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.

51.

Maximum demand on a power plant is_________________?
A. the greatest of all “short time interval averaged” demand during a period
B. instantaneous maximum value of kVA supplied during a period
C. both A. or B.
D. none of the above
Answer» B. instantaneous maximum value of kVA supplied during a period
Discussion
52.

Depreciation charges are high in case of__________?
A. thermal plant
B. diesel plant
C. hydroelectric plant
D. none of these
Answer» B. diesel plant
Discussion
53.

Annual depreciation as per straight line method, is calculated by__________?
A. the capital cost divided by number of year of life
B. the capital cost minus the salvage value, is divided by the number of years of life
C. increasing a uniform sum of money per annum at stipulated rate of interest
D. none of the above
Answer» C. increasing a uniform sum of money per annum at stipulated rate of interest
Discussion
54.

Annual depreciation cost is calculated by___________?
A. sinking fund method
B. straight line method
C. both A. and B.
D. none of the above
Answer» D. none of the above
Discussion
55.

Which of the following equipment provides fluctuating load?
A. Exhaust fan
B. Lathe machine
C. Welding transformer
D. All of the above
Answer» D. All of the above
Discussion
56.

___________ will offer the least load.
A. Vacuum cleaner
B. Television
C. Hair dryer
D. Electric shaver
Answer» E.
Discussion
57.

By the use of which of the following power factor can be improved?
A. Phase advancers
B. Synchronous compensators
C. Static capacitors
D. Any of the above
Answer» E.
Discussion
58.

_________offers the highest electric load.
A. Television set
B. Toaster
C. Vacuum cleaner
D. Washing machine
Answer» C. Vacuum cleaner
Discussion
59.

___________ is invariably used as base load plant.
A. Diesel engine plant
B. Nuclear power plant
C. Gas turbine plant
D. Pumped storage plant
Answer» C. Gas turbine plant
Discussion
60.

Which of the following power plants need the least period for installation ?
A. Thermal power plant
B. Diesel power plant
C. Nuclear power plant
D. Hydro-electric power plant
Answer» C. Nuclear power plant
Discussion
61.

Generating capacity connected to the bus bars and ready to take load when switched on is known as____________?
A. firm power
B. cold reserve
C. hot reserve
D. spinning reserve
Answer» E.
Discussion
62.

In Hopkinson demand rate or two part tariff the demand rate or fixed charges are__________?
A. dependent upon the energy consumed
B. dependent upon the maximum demand of the consumer
C. both A and B
D. neither A nor B
Answer» C. both A and B
Discussion
63.

In case of _________ fuel transportation is the major problem.
A. diesel power plants
B. nuclear power plants
C. hydro-electric power plants
D. thermal power plants
Answer» E.
Discussion
64.

Following power plant has instant starting?
A. nuclear power plant
B. hydro power plant
C. diesel power plant
D. both B and C
E. none of the above
Answer» E. none of the above
Discussion
65.

Different generating stations use following prime movers?
A. diesel engine
B. hydraulic turbine
C. gas turbine
D. steam turbine
E. any of the above
Answer» F.
Discussion
66.

Annual operating expenditure of a power plant consists of____________?
A. fixed charges
B. semi-fixed charges
C. running charges
D. all of the above
Answer» E.
Discussion
67.

Annual instalment towards depreciation reduces as rate of interest increases with______________?
A. sinking fund depreciation
B. straight line depreciation
C. reducing balances depreciation
D. none of the above
Answer» B. straight line depreciation
Discussion
68.

A nuclear power plant is invariably used as a__________?
A. peak load plant
B. base load plant
C. stand-by plant
D. spinning reserve plant
E. any of the above
Answer» C. stand-by plant
Discussion
69.

__________ is invariably used for peak load
A. Nuclear power plant
B. Steam turbine plant
C. Pumped storage plant
D. None of the above
Answer» D. None of the above
Discussion
70.

Direct conversion of heat into electric power is possible through__________?
A. fuel cell
B. batteries
C. thermionic converter
D. all of the above
Answer» D. all of the above
Discussion
71.

Ships are generally powered by___________?
A. nuclear power plants
B. hydraulic turbines
C. diesel engines
D. steam accumulators
E. none of the above
Answer» D. steam accumulators
Discussion
72.

Which of the following should be used for extinguishing electrical fires?
A. Water
B. Carbon tetrachloride fire extinguisher
C. Foam type fire extinguisher
D. CO2 fire extinguisher
Answer» C. Foam type fire extinguisher
Discussion
73.

In a distribution system, in order to improve power factor, the synchronous capacitors are installed__________?
A. at the receiving end
B. at the sending end
C. either A. or (b)
D. none of the above
Answer» B. at the sending end
Discussion
74.

Which of the following is the disadvantage of a synchronous condenser?
A. High maintenance cost
B. Continuous losses in motor
C. Noise
D. All of the above
Answer» E.
Discussion
75.

Which of the following is the essential requirement of peak load plant ?
A. It should run at high speed
B. It should produce high voltage
C. It should be small in size
D. It should be capable of starting quickly
Answer» E.
Discussion
76.

An induction motor has relatively high power factor at__________?
A. rated r.p.m.
B. no load
C. 20 percent load
D. near full load
Answer» E.
Discussion
77.

An alternator coupled to a __________ runs at slow speed, as compared to as compared to others.
A. diesel engine
B. hydraulic turbine
C. steam turbine
D. gas turbine
Answer» C. steam turbine
Discussion
78.

For a diesel generating station the useful life is expected to be around_________Years?
A. 15 to 20 years
B. 20 to 50 years
C. 50 to 75 years
D. 75 to 100 years
Answer» B. 20 to 50 years
Discussion
79.

__________ will be least affected due to charge in supply voltage frequency.
A. Electric clock
B. Mixer grinder
C. Ceiling fan
D. Room heater
Answer» E.
Discussion
80.

For a consumer the most economical power factor is generally____________?
A. 0.5 lagging
B. 0.5 leading
C. 0.95 lagging
D. 0.95 leading
Answer» D. 0.95 leading
Discussion
81.

In an interconnected system, the diversity factor of the whole system:
A. remains unchanged
B. decreases
C. increases
D. none of the above
Answer» D. none of the above
Discussion
82.

When the demand of consumers is not met by a power plant, it will resort to which of the following?
A. Efficient plant operation
B. Power factor improvement at the , generators
C. Penalising high load consumers by increasing the charges for electricity
D. Load shedding
Answer» E.
Discussion
83.

The connected load of a IVMIM uir consumer is around___________?
A. 5 kW
B. 40 kV
C. 80 kW
D. 120 kW
Answer» B. 40 kV
Discussion
84.

Which of the following is an advantage of static capacitor for power factor improvement?
A. Little maintenance cost
B. Ease in installation
C. Low losses
D. All of the above
Answer» E.
Discussion
85.

Which of the following is not an operating cost?
A. Maintenance cost
B. Fuel cost
C. Salaries of high officials
D. Salaries of operating staff
Answer» D. Salaries of operating staff
Discussion
86.

In which’of the following power plants the maintenance cost is usually high?
A. Nuclear power plant
B. Hydro-electric power plants
C. Thermal power plants
D. Diesel engine power plants
Answer» D. Diesel engine power plants
Discussion
87.

In _________ fuel transportation cost is least.
A. nuclear power plants
B. diesel generating plants
C. steam power stations
D. None
Answer» B. diesel generating plants
Discussion
88.

Air will not be the working substance in which of the following?
A. Open cycle gas turbine
B. Closed cycle gas turbine
C. Diesel engine
D. Petrol engine
Answer» C. Diesel engine
Discussion
89.

The knowledge of diversity factor helps in determining__________?
A. plant capacity
B. average load
C. peak load
D. kWh generated
Answer» B. average load
Discussion
90.

Which of the following plants is almost inevitably used as base load plant?
A. Diesel engine plant
B. Gas turbine plant
C. Nuclear power plant
D. Pumped storage plant
Answer» D. Pumped storage plant
Discussion
91.

Which of the following component, in a steam power plant, needs maximum maintenance attention?
A. Steam turbine
B. Condenser
C. Water treatment plant
D. Boiler
Answer» E.
Discussion
92.

Load shedding is possible through which of the following?
A. Switching of the loads
B. Frequency reduction
C. Voltage reduction
D. Any of the above
Answer» E.
Discussion
93.

The effect of electric shock on human body depends on which of the following?
A. current
B. voltage
C. duration of contact
D. all of the above
Answer» E.
Discussion
94.

Which of the following devices may be used to provide protection against lightening over voltages?
A. Horn gaps
B. Rod gaps
C. Surge absorbers
D. All of the above
Answer» E.
Discussion
95.

Which of the following is not necessarily an advantage of interconnecting various power stations?
A. Improved frequency of power supplied
B. Reduction in total installed capacity
C. Increased reliability
D. Economy in operation of plants
Answer» B. Reduction in total installed capacity
Discussion
96.

Which of the following, in a thermal power plant, is not a fixed cost?
A. Fuel cost
B. Interest on capital
C. Depreciation
D. Insurance charges
Answer» B. Interest on capital
Discussion
97.

Which of the following is not a method for estimating depreciation charges?
A. Sinking fund method
B. Straight line method
C. Diminishing value method
D. Halsey’s 50—50 formula
Answer» E.
Discussion