. ((c))

    K and L

  4. ((d))

    Only L

Show Answer
Answer: ((a))

Only K 

65

Select the option that is related to the third term in the same way as the second term is related to the first term.

Tall : Short ∷ Glad : ?

  1. ((a))

    Sad

  2. ((b))

    Happy

  3. ((c))

    Emotion

  4. ((d))

    Smile

Show Answer
Answer: ((a))

Sad

66

If, ‘+’ represents ‘×’, ‘-‘ represents ‘+’, ‘×’ represents ‘÷’ and ‘÷’ represents ‘-‘ then find the value of the following expression.

9 × 3 + 6 ÷ 2 = ?

  1. ((a))

    20

  2. ((b))

    10

  3. ((c))

    12

  4. ((d))

    16

Show Answer
Answer: ((a))

20

67

If G + H means G is daughter of H, G- H means G is sister H and G * H means G is husband of H, which of the following shows that I is the daughter of H?

  1. ((a))

    I – J + F * H

  2. ((b))

    I + J - F * H

  3. ((c))

    I – J * F + H

  4. ((d))

    I * J - F + H

Show Answer
Answer: ((a))

I – J + F * H

68

Which of the following Venn diagrams best represents the relationship between Indians, doctors and women?

  1. ((a))

  2. ((b))

  3. ((c))

  4. ((d))

Show Answer
Answer: ((a))

69

Given below are two statement, followed by two conclusion, I and II. You have to consider the statement to be true even if they seem to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follow(s) from the given statements.

Statement 1: No quadrilaterals are polygons.

Statement 2: All polygons are rhombuses.

Conclusion I: Some rhombuses are quadrilaterals.

Conclusion II: Some rhombuses are polygons.

  1. ((a))

    Neither I nor II follows

  2. ((b))

    Only conclusion II follows

  3. ((c))

    Only conclusion I follows

  4. ((d))

    Both I and II follow

Show Answer
Answer: ((a))

Neither I nor II follows

70

Which two signs should be interchanged to make the given equation correct?

9 ÷ 3 + 8 × 2 – 15 = 2

  1. ((a))

    × and -

  2. ((b))

    ÷ and -

  3. ((c))
    • and ×
  4. ((d))
    • and -
Show Answer
Answer: ((a))

× and -

71

What is the minimum number of lines required to make the given image?

  1. ((a))

    13

  2. ((b))

    12

  3. ((c))

    10

  4. ((d))

    9

Show Answer
Answer: ((a))

13

72

A series is give, with one term missing. Choose the correct alternative from the given ones that will complete the series.

OOOOOX, OOOOXX, OOOXXX, OOXXXX, ?

  1. ((a))

    XXXXXX

  2. ((b))

    OOXXXXX

  3. ((c))

    OOXXXX

  4. ((d))

    OXXXXX

Show Answer
Answer: ((a))

XXXXXX

73

If C $ D means C is daughter of D, C & D means C is mother of D and C % D means C is son of D, then what does W $ X & Y % Z mean?

  1. ((a))

    Z is wife of W

  2. ((b))

    Z is mother of W

  3. ((c))

    Z is father of W

  4. ((d))

    Z is daughter of W

Show Answer
Answer: ((a))

Z is wife of W

74

Given below is a question, followed by two arguments, I and II. You have to decide which of the given arguments, if any, is a strong argument, with respect to the question.

Question: Should advertisements be banned on television?

Argument I: Yes, advertisements are immoral.

Argument II: No, advertisements bring in revenue which helps reduce cost for viewers.

  1. ((a))

    Only argument II is strong.

  2. ((b))

    Only argument I is strong.

  3. ((c))

    Neither I nor II is strong.

  4. ((d))

    Both I and II are strong.

Show Answer
Answer: ((a))

Only argument II is strong.

75

Select the option that is related to the third number in the same way as the second number is related to the first number.

-9/11 : 11/9 ∷ 13/2 : ?

  1. ((a))

    3/7

  2. ((b))

    2/13

  3. ((c))

    -2/13

  4. ((d))

    -7/3

Show Answer
Answer: ((a))

3/7

76

Given below is a statement followed by two assumption numbered I and II. You have to decide which of the assumptions is/are implicit in the statement.

Statement: The human body produces Vitamin D when exposed to sunlight.

Assumption I: The human body will have Vitamin D even if it is not consumed via food.

Assumption II: A large portion of the global population suffers from Vitamin D deficiency.

  1. ((a))

    Both I and II are implicit

  2. ((b))

    Only assumption II is implicit

  3. ((c))

    Neither I nor II is implicit

  4. ((d))

    Only assumption I is implicit

Show Answer
Answer: ((a))

Both I and II are implicit

77

A salesperson starts from his office and drives 2 km east, then turns north and drives 7 km, then turns to his right and drives 6 km, then turns south and drives 7 km. Where is he now with respect to his starting position?

  1. ((a))

    8 km east

  2. ((b))

    4 km west

  3. ((c))

    4 km east

  4. ((d))

    8 km west

Show Answer
Answer: ((a))

8 km east

78

Unscramble the letters in the words given below and find the odd word out.

  1. ((a))

    FLOW

  2. ((b))

    ILNO

  3. ((c))

    ERTIG

  4. ((d))

    WCO

Show Answer
Answer: ((a))

FLOW

79

Find the odd group of letters from the given alternatives.

  1. ((a))

    EFG

  2. ((b))

    PQR

  3. ((c))

    VWX

  4. ((d))

    HJL

Show Answer
Answer: ((a))

EFG

80

Choose the figure that is different from the rest.

  1. ((a))

  2. ((b))

  3. ((c))

  4. ((d))

Show Answer
Answer: ((a))

81

In a code language, 295 means ‘water is liquid’, 549 means ‘oil is liquid’ and 824 means ‘oil on water.’ Find the code for ‘on’.

  1. ((a))

    4

  2. ((b))

    2

  3. ((c))

    8

  4. ((d))

    5

Show Answer
Answer: ((a))

4

82

In the following figure, square represents Chinese, triangle represents dancers, circle represents male and rectangle represents architects. Which set of letters represents dancers who are male?

  1. ((a))

    DEIG

  2. ((b))

    DEF

  3. ((c))

    IGH

  4. ((d))

    GEF

Show Answer
Answer: ((a))

DEIG

83

The abbreviation AC in an engineering drawing stands for __________.

  1. ((a))

    Across Corners

  2. ((b))

    Aerial Cut

  3. ((c))

    Attached Circle

  4. ((d))

    Air Conditioning

Show Answer
Answer: ((a))

Across Corners

84

Greater the value of _______ of a material, the more rapidly it will conduct heat. 

  1. ((a))

    melting point

  2. ((b))

    latent heat

  3. ((c))

    regelation

  4. ((d))

    thermal conductivity

Show Answer
Answer: ((a))

melting point

85

The effort applied to move a load is 15 units and the mechanical advantage is observed to be 3. Find the load. 

  1. ((a))

    5 units

  2. ((b))

    3 units

  3. ((c))

    15 units

  4. ((d))

    45 units

Show Answer
Answer: ((a))

5 units

86

What is the unit's digit in 366 × 641 × 753 

  1. ((a))

    8

  2. ((b))

    3

  3. ((c))

    6

  4. ((d))

    7

Show Answer
Answer: ((a))

8

87

If the width of a standard engineering drawing sheet is 841 mm, then its length would be ________ mm. 

  1. ((a))

    1189

  2. ((b))

    1250

  3. ((c))

    1000

  4. ((d))

    1216

Show Answer
Answer: ((a))

1189

88

A 200 g block of iron was heated from 30°C to 60°C. How much heat was transferred to the block (specific heat of iron is 450 Jkg-1K-1)?

  1. ((a))

    6000 J

  2. ((b))

    27 J

  3. ((c))

    2700 J

  4. ((d))

    270 J

Show Answer
Answer: ((a))

6000 J

89

If a machine overcomes a load 'L' and the distance travelled by the load is 'Ld', the work done by the load will be __________.

  1. ((a))

    L × Ld

  2. ((b))

    LLd\rm \frac{L}{Ld}

  3. ((c))

    LdL\rm \frac{Ld}{L}

  4. ((d))

    1L×Ld\rm \frac{1}{L \times Ld}

Show Answer
Answer: ((a))

L × Ld

90

A brass rod (thermal conductivity 109 J/s m K) has an area of cross section 0.04 m2 and length 20 cm. If the two end of the rod are maintained at a temperature difference of 200°C, the rate of heat flow through the rod is ________.

  1. ((a))

    3.42 kJ/s

  2. ((b))

    2.32 kJ/s

  3. ((c))

    4.36 kJ/s

  4. ((d))

    5.80 kJ/s

Show Answer
Answer: ((a))

3.42 kJ/s

91

The effort in a class 1 lever is in __________ direction(s).

  1. ((a))

    three

  2. ((b))

    multiple

  3. ((c))

    two

  4. ((d))

    one

Show Answer
Answer: ((a))

three

92

The velocity ratio of a simple machine is the ratio of distance traveled by the ________ to the distance traveled by the ________ in the machine.

  1. ((a))

    load; load

  2. ((b))

    effort; load

  3. ((c))

    load; effort

  4. ((d))

    effort; effort

Show Answer
Answer: ((a))

load; load

93

If straight lines are drawn from various points on the contour of an object to meet a plane, the figure obtained on the plane is called the _______ of the object. 

  1. ((a))

    development

  2. ((b))

    dimensioning

  3. ((c))

    projection

  4. ((d))

    animation

Show Answer
Answer: ((a))

development

94

A _______ is a theoretical exact plane, axis or point location that GD & T or dimensional tolerances are referenced to. 

  1. ((a))

    flange

  2. ((b))

    frame

  3. ((c))

    section

  4. ((d))

    datum

Show Answer
Answer: ((a))

flange

95

Molar specific heat capacity of a substance is _________.

  1. ((a))

    (1μ)(ΔQΔT)\left(\frac{1}{\mu}\right)\left( \frac{\Delta Q}{\Delta T} \right)

  2. ((b))

    μ(ΔQΔT)\mu \left( \frac{\Delta Q}{\Delta T} \right)

  3. ((c))

    (1μ)(ΔTΔQ)\left(\frac{1}{\mu}\right)\left( \frac{\Delta T}{\Delta Q} \right)

  4. ((d))

    μ(ΔTΔQ)\mu \left( \frac{\Delta T}{\Delta Q} \right)

Show Answer
Answer: ((a))

(1μ)(ΔQΔT)\left(\frac{1}{\mu}\right)\left( \frac{\Delta Q}{\Delta T} \right)

96

In engineering drawing, the letters LH signifies __________.

  1. ((a))

    Level Hide

  2. ((b))

    Left Hand

  3. ((c))

    Low Heat

  4. ((d))

    Limit of Height

Show Answer
Answer: ((a))

Level Hide

97

Identify the material having high coefficient of volume expansion. 

  1. ((a))

    Brass

  2. ((b))

    Alcohol

  3. ((c))

    Glass

  4. ((d))

    Water

Show Answer
Answer: ((a))

Brass

98

An object starts from rest at x = 0 m and moves with a constant acceleration of 1.6 m/s2 along the x-axis. During its journey from x = 12.8 m to x = 20.0 m, its average velocity will be __________.

  1. ((a))

    7.2 m/s

  2. ((b))

    3.6 m/s

  3. ((c))

    8.8 m/s

  4. ((d))

    2.4 m/s

Show Answer
Answer: ((a))

7.2 m/s

99

You are given a question and two statements. Identify which of the statements is/are necessary/sufficient to answer the question.

Question: What was the discount percent offered on the soap by the store?

Statements:

I) The store is giving 1 soap free on purchase of three.

II) Rs. 10 discount is offered on purchase of soap worth 36.

  1. ((a))

    II alone is sufficient while I alone is not sufficient

  2. ((b))

    I alone is sufficient while II alone is not sufficient

  3. ((c))

    Neither I nor II is sufficient

  4. ((d))

    Either I or II is sufficient

Show Answer
Answer: ((a))

II alone is sufficient while I alone is not sufficient

100

Identify the material having low coefficient of volume expansion 

  1. ((a))

    Iron

  2. ((b))

    Mercury

  3. ((c))

    Brass

  4. ((d))

    Aluminium

Show Answer
Answer: ((a))

Iron

Part B (75 questions)

101

In an induction motor, if the air gap is increased

  1. ((a))

    Speed will reduce

  2. ((b))

    Efficiency will improve

  3. ((c))

    Power factor will be lowered

  4. ((d))

    Breakdown torque will reduce

Show Answer
Answer: ((a))

Speed will reduce

102

A feeder, in a transmission system, feeds power to

  1. ((a))

    Distributors 

  2. ((b))

    Service mains 

  3. ((c))

    Substation

  4. ((d))

    All options are correct

Show Answer
Answer: ((a))

Distributors 

103

Iron loss of a transformer can be measured by:

  1. ((a))

    Any type of watt meter

  2. ((b))

    Unity power factor watt meter 

  3. ((c))

    Low power factor watt meter

  4. ((d))

    None of these

Show Answer
Answer: ((a))

Any type of watt meter

104

Which material is used for the construction of the power transformer core?

  1. ((a))

    Mild steel 

  2. ((b))

    High carbon steel

  3. ((c))

    Silicon steel 

  4. ((d))

    Copper

Show Answer
Answer: ((a))

Mild steel 

105

Three-point starter can be used for

  1. ((a))

    Series motor only

  2. ((b))

    Shunt motor only

  3. ((c))

    Both shunt and compound motor

  4. ((d))

    Compound motor only 

Show Answer
Answer: ((a))

Series motor only

106

A common method of cooling a power transformer is

  1. ((a))

    Natural air cooling

  2. ((b))

    Air blast cooling

  3. ((c))

    Oil cooling

  4. ((d))

    Any of the above

Show Answer
Answer: ((a))

Natural air cooling

107

Which among the following, remains same in a series circuit?

  1. ((a))

    Power

  2. ((b))

    Current

  3. ((c))

    Voltage

  4. ((d))

    Resistance

Show Answer
Answer: ((a))

Power

108

The electric motor used in portable drills is __________.

  1. ((a))

    Capacitor run motor

  2. ((b))

    Hysteresis motor

  3. ((c))

    Universal motor

  4. ((d))

    Repulsion motor

Show Answer
Answer: ((a))

Capacitor run motor

109

For transmission and distribution of electrical power, which one of the following materials is NOT used?

  1. ((a))

    Copper

  2. ((b))

    Tungsten

  3. ((c))

    Steel

  4. ((d))

    Aluminium 

Show Answer
Answer: ((a))

Copper

110

The characteristics of patterns that appear on a CRT screen when sinusoidal voltages are simultaneously applied to horizontal and vertical plates are called ________.

  1. ((a))

    Phase patterns

  2. ((b))

    Lissajous patterns

  3. ((c))

    Colour patterns

  4. ((d))

    Eye patterns

Show Answer
Answer: ((a))

Phase patterns

111

 The resistance of an ideal voltmeter is always _____________.

  1. ((a))

    Infinity

  2. ((b))

    Zero

  3. ((c))

    Positive

  4. ((d))

    Negative

Show Answer
Answer: ((a))

Infinity

112

In the current transformer, the number of primary turns is always:

  1. ((a))

    less than the number of secondary turns

  2. ((b))

    zero

  3. ((c))

    greater than the number of secondary turns

  4. ((d))

    equals the number of secondary turns

Show Answer
Answer: ((a))

less than the number of secondary turns

113

Which of the following device is bidirectional?

  1. ((a))

    TRIAC

  2. ((b))

    SCR

  3. ((c))

    GTO

  4. ((d))

    BJT

Show Answer
Answer: ((a))

TRIAC

114

In a three-phase system, the order in which the voltages attain their maximum positive value is called ________.

  1. ((a))

    RMS voltage

  2. ((b))

    peak-to-peak voltage

  3. ((c))

    a phase sequence

  4. ((d))

    power factor

Show Answer
Answer: ((a))

RMS voltage

115

In electrical machines, laminated cores are used to reduce

  1. ((a))

    Copper losses

  2. ((b))

    Eddy current losses

  3. ((c))

    Hysteresis losses

  4. ((d))

    All of the above

Show Answer
Answer: ((a))

Copper losses

116

The average power dissipated in a pure inductor is

  1. ((a))

     Infinite

  2. ((b))

    VI2

  3. ((c))

    VI24\frac{{V{I^2}}}{4}

  4. ((d))

    Zero

Show Answer
Answer: ((a))

 Infinite

117

The condition for maximum efficiency in transformer is

  1. ((a))

    Copper loss = 0

  2. ((b))

    Core loss = 0

  3. ((c))

    Copper loss = Core loss

  4. ((d))

    Copper loss = 2 × Core loss

Show Answer
Answer: ((a))

Copper loss = 0

118

Which of the following is NOT a trivalent impurity?

  1. ((a))

    Boron

  2. ((b))

    Phosphorus

  3. ((c))

    Indium

  4. ((d))

    Gallium

Show Answer
Answer: ((a))

Boron

119

In a Fleming’s right-hand rule, the thumb indicates the:

  1. ((a))

    Direction of current flow

  2. ((b))

    Direction of induced voltage

  3. ((c))

    Direction of motion of conductor

  4. ((d))

    Direction of magnetic field

Show Answer
Answer: ((a))

Direction of current flow

120

The loss that takes place due to winding resistance is called ______.

  1. ((a))

    Iron loss

  2. ((b))

    Hysteresis loss

  3. ((c))

    Eddy current loss

  4. ((d))

    Copper loss

Show Answer
Answer: ((a))

Iron loss

121

The function of inverter in an UPS is to:

  1. ((a))

    Convert DC to AC

  2. ((b))

    Convert AC to DC

  3. ((c))

    Convert DC to DC

  4. ((d))

    Convert AC to AC

Show Answer
Answer: ((a))

Convert DC to AC

122

A DC generator works on the principle of:

  1. ((a))

    Faraday’s law

  2. ((b))

    Steinmetz’s law

  3. ((c))

    Lenz’s law

  4. ((d))

    Ampere’s law

Show Answer
Answer: ((a))

Faraday’s law

123

Choppers are _______ converters.

  1. ((a))

    DC to DC

  2. ((b))

    AC to AC

  3. ((c))

    AC to DC

  4. ((d))

    DC to AC

Show Answer
Answer: ((a))

DC to DC

124

Which of the following material is NOT used as fuse wire?

  1. ((a))

    Copper

  2. ((b))

    Aluminium

  3. ((c))

    Paper

  4. ((d))

    Silver

Show Answer
Answer: ((a))

Copper

125

In which type of power amplifier does the output current flow for the entire cycle of input signal?

  1. ((a))

    Class C

  2. ((b))

    Class AB

  3. ((c))

    Class B

  4. ((d))

    Class A

Show Answer
Answer: ((a))

Class C

126

For an ideal transformer, if I2 / I1 = 2 and E2 = 100 V, E1 will be:

  1. ((a))

    200 V

  2. ((b))

    100 V

  3. ((c))

    25 V

  4. ((d))

    50 V

Show Answer
Answer: ((a))

200 V

127

Power transmission for long distance is carried out at:

  1. ((a))

    High voltage

  2. ((b))

    Low voltage

  3. ((c))

    Low current

  4. ((d))

    High current 

Show Answer
Answer: ((a))

High voltage

128

In the case of direct current:

  1. ((a))

    Magnitude and direction of current changes with time

  2. ((b))

    Magnitude of current changes with time

  3. ((c))

    Magnitude and direction of current remains constant

  4. ((d))

    Magnitude of current remains constant

Show Answer
Answer: ((a))

Magnitude and direction of current changes with time

129

Which of the following protects a cable against mechanical injury?

  1. ((a))

    Bedding

  2. ((b))

    Sheath

  3. ((c))

    Core

  4. ((d))

    Armouring

Show Answer
Answer: ((a))

Bedding

130

In actual practice, the rating of transformer is specified in:

  1. ((a))

    kW

  2. ((b))

    kVA

  3. ((c))

    kVAR

  4. ((d))

    kA

Show Answer
Answer: ((a))

kW

131

In the ______ region, a transistor act as closed switch.

  1. ((a))

    Inverse active region

  2. ((b))

    Saturation

  3. ((c))

    Cut-off region

  4. ((d))

    Active region

Show Answer
Answer: ((a))

Inverse active region

132

For switching applications, a transistor needs to be biased to operate in which of the following regions?

  1. ((a))

    Inverse active region

  2. ((b))

    Active region

  3. ((c))

    Active or inverse active region

  4. ((d))

    Saturation or cut-off region

Show Answer
Answer: ((a))

Inverse active region

133

UJT is used for which of the following applications?

  1. ((a))

    Attenuation

  2. ((b))

    Sawtooth waveform generation

  3. ((c))

    Amplification

  4. ((d))

    Rectification

Show Answer
Answer: ((a))

Attenuation

134

In a DC shunt motor, the torque produced is proportional to:

  1. ((a))

    Armature current

  2. ((b))

    (Armature current)2

  3. ((c))

    Ampere-turn

  4. ((d))

    (Ampere-turn)2

Show Answer
Answer: ((a))

Armature current

135

Which of the following motor is self-starting?

  1. ((a))

    Single-phase induction motor

  2. ((b))

    Low horse power motor

  3. ((c))

    Three-phase induction motor

  4. ((d))

    Variable speed motor

Show Answer
Answer: ((a))

Single-phase induction motor

136

Among the following, which method is NOT preferred to measure low resistances?

  1. ((a))

    Potentiometer method

  2. ((b))

    Ammeter-voltmeter method

  3. ((c))

    Kelvin bridge method

  4. ((d))

    Mega ohm bridge

Show Answer
Answer: ((a))

Potentiometer method

137

Hysteresis loss is given by:

  1. ((a))

    We = K B2maxf2 t2 W

  2. ((b))

    Wh = η Bm1.6 f V  W

  3. ((c))

    Wcu = (I12 R1 + I22 R2) W

  4. ((d))

    Wcu = (I12 R1) W

Show Answer
Answer: ((a))

We = K B2maxf2 t2 W

138

For amplifier application, a transistor needs to be biased to operate in which of the following regions?

  1. ((a))

    Cut-off region

  2. ((b))

    Depletion region

  3. ((c))

    Active region

  4. ((d))

    Saturation region

Show Answer
Answer: ((a))

Cut-off region

139

Among the following, which material is a good conductor of electricity?

  1. ((a))

    Silver

  2. ((b))

    Glass

  3. ((c))

    Porcelain

  4. ((d))

    Rubber

Show Answer
Answer: ((a))

Silver

140

A 3- point starter is used to:

  1. ((a))

    Minimize back emf

  2. ((b))

    Minimize armature current

  3. ((c))

    Maximize armature current

  4. ((d))

    Maximize back emf

Show Answer
Answer: ((a))

Minimize back emf

141

Which of the following two losses are together called core loss?

  1. ((a))

    Connectors loss and transmission loss

  2. ((b))

    Copper loss and hysteresis loss

  3. ((c))

    Eddy current loss and hysteresis loss

  4. ((d))

    Primary copper loss and secondary copper loss

Show Answer
Answer: ((a))

Connectors loss and transmission loss

142

Copper loss is negligible at _____.

  1. ((a))

    Half load

  2. ((b))

    No load

  3. ((c))

    1/4 load

  4. ((d))

    Full load

Show Answer
Answer: ((a))

Half load

143

In lap winding, the number of parallel paths are always:

  1. ((a))

    Same as the number of poles

  2. ((b))

    Half the number of poles

  3. ((c))

    Double the number of poles 

  4. ((d))

    Two

Show Answer
Answer: ((a))

Same as the number of poles

144

Three identical resistors are first connected in a star and then in a delta configuration. The ratio of power consumption in the first combination to the second will be:

  1. ((a))

    1/√3

  2. ((b))

    1

  3. ((c))

    1/3

  4. ((d))

    3

Show Answer
Answer: ((a))

1/√3

145

The complement of (A.B) is:

  1. ((a))

    Complement of A + Complement of B

  2. ((b))

    A.B

  3. ((c))

    A + B

  4. ((d))

    Complement of A . Complement of B

Show Answer
Answer: ((a))

Complement of A + Complement of B

146

If a 4 –pole induction motor has a speed of 1800 rpm, then the frequency at which the motor is operating is:

  1. ((a))

    60 Hz

  2. ((b))

    40 Hz

  3. ((c))

    30 Hz

  4. ((d))

    50 Hz

Show Answer
Answer: ((a))

60 Hz

147

From the following parameters, which parameter’s variation will not affect the capacitance of the capacitor?

  1. ((a))

    Thickness of the plates

  2. ((b))

    Distance between the plates 

  3. ((c))

    Nature of the dielectric

  4. ((d))

    Area of the plates

Show Answer
Answer: ((a))

Thickness of the plates

148

The input power of an electric heater that draws 10 A at 230 V supply source is:

  1. ((a))

    230 W

  2. ((b))

    2300 W

  3. ((c))

    23 W

  4. ((d))

    0 W

Show Answer
Answer: ((a))

230 W

149

Conduit elbows are usually located at:

  1. ((a))

    The tappings of the connection

  2. ((b))

    Away from walls

  3. ((c))

    Straight runs

  4. ((d))

    Sharp ends

Show Answer
Answer: ((a))

The tappings of the connection

150

Three Identical bulbs are connected in series and these together dissipate power ‘M’. If now the bulbs are connected in parallel, then the power dissipated will be:

  1. ((a))

    M/3

  2. ((b))

    3M

  3. ((c))

    9M

  4. ((d))

    m/9

Show Answer
Answer: ((a))

M/3

151

Overheating of DC motors is mainly due to:

  1. ((a))

    Rough commutator 

  2. ((b))

    Overloads 

  3. ((c))

    Loose parts

  4. ((d))

    Absence of brushes

Show Answer
Answer: ((a))

Rough commutator 

152

Which of the following is a valid grade for which electric cables are commercially manufactured?

  1. ((a))

    230/400V

  2. ((b))

    100/200V

  3. ((c))

    270/300V

  4. ((d))

    50/100V

Show Answer
Answer: ((a))

230/400V

153

A three-phase power system with three voltages EA, EB and EC have an equal magnitude and are displaced at ____ from each other.

  1. ((a))

    100° 

  2. ((b))

    180°

  3. ((c))

     90°

  4. ((d))

    120°

Show Answer
Answer: ((a))

100° 

154

An SCR consists of:

  1. ((a))

    Three PN junction

  2. ((b))

    One PN junction

  3. ((c))

    Two PN junction

  4. ((d))

    No PN junction

Show Answer
Answer: ((a))

Three PN junction

155

The expression for inductive reactance (XL) of an AC circuit is:

  1. ((a))

    2πL

  2. ((b))

    2πfL

  3. ((c))

    12πfL \frac{1}{{2π fL}}

  4. ((d))

    2πf

Show Answer
Answer: ((a))

2πL

156

Among the following, which feature is best suited for insulating materials?   

  1. ((a))

    Low melting point 

  2. ((b))

    Good current conductivity

  3. ((c))

    High dielectric strength 

  4. ((d))

    Low mechanical strength

Show Answer
Answer: ((a))

Low melting point 

157

Hysteresis loss can be minimized by selecting a material for the core that has:

  1. ((a))

    Low hysteresis coefficient

  2. ((b))

    Low transmission coefficient

  3. ((c))

    Unit hysteresis coefficient

  4. ((d))

    High hysteresis coefficient

Show Answer
Answer: ((a))

Low hysteresis coefficient

158

Which one of the following motors is identical to an induction motor?

  1. ((a))

    Synchronous motor

  2. ((b))

    DC series motor

  3. ((c))

    DC compound motor

  4. ((d))

    Asynchronous motor

Show Answer
Answer: ((a))

Synchronous motor

159

The ripple factor for a full-wave rectifier with capacitor is given by:

  1. ((a))

    143fRL \frac{1}{{4\sqrt 3 f{R_L}}}

  2. ((b))

    123fCRL \frac{1}{{2\sqrt 3 fC{R_L}}}

  3. ((c))

    143fCRL \frac{1}{{4\sqrt 3 fC{R_L}}}

  4. ((d))

    143fC \frac{1}{{4\sqrt 3 fC{}}}

Show Answer
Answer: ((a))

143fRL \frac{1}{{4\sqrt 3 f{R_L}}}

160

In a capacitor start single-phase motor, the motor will continue to run in same direction if the capacitor is replaced by a:

  1. ((a))

    Resistor and inductor 

  2. ((b))

    Inductor 

  3. ((c))

    None of these

  4. ((d))

    Resistor 

Show Answer
Answer: ((a))

Resistor and inductor 

161

Power consumed in a series RLC circuit can be calculated using:

  1. ((a))

    P = VI cosφ

  2. ((b))

    P = VI

  3. ((c))

    P = IR

  4. ((d))

    P = IR cos φ 

Show Answer
Answer: ((a))

P = VI cosφ

162

Three resistances of 2 ohms, 3 ohms and 6 ohms are connected in parallel. The total resistance of the combination is:

  1. ((a))

    11 ohms

  2. ((b))

    1 ohm

  3. ((c))

    36 ohms

  4. ((d))

    3 ohm

Show Answer
Answer: ((a))

11 ohms

163

If the voltage drop across individual resistors R1, R2  and R3  connected to a battery are 10 V, 20 V and 30 V respectively. Then the total battery voltage is:

  1. ((a))

    20 V

  2. ((b))

    30 V

  3. ((c))

    60 V

  4. ((d))

    Zero

Show Answer
Answer: ((a))

20 V

164

A circuit in which resistances are connected end to end so that there is only one path for current to flow is called a _____.

  1. ((a))

    Neither series nor parallel circuit

  2. ((b))

    Series-parallel circuit

  3. ((c))

    Series circuit

  4. ((d))

    Parallel circuit 

Show Answer
Answer: ((a))

Neither series nor parallel circuit

165

In a series R-C circuit, the AC current is:

  1. ((a))

    Lagging behind the applied voltage

  2. ((b))

    Leading the applied voltage

  3. ((c))

    Out of phase with applied voltage

  4. ((d))

    In phase with the applied voltage 

Show Answer
Answer: ((a))

Lagging behind the applied voltage

166

A transformer transfers which of the following parameters?

  1. ((a))

    Current

  2. ((b))

    Frequency

  3. ((c))

    Voltage

  4. ((d))

    Both 1 & 3

Show Answer
Answer: ((a))

Current

167

In the _____ region, a transistor act as an open switch.

  1. ((a))

    Active Region

  2. ((b))

    Saturation

  3. ((c))

    Cut-off region

  4. ((d))

    Inverse active region

Show Answer
Answer: ((a))

Active Region

168

If a resistance of 10 ohms and a capacitance of 1 μF is connected across a 230 V, 50 Hz AC supply, the capacitive reactance of the circuit is 

  1. ((a))

    31.83 Ω 

  2. ((b))

    3.183 Ω

  3. ((c))

    0.0318 Ω

  4. ((d))

    3183 Ω

Show Answer
Answer: ((a))

31.83 Ω 

169

The ripple factor for a half-wave rectifier with capacitor is given by:

  1. ((a))

    ​r=13fCRLr=\frac{1}{{\sqrt 3 fC{R_L}}}

  2. ((b))

    r=143fRLr=\frac{1}{{4\sqrt 3 f{R_L}}}

  3. ((c))

    r=143fCRLr=\frac{1}{{4\sqrt 3 fC{R_L}}}

  4. ((d))

    r=123fCRLr=\frac{1}{{2\sqrt 3 fC{R_L}}}

Show Answer
Answer: ((a))

​r=13fCRLr=\frac{1}{{\sqrt 3 fC{R_L}}}

170

In a balanced three-phase star connected system, if the line current is 30 A, then its phase current is:

  1. ((a))

    15 A

  2. ((b))

    17.3 A

  3. ((c))

    30 A

  4. ((d))

    51.9 A

Show Answer
Answer: ((a))

15 A

171

What is the surge impedance of cable?

  1. ((a))

    5 Ω 

  2. ((b))

    20 Ω

  3. ((c))

    10 Ω

  4. ((d))

    50 Ω

Show Answer
Answer: ((a))

5 Ω 

172

Conductance is defined as reciprocal of:

  1. ((a))

    Resistance

  2. ((b))

    Capacitance

  3. ((c))

    Susceptance

  4. ((d))

    Inductance 

Show Answer
Answer: ((a))

Resistance

173

The unit of sensitivity of an instrument is:

  1. ((a))

    ampere/sec

  2. ((b))

    volt/ohm

  3. ((c))

    volt-amp

  4. ((d))

    ohm/volt 

Show Answer
Answer: ((a))

ampere/sec

174

Form factor is the ratio of

  1. ((a))

    Average value to peak value

  2. ((b))

    Peak value to Average value

  3. ((c))

    Average value to RMS value

  4. ((d))

    RMS value to Average value 

Show Answer
Answer: ((a))

Average value to peak value

175

Peak inverse voltage for a full wave rectifier is

  1. ((a))

    Em

  2. ((b))

    2Em

  3. ((c))

    3Em

  4. ((d))

    4Em

Show Answer
Answer: ((a))

Em

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