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OBJECTIVE TYPE PPD REVIEWER > MCQ IN POWER PLANT ENGG > Flashcards

MCQ IN POWER PLANT ENGG Flashcards

MULTIPLE CHOICE

1
Q

Out of the following, which is not a non-conventional source of energy?
A. Tidal Power
B. Geothermal Energy
C. Nuclear Energy
D. Wind power

A

C. Nuclear Energy

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2
Q

Coal used in power plant is also known as
A. Steam coal
B. Charcoal
C. Coke
D. Soft coal

A

A. Steam coal

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3
Q

The efficiency of thermal power plant improves with
A. increased quantity of coal burnt
B. larger quantity of water used
C. lower load in the plant
D. use of high steam pressure

A

D. use of high steam pressure

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4
Q

Power plants using coal work closely on known which of the following cycle?
A. Otto cycle
B. Binary vapor cycle
C. Brayton cycle
D. Rankine cycle

A

D. Rankine Cycle

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5
Q

Equipment used for pulverizing the coal is known as
A. ball mill
B. hopper
C. burner
D. stoker

A

A. ball mill

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6
Q

Which of the following is considered as superior quality of coal?
A. Bituminous coal
B. Peat
C. Lignite
D. Coal

A

A. Bituminous coal

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7
Q

In a power plant, coal is carried from storage place to boilers generally by means of
A. bucket
B. V-belts
C. trolley
D. manually

A

B. V-belts

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8
Q

The equipment installed in power plants to reduce air pollution due to smoke is
A. induced draft fans
B. de-super heaters
C. electrostatic precipitators
D. re-heaters

A

C. electrostatic precipitators

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9
Q

Permissible pH value of water for boilers is
A. 1
B. 7
C. slightly more than 7
D. 10

A

C. slightly more than 7

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10
Q

A condenser in a thermal power plant condenses steam combing out of
A. boiler
B. super-heater
C. economizer
D. turbine

A

D. turbine

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11
Q

Overall thermal efficiency of a steam power station is in the range
A. 18-24%
B. 30-40%
C. 44-62%
D. 68-79%

A

A. 18-24%

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12
Q

Most of the generators in thermal power plants run at
A. 3000 rpm
B. 1500 rpm
С. 1000 грm
D. 750 rpm

A

A. 3000 rpm

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13
Q

A load curve is a plot of
A. Load versus generation capacity
B. Load versus current
C. Load versus time
D. Load versus cost of power

A

C. Load versus time

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14
Q

For economy in generation power
A. diversity factor should be high
B. plant utilization factor should be high
C. load factor should be high
D. load factor and diversity factor should be low

A

B. plant utilization factor should be high

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15
Q

Which of the following category of consumers can provide the highest load factor ?
A. A domestic consumer
B. A continuous process plant
C. A steel melting unit using arc furnace
D. A cold storage plant

A

B. A continuous process plant

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16
Q

The normal connected load of a domestic consumer is usually
A. up to 10 kW
B. 10 to 20 kW
C. 25 to 50 kW
D. 50 to 100 kW.

A

A. up to 10 kW

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17
Q

Load factor during a period is
A. Average Load / Installed Capacity
B. Average Load / Maximum Load
C. Maximum Load / Average Load
D. Maximum Load / Installed Capacity

A

B. Average Load / Maximum Load

17
Q

Demand factor is the
A. Maximum Demand / Average Demand
B. Maximum Demand / Connected Load
C. Average Demand / Maximum Demand
D. Connected Load / Maximum Demand

A

B. Maximum Demand / Connected Load

18
Q

In a system if the base load is the same as the maximum demand, the load factor will be
A. 1
B. 0
C. infinity
D. 1%

A

A. 1

19
Q

A system having connected load of 100 kW, peak load of 80 kW, base load of 20 kW and average load of 40 kW, will have a load factor of?
A. 40%
B. 50%
C. 60%
D. 80%

A

B. 50%

20
Q

Which plant can never have 100% load factor?
A. Nuclear power plant
B. Hydro electric plant
C. Peak load plant
D. Base load plant

A

C. Peak load plant

21
Q

The ratio, sum of individual maximum demands / maximum demand of the installation is known as
A. Demand factor
B. Plant use factor
C. Diversity factor
D. Plant capacity factor

A

C. Diversity factor

22
Q

A power plant supplying energy to a city will usually experience peak demand
A. from midnight to early morning
B. 8 AM to 12 noon
C. 2 PM to 6 PM
D. 6 PM to 12 PM

A

D. 6 PM to 12 PM

23
Q

In a power plant a reserve generating capacity which is in operation but not in service is known as
A. Hot reserve
B. Cold reserve
C. Spinning reserve
D. Firm power

A

A. Hot reserve

24
Q

In an interconnected system consisting of a nuclear power stations, steam station and diesel generating station, which plant can be used as base load plant?
A. Steam station
B. Diesel generation plant
C. Nuclear power station
D. Any of these

A

C. Nuclear power station

25
Q

Capital cost per MWh is highest in case of
A. steam power plants
B. diesel engine power plants
C. nuclear power plants
D. hydroelectric power plants

A

C. nuclear power plants

26
Q

The annual peak load on a 30 MW power station is 25 MW. The power station supplies loads having maximum demands of 10 MW. 8.5 MW. 5 MW and 4.5 MW. The annual load factor is 45%.
The average load is
A. 1025 kW
B. 1125 kW
C. 1425 KW
D. 1625 kW

A

B. 1125 kW

27
Q

The annual peak load on a 30 MW power station is 25 MW. The power station supplies loads having maximum demands of 10 MW. 8.5 MW. 5 MW and 4.5 MW. The annual load factor is 45%.
Total energy supplied in a year is
A. 9,875,000 kWh
B. 8,345,000 kWh
C. 7,450,000 kWh
D. 6,395,000 kWh

A

A. 9,875,000 kWh

28
Q

The annual peak load on a 30 MW power station is 25 MW. The power station supplies loads having maximum demands of 10 MW. 8.5 MW. 5 MW and 4.5 MW. The annual load factor is 45%.
Diversity factor is
A. 3.80
B. 1.02
C. 1.12
D. 1.22

A

C. 1.12

29
Q

The annual peak load on a 30 MW power station is 25 MW. The power station supplies loads having maximum demands of 10 MW. 8.5 MW. 5 MW and 4.5 MW. The annual load factor is 45%.
Demand factor is
A. 0.75
B. 0.83
C. 0.89
D. 0.45

A

B. 0.83

30
Q

In a steam power plant which component needs maximum maintenance attention?
A. Condenser
B. Boiler
C. Turbine
D. Water treatment plant

A

B. Boiler

31
Q

As the load factor approaches unity, the shape of load duration curve
will be nearly
A. L shaped
B. inverted T shaped
C. triangular
D. rectangular

A

D. rectangular

32
Q

When maximum and average loads are equal, the load factor will be
A. 0
B. 0.01
C. 0.5
D. 1

A

D. 1

33
Q

Which of the following relation is incorrect?
A. Capacity factor = Utilization factor x Load factor
B. Load factor x Maximum load = Average load
C. Demand factor x Connected load = Maximum demand
D. None of these

A

D. None of these

34
Q

Capacity factor and load factor become identical when
A. peak load is equal to the capacity of the plant
B. Average load is half the capacity of the plant
C. Average load is same as peak load
D. Group diversity factor is equal to peak diversity factor

A

A. peak load is equal to the capacity of the plant

35
Q

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

A

C. plant is used for stand by purpose only

36
Q

When a power plant is not able to meet the demand of consumers it will resort to
A. penalizing high load consumers by increasing the charges for electricity
B. power factor improvement at the generators
C. efficient plant operation
D. load shedding

A

D. load shedding

37
Q

Which of the following power plants can generate power at unpredictable or uncontrollable times?
A. Wind power plant
B. Tidal power plant
C. Solar power plant
D. Any of these

A

D. Any of these

38
Q

Maximum demand tariff is generally not applied to domestic consumers because
A. they cannot afford today
B. they consume less power
C. their load factor is low
D. their maximum demand is low

A

D. their maximum demand is low

39
Q

Base load plants have
A. high capital cost, high operating cost and high load factor
B. high capital cost, low operating cost and high load factor
C. low capital cost, low operating cost and low load factor
D. low capital cost, high operating cost and high load factor

A

B. high capital cost, low operating cost and high load factor

40
Q

Which type of plant has the least running cost per kWh of energy generated?
A. Hydro-electric plant
B. Thermal power plant
C. Nuclear power plant
D. Diesel power plant

A

A. Hydro-electric plant

OBJECTIVE TYPE PPD REVIEWER (8 decks)

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