Official Paper

RRB ALP Electronics Mechanic 23 Jan 2019 Official Paper (Shift 1) (Previous Year Paper)

175 questions · 150 minutes · with answers · free

Attempt as Timed Mock Test

Part A (100 questions)

What is the diameter (in cm) of a sphere of surface area 1386 cm²?

((a))
14
((b))
21
((c))
10.5
((d))
24.5

Show Answer

Answer: ((a))

The bar graph shows the population density of 6 countries in 2000 and 2010.

If the population of country B is 10 million in 2000 and the population of country D is 6 million in 2010, how much more is the area of country B than the area of country D, where population density is measured as the number of people per 100 square kilometers.

((a))
500%
((b))
20%
((c))
400%
((d))
25%

Show Answer

Answer: ((a))

500%

The bar graph shows all the ingredients (in grams) required to make two types of salads, X and Y. If Ingredient B of Salad X is reduced by 100 grams and Ingredient E of salad Y is increased by 25% then salad Y would be lighter than salad X by _______.

((a))
37.50%
((b))
25%
((c))
20%
((d))
22.50%

Show Answer

Answer: ((a))

37.50%

In a steady-flowing river, a boat goes a certain distance upstream at a speed of 12 km/h and comes back the same distance at 24 km/h. Find the average speed for the total journey.

((a))
15 km/h
((b))
16 km/h
((c))
18 km/h
((d))
20 km/h

Show Answer

Answer: ((a))

15 km/h

Find mass of an iron cube of side 2 cm. (Density of iron is 7.8 gm/cm³)

((a))
3.9 gm
((b))
0.975 gm
((c))
15.6 gm
((d))
62.4 gm

Show Answer

Answer: ((a))

3.9 gm

Two cars, X and Y, travel from A to B at average speeds of 50 km/hr and 75 km/hr respectively. If X takes 2 hours more than Y for the journey, then the distance between A and B in km is ______.

((a))
600
((b))
400
((c))
800
((d))
300

Show Answer

Answer: ((a))

600

If a shopkeeper sells an item at Rs. 2,700, he makes 8% profit. If he sells the item at Rs. 3,000 what will be the percentage of profit?

((a))
12
((b))
20
((c))
10
((d))
25

Show Answer

Answer: ((a))

Find the highest common factor of 506 and 782.

((a))
29
((b))
34
((c))
46
((d))
22

Show Answer

Answer: ((a))

A alone can do a task in 35 days and B alone in 14 days. If they work on it together for 5 days, then what fraction of the task is left?

((a))
Quarter
((b))
One-thirds
((c))
Half
((d))
Three fourths

Show Answer

Answer: ((a))

Quarter

(0.1² - 0.025²) ÷ (0.1 - 0.025) = ______.

((a))
0.325
((b))
0.125
((c))
0.625
((d))
0.25

Show Answer

Answer: ((a))

0.325

Find the coordinates of the midpoint of the segment joining the points (-4, 7) and (2, 3).

((a))
(-1, 5)
((b))
(-2, 3)
((c))
(1, -5)
((d))
(2, 4)

Show Answer

Answer: ((a))

(-1, 5)

20 - 2[25% of (15 × 8 ÷ 6 + 12)] = ______

((a))
4
((b))
6
((c))
10
((d))
8

Show Answer

Answer: ((a))

If a - b = 5 and ab = 14, then find a² + b².

((a))
53
((b))
27
((c))
5
((d))
19

Show Answer

Answer: ((a))

Find the value of 5 sin θ - 2 cosec θ, if θ = 30°.

((a))
3/2
((b))
- 3/2
((c))
2/3
((d))
- 2/3

Show Answer

Answer: ((a))

3/2

In a certain gear train, the driver has 18 teeth while the follower has 8 teeth. For every 16 turns of the driver, the follower turns ______ times.

((a))
18
((b))
8
((c))
36
((d))
9

Show Answer

Answer: ((a))

If 5x/2 - 1/4(6x - 5/3) = 7/6, then the value of x is ______.

((a))
5/4
((b))
3/4
((c))
3/7
((d))
5/7

Show Answer

Answer: ((a))

5/4

If the amount received at the end of 1^st and 2^nd year at compound interest on a certain principal is Rs. 1,350 and Rs. 1,458 respectively, what is the rate of interest?

((a))
10%
((b))
15%
((c))
12%
((d))
8%

Show Answer

Answer: ((a))

10%

A trader buys 60 bags of grain at Rs. 400 each. If he sells 18 bags at 8% profit, at what price should he sell the remaining bags to make 16.4% overall profit on selling the 60 bags?

((a))
Rs. 480
((b))
Rs. 500
((c))
Rs. 540
((d))
Rs. 520

Show Answer

Answer: ((a))

Rs. 480

If A, B and C can do a task working alone in 12, 18 and 36 days respectively. They all work together for 2 days, then B quits. How many days A and C working together will take to complete the remainder of the task?

((a))
6
((b))
3
((c))
4
((d))
9

Show Answer

Answer: ((a))

What is the area (in cm²) of an equilateral triangle of side 8 cm?

((a))
32√3
((b))
8√3
((c))
64√3
((d))
16√3

Show Answer

Answer: ((a))

32√3

A and B start to walk from point P towards point Q. The distance between P and Q is 9 km. B starts 4 minutes after A. A, on reaching Q, immediately returns and after walking a kilometre meets B. If A’s speed is a kilometre in 10 minutes, what is B’s speed in kilometres per minute?

((a))
1/15
((b))
1/8
((c))
1/12
((d))
1/6

Show Answer

Answer: ((a))

1/15

Pipe A can fill a tank in 6 hours. Pipe B can empty it in 15 hours. If both the pipes are opened together, then the tank will be filled in how many hours?

((a))
9
((b))
8
((c))
12
((d))
10

Show Answer

Answer: ((a))

When a number is increased by 36, it becomes 109% of itself. What is the number?

((a))
300
((b))
450
((c))
360
((d))
400

Show Answer

Answer: ((a))

300

A bullet travels 90 m in 0.2 seconds. Find its speed in km/hr.

((a))
162
((b))
1,620
((c))
1,250
((d))
125

Show Answer

Answer: ((a))

162

An executive earns a salary of Rs. 12,600 every month, and he spends 5/7 of it. If his salary increases by 1/3^rd and his spending increases by 1/5^th of the present expenditure, what fraction of his salary will he save?

((a))
7/16
((b))
8/15
((c))
7/15
((d))
5/14

Show Answer

Answer: ((a))

7/16

If 3A = 6B = 7C; find A : B : C.

((a))
12 : 7 : 3
((b))
7 : 12 : 6
((c))
14 : 7 : 6
((d))
7 : 3 : 12

Show Answer

Answer: ((a))

12 : 7 : 3

Find x if the mean of the numbers 10, 4, 1, 15, 15, x, 12 and 14 is 10.

((a))
7
((b))
8
((c))
9
((d))
10

Show Answer

Answer: ((a))

If √X + 0.24 = √0.1296 then find X.

((a))
0.0144
((b))
0.12
((c))
1.44
((d))
0.0012

Show Answer

Answer: ((a))

0.0144

The weights of 3 boxes are 4, 7 and 10 kilograms. Which of the following CANNOT be the total weight, in kilograms, of any combination of these boxes?

((a))
14
((b))
21
((c))
17
((d))
18

Show Answer

Answer: ((a))

The author of ‘The Monk Who Sold His Ferrari’ is ______.

((a))
Arvind Adiga
((b))
Robin Sharma
((c))
Manohar Malgonkar
((d))
Arundhati Roy

Show Answer

Answer: ((a))

Arvind Adiga

Find the work done (in kJ) if a force of 750 N pushes a cart of mass 30 kg by 16 m.

((a))
24
((b))
12
((c))
36
((d))
48

Show Answer

Answer: ((a))

Which hazardous substance can cause lung cancer?

((a))
Benzene vapours
((b))
Asbestos particles
((c))
Herbicides
((d))
Aluminum

Show Answer

Answer: ((a))

Benzene vapours

______ is the physiological adjustment by an organism to environmental change.

((a))
Bioremediation
((b))
Bioaccumulation
((c))
Cogeneration
((d))
Acclimation

Show Answer

Answer: ((a))

Bioremediation

Which of the following gases is a highly poisonous, odourless, tasteless and colourless gas?

((a))
Carbon dioxide
((b))
Carbon monoxide
((c))
Methane
((d))
Nitrogen dioxide

Show Answer

Answer: ((a))

Carbon dioxide

Green and yellow vegetables in our diet mostly provide us which element as food?

((a))
Copper
((b))
Sodium
((c))
Zinc
((d))
Potassium

Show Answer

Answer: ((a))

Copper

Binary 110110101 is equal to decimal ________.

((a))
333
((b))
437
((c))
349
((d))
477

Show Answer

Answer: ((a))

333

A/An ______ is software used to maintain the security of a private network.

((a))
malware
((b))
encryption
((c))
firewall
((d))
clickbait

Show Answer

Answer: ((a))

malware

Who was the chairman of the Constitution Drafting Committee?

((a))
Jawaharlal Nehru
((b))
Dr. B R Ambedkar
((c))
Dr. Rajendra Prasad
((d))
Sardar Patel

Show Answer

Answer: ((a))

Jawaharlal Nehru

The Umaid Bhawan Palace is in which city?

((a))
Jaipur
((b))
Jodhpur
((c))
Bikaner
((d))
Udaipur

Show Answer

Answer: ((a))

Jaipur

Classical musician Shivkumar Sharma is associated with which musical instrument?

((a))
Shehnai
((b))
Tabla
((c))
Violin
((d))
Santoor

Show Answer

Answer: ((a))

Shehnai

Which of the following folk dances is from Assam?

((a))
Giddha
((b))
Lezim
((c))
Nati
((d))
Bagurumba

Show Answer

Answer: ((a))

Giddha

-100° Celsius = ______ Fahrenheit

((a))
-373°
((b))
-148°
((c))
173°
((d))
-212°

Show Answer

Answer: ((a))

-373°

If 36 J of work is done in moving a charge Q across 8 V, find Q (in coulombs).

((a))
288
((b))
9
((c))
4.5
((d))
16

Show Answer

Answer: ((a))

288

What is the relative density of a solid of mass 50 gm which when fully immersed in water weighs 10 gm?

((a))
5
((b))
1.25
((c))
2.5
((d))
0.8

Show Answer

Answer: ((a))

If the speed of a car increases from 54 km/hr to 90 km/hr, its kinetic energy increases in the ratio of ________.

((a))
3/5
((b))
9/4
((c))
9/16
((d))
9/25

Show Answer

Answer: ((a))

3/5

Find the length (in cm) of the edge of a cube of a piece of wood which weighs 80 N. (Use g = 10 m/s², density of wood = 1 g/cm³)

((a))
60
((b))
20
((c))
80
((d))
40

Show Answer

Answer: ((a))

Two resistors of R Ω and 60 Ω are connected in parallel to get an effective resistance of 24 Ω. Find R.

((a))
56
((b))
64
((c))
48
((d))
40

Show Answer

Answer: ((a))

Farad per meter is the unit of ______.

((a))
watt per steradian
((b))
permittivity
((c))
permeability
((d))
electric conductance

Show Answer

Answer: ((a))

watt per steradian

A ______ map converts color intensity or grayscale information to heights to give the appearance that features are raised above the surface, like embossed letters.

((a))
shade
((b))
bump
((c))
tone
((d))
tint

Show Answer

Answer: ((a))

shade

A truck of mass 5000 kg accelerates from 25 m/s to 35 m/s. Find the change in its kinetic energy (in MJ).

((a))
1
((b))
2.5
((c))
1.5
((d))
2

Show Answer

Answer: ((a))

Which of the following recipients of the Dadasaheb Phalke Award received it posthumously?

((a))
Vinod Khanna
((b))
Satyajit Ray
((c))
Naushad
((d))
Durga Khote

Show Answer

Answer: ((a))

Vinod Khanna

To ______ is to prepare a storage medium, usually a disk, for reading and writing.

((a))
format
((b))
defrag
((c))
map
((d))
boot

Show Answer

Answer: ((a))

format

Which of the following is the correct relation between resistance ‘R’, conductivity ‘σ’, length ‘L’ and area of cross section ‘A’ of a metal wire?

((a))
RL = Aσ
((b))
RσA = L
((c))
RA = Lσ
((d))
σ = RL/A

Show Answer

Answer: ((a))

RL = Aσ

Which team won the Indian Premier League (IPL) in 2018?

((a))
Sunrisers Hyderabad
((b))
Chennai Super Kings
((c))
Royal Challengers Bangalore
((d))
Kolkata Knight Riders

Show Answer

Answer: ((a))

Sunrisers Hyderabad

Antihistamines are found in some first-aid boxes. When should these drugs be taken?

((a))
To aid in clotting of blood
((b))
To ease the symptoms of hay fever and other allergies
((c))
To ease the indigestion and heartburn
((d))
To bring relief from asthma

Show Answer

Answer: ((a))

To aid in clotting of blood

Acceleration due to gravity on moon is 1/6^th that on earth. How much would an astronaut weigh on the moon if he weighs 90 kgf on earth? (acceleration due to gravity on earth = 10 m/s²)

((a))
15 N
((b))
150 N
((c))
90 N
((d))
9 N

Show Answer

Answer: ((a))

15 N

Which of the following is NOT a base unit?

((a))
mole
((b))
ampere
((c))
radian
((d))
candela

Show Answer

Answer: ((a))

mole

Who invented the blue jeans?

((a))
Levi Strauss
((b))
Todd Oldham
((c))
Calvin Klein
((d))
Gianni Versace

Show Answer

Answer: ((a))

Levi Strauss

Find the potential difference (in V) across a resistance of 2.5 kΩ through which a 2 mA current flows.

((a))
5
((b))
0.2
((c))
1.25
((d))
0.8

Show Answer

Answer: ((a))

The Living Planet Report, released every two years, is the flagship publication of which organisation?

((a))
The Nature Conservancy
((b))
World Wide Fund for Nature
((c))
Conservation International
((d))
Wildlife Conservation Society

Show Answer

Answer: ((a))

The Nature Conservancy

The sum of two binary numbers 1101111 and 1100101 is ______.

((a))
100011100
((b))
100000110
((c))
11110000
((d))
11010100

Show Answer

Answer: ((a))

100011100

The National Skills Development Corporation (NSDC) is a public-private partnership formed under India’s ______.

((a))
Ministry of Finance
((b))
Ministry of Electronics & Information Technology
((c))
Ministry of Corporate Affairs
((d))
Ministry of Science & Technology

Show Answer

Answer: ((a))

Ministry of Finance

The resistance of a metal rod depends on all of the following, except ______.

((a))
resistivity
((b))
density
((c))
length
((d))
temperature

Show Answer

Answer: ((a))

resistivity

Find the missing number in the given series.

-1.3, -0.8, -0.3, ?, 0.7, 1.2

((a))
0.1
((b))
0.3
((c))
0.4
((d))
0.2

Show Answer

Answer: ((a))

0.1

One statement is given, followed by two assumptions, I & II. You have to consider the statement to be true, even if it seems to be at variance from commonly known facts. You are to decide which of the given assumptions can definitely be drawn from the given statement.

Statement: “You are appointed as a trainee accountant on temporary basis. Your employment status will automatically be converted to permanent on submission of pass result of M Com final exam." — Extract from an appointment letter.

Assumptions:

I. M Com final exam is a reasonable proof of an accountant's capability.

II. All trainees are appointed on temporary basis.

((a))
Both I and II are implicit
((b))
Only assumption I is implicit
((c))
Only assumption II is implicit
((d))
Neither I nor II is implicit

Show Answer

Answer: ((a))

Both I and II are implicit

Choose the figure which is different from the rest.

((a))
((b))
((c))
((d))

Show Answer

Answer: ((a))

In a certain code language, ‘+’ represents ‘×’, ‘÷’ represents ‘+’, ‘-’ represents ‘÷’ and ‘×’ represents ‘-’. Find out the answer to the following question.

12 ÷ 6 – 2 + 10 × 5 = ?

((a))
50
((b))
37
((c))
23
((d))
16

Show Answer

Answer: ((a))

In the following figure, the triangle represents actors, the square represents professors, the circle represents Indians and the rectangle represents fathers. Which set of letters represents Indians who are either professors or fathers?

((a))
IGH
((b))
CEF
((c))
E
((d))
G

Show Answer

Answer: ((a))

IGH

Choose the letters which are different from the rest.

((a))
HJL
((b))
PRT
((c))
VTR
((d))
UWY

Show Answer

Answer: ((a))

HJL

Select the option that is related to the third word on the same basis as the second word is related to the first word.

Letter : Envelope ∷ Dagger : ?

((a))
Sheath
((b))
Weapon
((c))
Sword
((d))
Sharp

Show Answer

Answer: ((a))

Sheath

If A $ B means A is the husband of B, A # B means A is the brother of B and A * B means A is the mother of B, then what does P $ Q * R # S mean?

((a))
P is the father of S
((b))
P is the brother-in-law of S
((c))
P is the son of S
((d))
P is the brother of S

Show Answer

Answer: ((a))

P is the father of S

What is the angle between the hour hand and the minute hand at half past two?

((a))
105°
((b))
75°
((c))
120°
((d))
90°

Show Answer

Answer: ((a))

105°

The given Venn diagram shows the number of students who have passed in the three exams, viz. English, Science and Maths. How many students failed in all the three exams?

((a))
3
((b))
12
((c))
9
((d))
6

Show Answer

Answer: ((a))

One statement is given followed by two conclusions. Decide which of the given conclusions can definitely be drawn from the given statement.

Statement: As income increases, cars become more affordable.

Conclusion I: With greater use of technology, cars are now cheaper than they were a generation ago.

Conclusion II: Cars will become so numerous that no future technology will solve the traffic problem.

((a))
Only conclusion I follows
((b))
Both I and II follow
((c))
Neither I nor II follows
((d))
Only conclusion II follows

Show Answer

Answer: ((a))

Only conclusion I follows

A postman starts from the post office and cycles 13 km south, then turns west and cycles 10 km, then turns north and cycles 8 km, then turns east and cycles 2 km and then turns to his left and cycles 5 km. Where is he now with reference to his starting position?

((a))
8 km east
((b))
12 km east
((c))
12 km west
((d))
8 km west

Show Answer

Answer: ((a))

8 km east

Here are some words from an artificial language.

unacri means lighthouse

bancri means lightweight

banetu means overweight

Which word would mean ‘overdrive’?

((a))
adiban
((b))
adietu
((c))
simuna
((d))
criteh

Show Answer

Answer: ((a))

adiban

At present, the ratio between the ages of Anu and Dimpy is 5 : 8. After 2 years, the ratio of their ages will become 2 : 3. What was Dimpy’s age before 2 years?

((a))
10
((b))
12
((c))
16
((d))
14

Show Answer

Answer: ((a))

In the question, two statements are given, followed by three conclusions, I, II and III. You have to consider the statements to be true even if they seem to be at variance with commonly known facts. You have to decide which of the given conclusions, if any, follows from the given statements.

Statement:

All flags are banners.

Some flags are emblems.

Conclusion:

I. Some emblems are banners.

II. All banners are emblems.

III.No emblems are banners.

((a))
Only conclusion I follows
((b))
Only conclusion III follows
((c))
All conclusions I, II and III follow
((d))
Only conclusion I and III follow

Show Answer

Answer: ((a))

Only conclusion I follows

Choose the one which is different from the rest.

((a))
Father
((b))
Son
((c))
Mother-in-law
((d))
Brother

Show Answer

Answer: ((a))

Father

Select the option that is related to the third word on the same basis as the second word is related to the first word.

Poem : Stanza ∷ Book : ?

((a))
Language
((b))
Story
((c))
Page
((d))
Printing

Show Answer

Answer: ((a))

Language

If 8 # 12 = 10; 5 # 9 = 7; 6 # 10 = 8, then find the value of 14 # 4.

((a))
10
((b))
9
((c))
5
((d))
3

Show Answer

Answer: ((a))

In a certain code DIRTY is coded as 24759 and FOAM is coded as 1863. Using the same code ARID will be coded as ______.

((a))
2489
((b))
9165
((c))
1579
((d))
6742

Show Answer

Answer: ((a))

2489

In the following question, which set of letters and numbers, when sequentially placed at the gaps in the given series, shall complete it?

1_2x_bb_yy_cc_6zzz

((a))
a345c
((b))
3a45b
((c))
3a4b5
((d))
3a45c

Show Answer

Answer: ((a))

a345c

A said to B, “You are my husband’s daughter-in-law’s son.” How is B related to A?

((a))
B is the father of A
((b))
B is the grandson of A
((c))
B is the brother of A
((d))
B is the son of A

Show Answer

Answer: ((a))

B is the father of A

In the question, two statements are given, followed by two conclusions, I, and II. You have to consider the statements 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, follows from the given statements.

Statement 1: Some wagons are buggies.

Statement 2: All wagons are carts.

Conclusion I: All buggies are carts.

Conclusion II: Some carts are buggies.

((a))
Only conclusion I follows
((b))
Both I and II follow
((c))
Neither I nor II follows
((d))
Only conclusion II follows

Show Answer

Answer: ((a))

Only conclusion I follows

Rearrange the parts of the sentence in the correct order.

A customer based on reasons

X- chances are that they actually made the change

Y- may not come out of the changing room, but

Z- which is unfortunately inappropriate

((a))
YXZ
((b))
ZYX
((c))
XZY
((d))
ZXY

Show Answer

Answer: ((a))

YXZ

Find the power (in W) of a pump if it can lift 1 tonne of water by 90 m in 30 minutes. (Assume 100% efficiency and use g= 10 m/s²)

((a))
50
((b))
250
((c))
25
((d))
500

Show Answer

Answer: ((a))

Which of the following is an example of a first class lever?

((a))
Ice tongs
((b))
Wheel barrow
((c))
A pair of scissors
((d))
Nut cracker

Show Answer

Answer: ((a))

Ice tongs

_______ curves employ at least three points to define a curve. The two endpoints of the curve are called anchor points. The other points, which define the shape of the curve, are called handles, tangent points, or nodes.

((a))
Bicorn
((b))
Bezier
((c))
Deltoid
((d))
Kappa

Show Answer

Answer: ((a))

Bicorn

Find the efficiency of a pulley system which has a mechanical advantage of 2.5 and where the load lifts by 2.5 meters on pulling the rope by 10 m.

((a))
62.50%
((b))
25.00%
((c))
40.00%
((d))
100.00%

Show Answer

Answer: ((a))

62.50%

________ is when we cover a surface with a pattern of flat shapes so that there are no overlaps or gaps.

((a))
Tessellation
((b))
Tracking
((c))
Gradient
((d))
Kerning

Show Answer

Answer: ((a))

Tessellation

If half a litre of hot water at 90°C is mixed with three and a half litres of cold water at 10° C, find the final equilibrium temperature (in °C) if no heat is lost.

((a))
20
((b))
40
((c))
30
((d))
50

Show Answer

Answer: ((a))

Two children, weighing 30 kg and 15 kg, sit on one side of a see-saw at a distance of 1 m and 1.2 m respectively, from the fulcrum. A boy of 'M' kg sits on the other side of the see-saw at a distance of 1.2 m from the fulcrum, and the see- saw is in equilibrium. Find M.

((a))
36
((b))
45
((c))
48
((d))
40

Show Answer

Answer: ((a))

Find the heat capacity of a pan of mass 200 g, if its temperature rises by 8° C on receiving 2000 J of heat.

((a))
250 JK^-1
((b))
5 JK^-1
((c))
50 Jkg^-1K^-1
((d))
1.25 Jkg^-1K^-1

Show Answer

Answer: ((a))

250 JK^-1

210 mm × 297 mm are the dimensions of ______ size paper.

((a))
A4
((b))
A2
((c))
A3
((d))
A1

Show Answer

Answer: ((a))

The sentences given in the question, which, when properly sequenced, form a coherent paragraph. Each sentence is labelled with a letter. Choose the most logical order of sentences from among the given choices to construct a coherent paragraph.

Outside their window there was a vine with attractive foliage, but it started shedding leaves one by one as summer passed through fall into winter.

A - Came dawn, when Johnsy looked out of the window from her sick bed, lo and behold, the leaf was still there and it continued to be there on the following days.

B - Finally, only one last leaf remained. Johnsy told Sue that when that leaf fell, her life would also go.

C - The girl regained her will to live and was fully recovered in a few days.

D - A concerned elderly artist friend of the girls, hearing this story, climbed outside the window in the bitterly cold night and painted a life-like leaf at the spot from where the last leaf had just fallen.

((a))
BDCA
((b))
BDAC
((c))
DBCA
((d))
DBAC

Show Answer

Answer: ((a))

BDCA

An object with greater ______ has greater inertia.

((a))
velocity
((b))
acceleration
((c))
volume
((d))
mass

Show Answer

Answer: ((a))

velocity

Find the specific heat capacity (in Jg^-1K^-1) of a block of metal of mass 500 g, the temperature of which rises by 80°C when it absorbs 10 kJ of heat?

((a))
0.4
((b))
0.16
((c))
1.56
((d))
0.25

Show Answer

Answer: ((a))

0.4

Find the specific latent heat of vaporisation of 1.25 g of nitrogen (in Jg^-1), if it releases 250 Joules of heat when it condenses at its boiling point of 196° C.

((a))
469
((b))
500
((c))
312.5
((d))
200

Show Answer

Answer: ((a))

469

100

An arrowhead at the end of a dimension line is approximately _________ long and 1 mm wide.

((a))
3 mm
((b))
5 mm
((c))
1 mm
((d))
1.5 mm

Show Answer

Answer: ((a))

3 mm

Part B (75 questions)

101

A unijunction transistor (UJT) is used to ________

((a))
boost the SCR
((b))
amplify DC
((c))
boost and trigger TRIAC
((d))
trigger the SCR

Show Answer

Answer: ((a))

boost the SCR

102

Secondary cells _______

((a))
can be recharged and reused
((b))
can be charged but cannot be reused
((c))
cannot be recharged
((d))
cannot be charged and reused

Show Answer

Answer: ((a))

can be recharged and reused

103

An Inductive Reactance function:

((a))
opposes alternating current
((b))
opposes direct current
((c))
allows alternating current
((d))
allows alternating current and direct current.

Show Answer

Answer: ((a))

opposes alternating current

104

If a diode shows equal resistance but not zero in both directions then the diode must be ____.

((a))
short
((b))
defective
((c))
working fine
((d))
open

Show Answer

Answer: ((a))

short

105

A Hartley oscillator is commonly used in ____.

((a))
Radio Receivers
((b))
Radio Transmitters
((c))
TV Receivers
((d))
TV Transmitters

Show Answer

Answer: ((a))

Radio Receivers

106

Which of the following is a concept in mobile communication?

((a))
Triplexing
((b))
Duplexing.
((c))
Simplexing
((d))
Quadraplexing

Show Answer

Answer: ((a))

Triplexing

107

Solar cells work on the principle of ___.

((a))
Isolation and Opto coupling
((b))
Isolation
((c))
Photo Voltaic
((d))
Opto Coupling.

Show Answer

Answer: ((a))

Isolation and Opto coupling

108

Transistor in saturation region works as _______.

((a))
Switch
((b))
Attenuator
((c))
Oscillator
((d))
Amplifier

Show Answer

Answer: ((a))

Switch

109

Which of the following computer hardware is used to display feedback of our actions?

((a))
Keyboard
((b))
Mouse
((c))
Monitor
((d))
Printer

Show Answer

Answer: ((a))

Keyboard

110

In the case of optical fiber transmission link, LED’s and LASER’s are used as ______

((a))
Detectors
((b))
Sources
((c))
Repeaters
((d))
Amplifiers

Show Answer

Answer: ((a))

Detectors

111

For Clamp circuit one must _____

((a))
add DC signal with DC
((b))
add AC signal with DC
((c))
add AC signal with AC
((d))
subtract AC from DC

Show Answer

Answer: ((a))

add DC signal with DC

112

For which of the following functions can a Schmitt trigger be used?

((a))
Pulse shaping
((b))
Blocking
((c))
Amplification
((d))
Filtering

Show Answer

Answer: ((a))

Pulse shaping

113

AND gate EXOR gate combination is ____

((a))
both full and half adder.
((b))
full adder
((c))
half adder
((d))
flip flop

Show Answer

Answer: ((a))

both full and half adder.

114

In a PNP Transistor voltage divider biasing ____ resistors are used:

((a))
one
((b))
four
((c))
three
((d))
two

Show Answer

Answer: ((a))

one

115

On which of the following frequencies does a Wi-Fi network work?

((a))
2.4 MHz
((b))
5 MHz
((c))
10 GHz
((d))
5 GHz

Show Answer

Answer: ((a))

2.4 MHz

116

The heat sink of the BU205 transistor can be connected ____

((a))
directly
((b))
through a mica sheet
((c))
directly and through the cap
((d))
through the cap

Show Answer

Answer: ((a))

directly

117

Which of the following is a feature of a Darlington pair amplifier?

((a))
Voltage gain is nil
((b))
High input impedance and low voltage gain
((c))
Low input impedance and low voltage gain
((d))
high input impedance and high voltage gain

Show Answer

Answer: ((a))

Voltage gain is nil

118

A unijunction transistor (UJT) is used to generate a ____ wave

((a))
square
((b))
sine
((c))
saw tooth
((d))
triangle

Show Answer

Answer: ((a))

square

119

A Flip Flop is a oscillator.

((a))
four stable
((b))
bi-stable
((c))
mono stable
((d))
three stable.

Show Answer

Answer: ((a))

four stable

120

What is the full form of MCB?

((a))
Miniature circuit Broker
((b))
Maximum Circuit Breaker
((c))
Miniature Circuit Breaker
((d))
Minimum Circuit Breaker

Show Answer

Answer: ((a))

Miniature circuit Broker

121

What is the output of an LED driver?

((a))
Chopped AC
((b))
Pulsating DC
((c))
DC
((d))
AC

Show Answer

Answer: ((a))

Chopped AC

122

The BU205 transistor collector is the ____.

((a))
right side pin.
((b))
body of the transistor
((c))
centre pin.
((d))
left side pin.

Show Answer

Answer: ((a))

right side pin.

123

The mail Merge function is present in:

((a))
Microsoft Word
((b))
Microsoft Excel and Microsoft Powerpoint
((c))
Microsoft Excel
((d))
Microsoft Powerpoint

Show Answer

Answer: ((a))

Microsoft Word

124

In the context of mobile communication what is the full form of LTE?

((a))
Long Term Evolution
((b))
Last Time Evolution
((c))
Least Time Evolution
((d))
Long time Evolution

Show Answer

Answer: ((a))

Long Term Evolution

125

Sine Wave Peak to peak = ____

((a))
RMS/ Square root of six
((b))
RMS × Square root of three
((c))
RMS / Square root of two
((d))
RMS × Square root of eight

Show Answer

Answer: ((a))

RMS/ Square root of six

126

In an induction motor, stator is the

((a))
rotary part
((b))
part that is stationary
((c))
part that controls the speed
((d))
rotary and part that controls the speed

Show Answer

Answer: ((a))

rotary part

127

What can a CRO measure?

((a))
Capacitance.
((b))
resistance
((c))
inductance
((d))
frequency

Show Answer

Answer: ((a))

Capacitance.

128

LCD TV work on the principle of _____

((a))
emission of cathode rays and light
((b))
emission of cathode rays
((c))
light emission
((d))
light blockage

Show Answer

Answer: ((a))

emission of cathode rays and light

129

What is the beta current ratio of a transistor?

((a))
I_C/I_B
((b))
I_B/I_E
((c))
I_E/I_C
((d))
I_C/I_E

Show Answer

Answer: ((a))

I_C/I_B

130

IC 7812 is a _____ voltage regulator.

((a))
78 V
((b))
8 V
((c))
21 V
((d))
12 V

Show Answer

Answer: ((a))

78 V

131

Impedance can be measured using which among the following instrument?

((a))
LCR meter
((b))
CRO
((c))
DSO
((d))
Function generator

Show Answer

Answer: ((a))

LCR meter

132

Which of the following display interfaces can carry both, analog signals and digital signals?

((a))
VGA
((b))
HDMI
((c))
Optical
((d))
DVI

Show Answer

Answer: ((a))

VGA

133

Which transistor configuration amplifier’s current gain is lowest?

((a))
Emitter coupled
((b))
Common Emitter
((c))
Common Collector
((d))
Common base

Show Answer

Answer: ((a))

Emitter coupled

134

.______ technology is used in TV remotes.

((a))
LCD
((b))
Infrared lights
((c))
Ultraviolet rays
((d))
Ultraviolet rays and LCD

Show Answer

Answer: ((a))

LCD

135

Which of the following is an Operational amplifier?

((a))
IC 8085
((b))
IC 7805
((c))
IC 741
((d))
IC 555

Show Answer

Answer: ((a))

IC 8085

136

What happens to the Base emitter voltage of a transistor due to increase in temperature?

((a))
Becomes 0
((b))
decreases
((c))
remains the same
((d))
increases

Show Answer

Answer: ((a))

Becomes 0

137

Reverse biasing of a Zener diode _______

((a))
conducts electricity
((b))
does not conduct electricity
((c))
amplifies electricity
((d))
oscillates

Show Answer

Answer: ((a))

conducts electricity

138

In two stages, Transistor TC coupling _____

((a))
creates isolation between the two stages
((b))
blocks the AC between the two stages
((c))
creates direct coupling between the two stages
((d))
stops the AC and passes the DC

Show Answer

Answer: ((a))

creates isolation between the two stages

139

With Class C amplifier, gain is _____compared to Class A amplifier.

((a))
low
((b))
equal
((c))
high
((d))
moderate

Show Answer

Answer: ((a))

low

140

10 cells are connected in parallel with the internal resistance of 1 Ω and 1.5 Volts. the total voltage and total resistance is ______

((a))
10 V and 1.5 Ω
((b))
1.5 V and 0.1 Ω
((c))
100 V and 50 Ω
((d))
1.8 V and 1.5 Ω

Show Answer

Answer: ((a))

10 V and 1.5 Ω

141

An amplifier with a positive feedback circuit causes ____

((a))
bandwidth to stabilize
((b))
gain of an amplifier to stabilize
((c))
bandwidth to decrease
((d))
bandwidth to increase

Show Answer

Answer: ((a))

bandwidth to stabilize

142

Cell phone communication is a ___.

((a))
Full Simplex
((b))
Full Duplex
((c))
Simplex
((d))
Half Duplex

Show Answer

Answer: ((a))

Full Simplex

143

Gama is the ratio of ____

((a))
emitter current to base current
((b))
collector current to emitter current
((c))
collector current to base current
((d))
base current to collector current

Show Answer

Answer: ((a))

emitter current to base current

144

Hybrid parameter calculations are used in _____

((a))
two-port linear network
((b))
Push pull
((c))
Class A amp
((d))
Darlington pair

Show Answer

Answer: ((a))

two-port linear network

145

In case of silicon transistor the cutoff region voltage of base emitter is ____.

((a))
0.5
((b))
0.3
((c))
0.4
((d))
> 0.7

Show Answer

Answer: ((a))

0.5

146

IC 7805 is a ____ voltage regulator.

((a))
15 V
((b))
8 V
((c))
6 V
((d))
5 V

Show Answer

Answer: ((a))

15 V

147

By combining two Class B amplifiers, we can build ____

((a))
Push-pull amplifier
((b))
LC coupling
((c))
RC coupling
((d))
TC coupling

Show Answer

Answer: ((a))

Push-pull amplifier

148

What is the forward voltage of LED?

((a))
0.6 Vdc
((b))
1.5 Vdc to 3 Vdc
((c))
0.3 Vdc
((d))
1.8 Vdc to 3.3 Vdc

Show Answer

Answer: ((a))

0.6 Vdc

149

Which of the following panels has the best viewing angle?

((a))
LCD
((b))
LED
((c))
Plasma
((d))
CRT

Show Answer

Answer: ((a))

LCD

150

A center tap full rectifier consists of:

((a))
one diode
((b))
three diodes
((c))
two diodes
((d))
four diodes

Show Answer

Answer: ((a))

one diode

151

Which of the following LED colours is NOT present in an LED TV panel?

((a))
Green
((b))
White
((c))
Red
((d))
Blue

Show Answer

Answer: ((a))

Green

152

Transformer Eddy current losses are created due to ________

((a))
secondary winding
((b))
copper
((c))
core
((d))
primary winding

Show Answer

Answer: ((a))

secondary winding

153

The point intersection of DC and AC load line is knows as ____.

((a))
Voltage gain.
((b))
Operating point.
((c))
Power gain.
((d))
Current gain.

Show Answer

Answer: ((a))

Voltage gain.

154

On the load line (with AC input in CE) which one of the following is NOT possible?

((a))
cut-off point
((b))
oscillation
((c))
saturation point
((d))
Q/operating point.

Show Answer

Answer: ((a))

cut-off point

155

Formula for Number of Magnetic poles (P) in an Induction motor= ____

((a))
(180 × f)/N
((b))
(60 × f)/N
((c))
(360 × f)/N
((d))
(120 × f)/N

Show Answer

Answer: ((a))

(180 × f)/N

156

Find Current, if Resistance = 50 ohms and Power = 100 Watts

((a))
2 A
((b))
1.414 A
((c))
3 A
((d))
1.314 A

Show Answer

Answer: ((a))

2 A

157

Which of the following circuits is used to add a DC offset to waveform?

((a))
Clamper
((b))
Clipper
((c))
Amplifier
((d))
Rectifier

Show Answer

Answer: ((a))

Clamper

158

What colour LED lamp is commonly used for domestic use?

((a))
White
((b))
Black
((c))
Red
((d))
Green

Show Answer

Answer: ((a))

White

159

If a regulator IC provides lower than input then the converter is known as ____.

((a))
Boost
((b))
Buffer
((c))
Buck-Boost
((d))
Buck

Show Answer

Answer: ((a))

Boost

160

Why is an N-channel MOSFET preferred over a P-channel MOSFET?

((a))
Because it allows fast switching
((b))
Because it is TTL compatible.
((c))
Because of its low input impedance.
((d))
Because of the low noise.

Show Answer

Answer: ((a))

Because it allows fast switching

161

______ transistor/s are required for single stage amplification.

((a))
1
((b))
2
((c))
4
((d))
3

Show Answer

Answer: ((a))

162

8-bit registers consist of ___ Flip Flop.

((a))
4
((b))
12
((c))
16
((d))
8

Show Answer

Answer: ((a))

163

Saw tooth wave can be generated through the ____

((a))
Schmitt trigger
((b))
Hartley oscillator
((c))
Colpitts oscillator
((d))
Crystal oscillator

Show Answer

Answer: ((a))

Schmitt trigger

164

Which material is used to prepare optical fiber as a transmission media?

((a))
Glass and Plastic
((b))
Copper
((c))
Silver
((d))
Aluminium.

Show Answer

Answer: ((a))

Glass and Plastic

165

RAM is a _____

((a))
type of software
((b))
CPU register
((c))
temporary memory device
((d))
permanent memory device.

Show Answer

Answer: ((a))

type of software

166

In Microsoft Excel we cannot calculate _____

((a))
differentiation problems
((b))
division problems
((c))
arithmetic problems.
((d))
multiplication problems

Show Answer

Answer: ((a))

differentiation problems

167

What is the use of an LED driver?

((a))
It converts DC to AC
((b))
It converts AC to DC
((c))
It converts AC to AC
((d))
It converts DC to DC

Show Answer

Answer: ((a))

It converts DC to AC

168

How are SMD components in bulk mounted on PCB?

((a))
Using hot air blower
((b))
Using soldering iron
((c))
Using wave soldering machine
((d))
Using soldering pot

Show Answer

Answer: ((a))

Using hot air blower

169

What type of radiation is emitted from a remote control?

((a))
Visible
((b))
Ultaviolet
((c))
Infrared
((d))
Radio frequency

Show Answer

Answer: ((a))

Visible

170

Window 10 is a/an ____

((a))
type of computer
((b))
operating and booting system
((c))
booting system
((d))
operating system.

Show Answer

Answer: ((a))

type of computer

171

A Capacitor function _____

((a))
stops AC and passes DC
((b))
stops DC and passes AC
((c))
passes both, AC and DC
((d))
stops both, AC and DC

Show Answer

Answer: ((a))

stops AC and passes DC

172

In the ____ Storage Oscilloscope signals can be stored.

((a))
Cathode ray tube (CRT).
((b))
Digital Oscilloscope
((c))
Analog Oscilloscope.
((d))
VTVM

Show Answer

Answer: ((a))

Cathode ray tube (CRT).

173

An RLC series resonance boosts:

((a))
current
((b))
resistance
((c))
frequency
((d))
inductance

Show Answer

Answer: ((a))

current

174

Which of the following software is used for programming a micro controller?

((a))
Microsoft Word
((b))
Microsoft Paint
((c))
Microsoft Excel
((d))
Keil

Show Answer

Answer: ((a))

Microsoft Word

175

If a regulator IC provides a voltage higher than input, then the converter is knows as ___.

((a))
Boost
((b))
Buck
((c))
Buffer
((d))
Buck Boost

Show Answer

Answer: ((a))

Boost

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