Explore topic-wise MCQs in Testing Subject.

This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.

1.

A draft tube is a part of which power plants?

A. Diesel engine power plant
B. Gas turbine power plant
C. Steam power plant
D. Hydro-electric power plant
E. All of the above
Answer» E. All of the above
Discussion
2.

The disadvantage of constant voltage transmission is

A. short circuit current of the system is increased
B. low power factor in heavy loads
C. large conductor area is required for same power transmission
D. All of the above
E. None of the above
Answer» B. low power factor in heavy loads
Discussion
3.

The calorific value of which of the following files is expected to be nearly equal?

A. Coal gas and lignite coal
B. Natural gas and coal gas
C. Anthracite coal and lignite
D. Petrol and diesel oil
E. None of the above
Answer» E. None of the above
Discussion
4.

Material generally used for bus bars is

A. cast iron
B. tungsten
C. Stainless steel
D. copper
E. None of the above
Answer» E. None of the above
Discussion
5.

Which of the following is a petroleum fuel?

A. Benzol
B. Methyl alcohol
C. Ethyl alcohol
D. Naphta
E. None of the above
Answer» E. None of the above
Discussion
6.

Baryon is one of the class of heavy elementary particles that includes

A. hyperons
B. neutrons
C. protons
D. All of the above
E. None of the above
Answer» E. None of the above
Discussion
7.

Cleat is

A. main joint in a coal seam along which it breaks most easily
B. floor of a coal seam
C. carbon and sulphur compound
D. crude oil containing low percentage of sulphur
E. None of the above
Answer» B. floor of a coal seam
Discussion
8.

Corona effect can be detected by

A. hissing sound
B. faint luminous glow of bluish colour
C. presence of ozone detected by odour
D. all of the above
E. None of the above
Answer» E. None of the above
Discussion
9.

Turnaround efficiency of pumped hydro schemes seldom exceeds

A. 10%
B. 15%
C. 25%
D. 65%
E. None of the above
Answer» E. None of the above
Discussion
10.

Which type of power plant will be preferred for a location in Bihar?

A. Nuclear power plant
B. Hydro-electric power plant
C. Thermal power plant
D. Solar power plant
E. None of the above
Answer» D. Solar power plant
Discussion
11.

In hydrothermal source of geothermal energy

A. hot water or steam is available
B. hot gases are available
C. molten lava is available
D. none of the above
E. None of the above
Answer» B. hot gases are available
Discussion
12.

Petrothermal systems are composed of hot dry rock with

A. no underground water
B. large underground water
C. petrochemicals
D. dense gases
E. None of the above
Answer» B. large underground water
Discussion
13.

The source of energy for satellite is

A. battery
B. solar cell
C. cryogenic storage
D. Any of the above
E. None of the above
Answer» C. cryogenic storage
Discussion
14.

Beaufort scale is graded from 0 to

A. 10
B. 12
C. 22
D. 100
E. None of the above
Answer» C. 22
Discussion
15.

Which of following converts thermal energy to kinetic energy?

A. Thermocouple
B. Storage battery
C. Fuel cell
D. Rocket
E. None of the above
Answer» E. None of the above
Discussion
16.

API gravity of water is taken as

A. zero
B. 1
C. 10
D. 100
E. None of the above
Answer» C. 10
Discussion
17.

Heavy water production plants in India are located at all the following places EXCEPT

A. Nangal
B. Bombay
C. Baroda
D. Tuticorin
E. None of the above
Answer» C. Baroda
Discussion
18.

Presence of sand in geopressured water is likely to cause problems of

A. erosion
B. heat exchange
C. water circulation
D. All of the above
E. None of the above
Answer» E. None of the above
Discussion
19.

For a 66 kV transmission line having span of 200 metres between towers, the approximate sag will be

A. 0.02 m
B. 0.2 m
C. 2 m
D. 20 m
E. None of the above
Answer» D. 20 m
Discussion
20.

Argillaceous rocks have

A. high clay content
B. high moisture content
C. low moisture content
D. low mineral content
E. None of the above
Answer» B. high moisture content
Discussion
21.

The maximum theoretical efficiencies of solar cells could be around

A. 99%
B. 60%
C. 48%
D. 1%
E. None of the above
Answer» D. 1%
Discussion
22.

Hopkinson demand rate curve is a

A. one part tariff
B. two part tariff
C. three part tariff
D. four part tariff
E. None of the above
Answer» C. three part tariff
Discussion
23.

The effect of wind pressure is more predominant on

A. transmission lines
B. neutral wires
C. insulators
D. supporting towers
E. None of the above
Answer» E. None of the above
Discussion
24.

Which of the following is not a high pressure boiler?

A. Loeffler
B. Lancashire coiler
C. Velox boiler
D. La Mont boiler
E. None of the above
Answer» C. Velox boiler
Discussion
25.

API gravity is expressed in terms of

A. gm/cc
B. dimensionless numbers
C. degrees
D. None of the above
E. None of the above
Answer» D. None of the above
Discussion
26.

Presence of ozone as a result of corona is harmful because

A. it gives bad odour
B. it corrodes the material
C. it transfers energy to the ground
D. it reduces power factor
E. None of the above
Answer» C. it transfers energy to the ground
Discussion
27.

The problem of ash handling does not exist in case of ------ fired boilers.

A. Lignite
B. Pulverised fuel
C. Peat
D. Gas
E. None of the above
Answer» E. None of the above
Discussion
28.

A relay for protective system should have

A. High speed operation
B. High sensitivity
C. Selectivity
D. Reliability
E. All of the above
Answer» F.
Discussion
29.

Which of the following equipment can be used for improving the power factor ?

A. Static capacitors
B. Synchronous condenser
C. Phase advancer
D. Any of the above
E. None of the above
Answer» E. None of the above
Discussion
30.

Thermal neutrons are

A. exceptionally fast neutrons
B. fast neutrons
C. moderately fast neutrons
D. slow neutrons
E. None of the above
Answer» E. None of the above
Discussion
31.

All of the following are heavy metals EXCEPT

A. Mercury
B. Sodium
C. Chromium
D. Cadmium
E. None of the above
Answer» C. Chromium
Discussion
32.

Local winds are caused by

A. differential heating of land and water
B. differential heating of plains and mountains
C. any of the above
D. None of the above
Answer» D. None of the above
Discussion
33.

Which of the following process is used for the production of alcohol?

A. Distillation
B. Destructive distillation
C. Cracking
D. Fermentation
E. None of the above
Answer» E. None of the above
Discussion
34.

TNT

A. thermonuclear thorium
B. total neutron transition
C. thermal neutron treatment
D. trinitrotoluene
E. None of the above
Answer» E. None of the above
Discussion
35.

HRC fuses provide best protection against

A. Short circuits
B. Ligntning
C. Sparking
D. Fire
E. All of the above
Answer» B. Ligntning
Discussion
36.

Lighite is

A. pure carbon
B. high calorific value coal
C. low calorific value coal
D. a vergetable origin liquid fuel
E. None of the above
Answer» D. a vergetable origin liquid fuel
Discussion
37.

Excess air requirement is more in case of

A. chain grate stokers
B. pulverized fuel burning
C. oil firing
D. gas firing
E. None of the above
Answer» B. pulverized fuel burning
Discussion
38.

Maximum permissible span for wooden poles is

A. 60 metres
B. 160 metres
C. 250 metres
D. 500 metres
E. None of the above
Answer» B. 160 metres
Discussion
39.

The bundling of conductors is done primarily to

A. reduce reactance
B. increase reactance
C. increase radio interference
D. reduce radio interference
E. None of the above
Answer» B. increase reactance
Discussion
40.

Which of the following is heavy oil?

A. Gasoline
B. Kerosene oil
C. Diesel oil
D. Bunker oil
E. None of the above
Answer» E. None of the above
Discussion
41.

A module is a

A. newly installed solar cell
B. series - parallel arrangement of solar cells
C. a series of solar cells when not used for power generation
D. None of the above
E. None of the above
Answer» C. a series of solar cells when not used for power generation
Discussion
42.

A photovoltaic cell converts

A. heat energy into mechanical energy
B. chemical energy into electrical energy
C. solar energy into electrical energy
D. electrical energy into chemical energy
E. None of the above
Answer» D. electrical energy into chemical energy
Discussion
43.

The disadvantage of transmission lines as compared to cables is

A. exposure to lightning
B. exposure to atmospheric hazards likes smoke, ice, etc.
C. inductive interference between power and communication circuits
D. All of the above
E. None of the above
Answer» E. None of the above
Discussion
44.

Photovoltaic solar energy conversion system makes use of

A. fuel cells
B. solar cells
C. solar ponds
D. None of the above
E. None of the above
Answer» C. solar ponds
Discussion
45.

Betz law finds application in

A. MHD systems
B. Solar cells
C. Geothermal power plants
D. Wind mills
E. None of the above
Answer» E. None of the above
Discussion
46.

The presence of CO2 and H2O in the atmosphere results in absorption of

A. short wave ultraviolet radiations
B. visible wavelengths of spectrum
C. long wave infrared radiations
D. all of the above
E. None of the above
Answer» D. all of the above
Discussion
47.

In case of oil fired boiler, the excess air is usually

A. 1 to 2 percent
B. 5 to 12 percent
C. 20 to 25 percent
D. 75 to 125 percent
E. None of the above
Answer» C. 20 to 25 percent
Discussion
48.

Watt second is the unit of

A. Force
B. Momentum
C. Power
D. Energy
E. None of the above
Answer» E. None of the above
Discussion
49.

The efficiency of a thermal power plant improves with

A. Larger quantity of water used
B. Lower load on the plant
C. Increased quantity of coal burnt
D. Use of high pressure steam
E. All of the above
Answer» E. All of the above
Discussion
50.

Which of the following is the advantage of de transmission?

A. Absence of line inductance and capacitance problems
B. No skin effects
C. For the same working voltage the potential stress on the insulation is less
D. No stability problems
E. All of the above
Answer» F.
Discussion