Explore topic-wise MCQs in Electrical Engineering Questions.

This section includes 97 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.

1.

With reference to a power station which of the following is not a fixed cost?
A. Fuel cost
B. Interest on capital
C. Insurance charges
D. Depreciation
Answer» B. Interest on capital
Discussion
2.

A consumer has to pay lesser fixed charges in____________?
A. flat rate tariff
B. two part tariff
C. maximum demand tariff
D. any of the above
Answer» D. any of the above
Discussion
3.

In a load curve the highest point represents______________?
A. peak demand
B. average demand
C. diversified demand
D. none of the above
Answer» B. average demand
Discussion
4.

Static capacitors are rated in terms of_____________?
A. kW
B. kWh
C. kVAR
D. none of the above
Answer» D. none of the above
Discussion
5.

For a power plant which of the following constitutes running cost?
A. Cost of wages
B. Cost of fuel
C. Cost of lubricants
D. All of the above
Answer» E.
Discussion
6.

The primary reason for low power factor is supply system is due to installation of____________?
A. induction motors
B. synchronous motors
C. single phase motors
D. d.c. motors
Answer» B. synchronous motors
Discussion
7.

Load curve helps in deciding___________?
A. total installed capacity of the plant
B. sizes of the generating units
C. operating schedule of generating units
D. all of the above
Answer» E.
Discussion
8.

Which of the following is the disadvantage due to low power factor?
A. Poor voltage regulation
B. Increased transmission losses
C. High cost of equipment for a given load
D. All of the above
Answer» E.
Discussion
9.

In a power plant if the maximum demand on the plant is equal to the plant capacity, then
A. plant reserve capacity will be zero
B. diversity factor will be unity
C. load factor will be unity
D. load factor will be nearly 60%
Answer» B. diversity factor will be unity
Discussion
10.

Load factor of a power station is generally___________?
A. equal to unity
B. less than unity
C. more than unity
D. equal to zero Diversity factor is always
Answer» C. more than unity
Discussion
11.

In two part tariff, variation in load factor will affect____________?
A. fixed charges
B. operating or running charges
C. both A. and (b)
D. either A. or (b)
Answer» C. both A. and (b)
Discussion
12.

Generators for peak load plants are usually designed for maximum efficiency at____________?
A. 25 to 50 percent full load
B. 50 to 75 percent full load
C. full load
D. 25 percent overload
Answer» C. full load
Discussion
13.

Which of the following generating station has minimum running cost ?
A. Nuclear
B. Hydro
C. Thermal
D. Diesel
Answer» C. Thermal
Discussion
14.

Which plant can never have 100 percent load factor?
A. Peak load plant
B. Base load plant
C. Nuclear power plant
D. Hydro electric plant
Answer» B. Base load plant
Discussion
15.

A power transformer is usually rated in____________?
A. kW
B. kVAR
C. kWh
D. kVA
Answer» E.
Discussion
16.

____________is the reserved generating capacity available for service under emergency conditions which is not kept in operation but in working order.
A. Hot reserve
B. Cold reserve
C. Spinning reserve
D. Firm power
Answer» C. Spinning reserve
Discussion
17.

For which of the following power plants highly skilled engineers are required for running the plants?
A. Solar power plants
B. Gas turbine power plants
C. Nuclear power plants
D. Hydro-electric power plants
Answer» D. Hydro-electric power plants
Discussion
18.

Large capacity generators are invariably___________?
A. water cooled
B. natural air cooled
C. forced air cooled
D. hydrogen cooled
Answer» E.
Discussion
19.

Load curve of a power plant has always____________?
A. zero slope
B. positive slope
C. negative slope
D. All of these
Answer» E.
Discussion
20.

__________ industry has the least power consumption per ton of product?
A. Soap
B. Sugar
C. Vegetable oil
D. Caustic soda
Answer» D. Caustic soda
Discussion
21.

A synchronous condenser is virtually which of the following?
A. Induction motor
B. Under excited synchronous motor
C. Over excited synchronous motor
D. D.C. generator
Answer» D. D.C. generator
Discussion
22.

Direct conversion of heat into electrical energy is possible through____________?
A. fuel cells
B. solar cells
C. MHD generators
D. none of the above
Answer» D. none of the above
Discussion
23.

Diversity factor has direct effect on the____________?
A. fixed cost of unit generated
B. running cost of unit generated
C. both A. and B.
D. neither A. nor B.
Answer» B. running cost of unit generated
Discussion
24.

A pilot exciter is provided on generators for which of the following reasons?
A. To excite the poles of main exciter
B. To provide requisite starting torque to main exciter
C. To provide requisite starting torque to generator
D. None of the above
Answer» B. To provide requisite starting torque to main exciter
Discussion
25.

Load curve is useful in deciding the_____________?
A. operating schedule of generating units
B. sizes of generating units
C. total installed capacity of the plant
D. all of the above
Answer» E.
Discussion
26.

Low power factor is usually not due to___________?
A. arc lamps
B. induction motors
C. fluorescent tubes
D. incandescent lamp
Answer» E.
Discussion
27.

A low utilization factor for a plant indicates that
A. plant is used for stand by purpose only
B. plant is under maintenance
C. plant is used for base load only
D. plant is used for peak load as well as base load
Answer» B. plant is under maintenance
Discussion
28.

Annual depreciation of the plant it proportional to the earning capacity of the plant vide
A. sinking fund depreciation
B. straight line depreciation
C. reducing balances depreciation
D. none of the above
Answer» D. none of the above
Discussion
29.

Which lightening stroke is most dangerous?
A. Direct stroke on line conductor
B. Indirect stroke on conductor
C. Direct stroke on tower top
D. Direct stroke on ground wire
Answer» B. Indirect stroke on conductor
Discussion
30.

The increased load during summer months is due to____________?
A. increased business activity
B. increased water supply
C. increased use of fans and air conditioners
D. none of the above
Answer» D. none of the above
Discussion
31.

Which of the following is the disadvantage of static capacitor for power factor improvement?
A. Easily damaged by high voltage
B. Cannot be repaired
C. Short service life
D. All of the above
Answer» E.
Discussion
32.

The efficiency of a plant is of least concern when it is selected as___________?
A. peak load plant
B. casual run plant
C. either A. or (b)
D. base load plant
Answer» D. base load plant
Discussion
33.

Which of the following are not repayable after a stipulated period?
A. Shares
B. Fixed deposits
C. Cash certificates
D. Bonds
Answer» B. Fixed deposits
Discussion
34.

Most efficient plants are normally used as____________?
A. peak load plants
B. base load plants
C. either A. or (b)
D. none of the above
Answer» C. either A. or (b)
Discussion
35.

For the same cylinder dimensions and speed, which of the following engine will produce least power?
A. Supercharged engine
B. Diesel engine
C. Petrol engine
D. All of the above engines will equal power
Answer» D. All of the above engines will equal power
Discussion
36.

The expected useful life of an hydroelectric power station is around_________________?
A. 15 years
B. 30 years
C. 60 years
D. 100 years
Answer» E.
Discussion
37.

A load curve indicates___________?
A. average power used during the period
B. average kWh (kW) energy consumption during the period
C. either of the above
D. none of the above
Answer» C. either of the above
Discussion
38.

The area under a load curve gives__________?
A. average demand
B. energy consumed
C. maximum demand
D. none of the above
Answer» C. maximum demand
Discussion
39.

The load factor of domestic load is usually____________?
A. 10 to 15%
B. 30 to 40%
C. 50 to 60%
D. 60 to 70%
Answer» B. 30 to 40%
Discussion
40.

In power plants insurance cover is provided for which of the following?
A. Unskilled workers only
B. Skilled workers only
C. Equipment only
D. All of the above
Answer» E.
Discussion
41.

power plant is expected to have the longest life?
A. Steam
B. Diesel
C. Hydroelectric
D. Any of the above
Answer» D. Any of the above
Discussion
42.

Salvage value of the plant is always____________?
A. positive
B. negative
C. zero
D. any of the above
Answer» E.
Discussion
43.

An over excited synchronous motor on no load is known as__________?
A. synchronous condenser
B. generator
C. induction motor
D. alternator
Answer» B. generator
Discussion
44.

Which of the following is not a source of power?
A. Thermocouple
B. Photovoltaic cell
C. Solar cell
D. Photoelectric cell
Answer» B. Photovoltaic cell
Discussion
45.

During load shedding:
A. system power factor is changed
B. some loads are switched off
C. system voltage is reduced
D. system frequency is reduced Efficiency is the secondary consideration in
Answer» C. system voltage is reduced
Discussion
46.

Which of the following source of power is least reliable?
A. Solar energy
B. Geothermal power
C. Wind power
D. iMHD
Answer» E.
Discussion
47.

_____________can generate power at unpredictable or uncontrolled times?
A. Solar power plant
B. Tidal power plant
C. Wind power plant
D. Any of the above
Answer» E.
Discussion
48.

For high value of diversity factor, a power station of given installed capacity will be in a position to supply?
A. less number of consumers
B. more number of consumers
C. neither A. nor B.
D. either A. or B.
Answer» C. neither A. nor B.
Discussion
49.

High load factor indicates
A. average power used during the period
B. average kWh (kW) energy consumption during the period
C. either of the above
D. none of the above
Answer» C. either of the above
Discussion
50.

Approximate estimation of power demand can be made by_____________?
A. load survey method
B. statistical methods
C. mathematical method
D. economic parameters
E. all of the above
Answer» F.
Discussion