This is the Multiple Choice Questions Part 1 of the Series in Power Plant Engineering as one of the Electrical Engineering topic. In Preparation for the REE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Exam Questions in Electrical Engineering field, Electrical Engineering Books, Journals and other Electrical Engineering References.
Start Practice Exam Test Questions Part 1 of the Series
Choose the letter of the best answer in each questions.
1. 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
Answer: Option C
Solution:
2. Coal used in power plant is also known as
A. Steam coal
B. Charcoal
C. Coke
D. Soft coal
Answer: Option A
Solution:
3. 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 pressures
Answer: Option D
Solution:
4. 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
Answer: Option D
Solution:
5. Equipment used for pulverizing the coal is known as
A. ball mill
B. hopper
C. burner
D. stoker
Answer: Option A
Solution:
6. Which of the following is considered as superior quality of coal?
A. Bituminous coal
B. Peat
C. Lignite
D. Coke
Answer: Option A
Solution:
7. In a power plant, coal is carried from storage place to boilers generally by means of
A. bucket
B. V-belts
C. trolleys
D. manually
Answer: Option B
Solution:
8. 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
Answer: Option C
Solution:
9. Permissible pH value of water for boilers is
A. 1
B. 7
C. slightly more than 7
D. 10
Answer: Option C
Solution:
10. A condenser in a thermal power plant condenses steam combing out of
A. boiler
B. super-heater
C. economizer
D. turbine
Answer: Option D
Solution:
11. Overall thermal efficiency of a steam power station is in the range
A. 18-24%
B. 30-40%
C. 44-62%
D. 68-79%
Answer: Option A
Solution:
12. Which of the following is not the voltage at which power is usually transmitted?
A. 132 kV
B. 66 kV
C. 33 kV
D. 20 kV
Answer: Option D
Solution:
13. Most of the generators in thermal power plants run at
A. 3000 rpm
B. 1500 rpm
C. 1000 rpm
D. 750 rpm
Answer: Option A
Solution:
14. 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
Answer: Option C
Solution:
15. For economy in generation power
A. diversity factor should be high
B. plant utilization factor
C. load factor should be high
D. load factor and diversity factor should be low
Answer: Option B
Solution:
16. Which of the following category of consumers can provide 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
Answer: Option B
Solution:
17. 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
Answer: Option A
Solution:
18. 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
Answer: Option B
Solution:
19. Demand factor is the
A. Maximum Demand / Average Demand
B. Maximum Demand / Connected Load
C. Average Demand / Maximum Demand
D. Connected Load / Maximum Demand
Answer: Option B
Solution:
20. 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%
Answer: Option A
Solution:
21. 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%
Answer: Option B
Solution:
22. Which plant can never have 100% load factor?
A. Nuclear power plant
B. Hydro electric plant
C. Peak load plant
D. Base load plant
Answer: Option C
Solution:
23. The ratio, maximum demand of the installation / sum of individual maximum demands is known as
A. Demand factor
B. Plant use factor
C. Diversity factor
D. Plant capacity factor
Answer: Option C
Solution:
24. 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
Answer: Option D
Solution:
25. 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
Answer: Option A
Solution:
26. 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
Answer: Option C
Solution:
27. 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
Answer: Option C
Solution:
For questions 28 to 31:
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%.
28. The average load is
A. 1025 kW
B. 1125 kW
C. 1425 kW
D. 1625 kW
Answer: Option B
Solution:
29. Total energy supplied in a year is
A. 9,875,000 kWh
B. 8345,000 kWh
C. 7450,000 kWh
D. 6395,000 kWh
Answer: Option A
Solution:
30. Diversity factor is
A. 3.80
B. 1.02
C. 1.12
D. 1.22
Answer: Option C
Solution:
31. Demand factor is
A. 0.75
B. 0.83
C. 0.89
D. 0.45
Answer: Option B
Solution:
32. In a steam power plant which component needs maximum maintenance attention?
A. Condenser
B. Boiler
C. Turbine
D. Water treatment plant
Answer:
Solution:
33. 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
Answer: Option D
Solution:
34. When maximum and average loads are equal, the load factor will be
A. 0
B. 0.01
C. 0.5
D. 1
Answer: Option D
Solution:
35. 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
Answer: Option D
Solution:
36. 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
Answer: Option A
Solution:
37. 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
Answer: Option C
Solution:
For questions 38 to 40:
Power plants considered are
I. Diesel
II. Thermal
III. Hydro
IV. Nuclear
38. Plants in ascending order of capital cost per MW are
A. I, II, III, IV
B. II, III, IV, I
C. III, IV, I, II
D. IV. Ill, I, II
Answer: Option A
Solution:
39. Plants in descending order of their expected useful life are
A. I, III, II, IV
B. II, I, III, IV
C. III, II, IV, I
D. IV, I, II, III
Answer: Option C
Solution:
40. Plants in ascending order of their operating cost per MWH generated are
A. IV, I, II, III
B. III, II, IV, I
C. II, I, III, IV
D. I, III, II, IV
Answer: Option B
Solution:
41. 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
Answer: Option D
Solution:
42. 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
Answer: Option D
Solution:
43. 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
Answer: Option D
Solution:
44. HRC fuses provide best protection against
A. short circuits
B. lightning
C. sparking
D. fire
Answer: Option A
Solution:
45. Sparking occurs when a load is switched off because the circuit has high
A. inductance
B. resistance
C. capacitance
D. magnetism
Answer: Option A
Solution:
46. Zero sequence component always flows through
A. phase wires
B. neutral wire
C. earth wire
D. any of these
Answer: Option B
Solution:
47. 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 operation cost and high load factor
Answer: Option B
Solution:
48. Which alternator will have more number of poles
A. coupled to hydraulic turbine
B. coupled to steam turbine
C. coupled to gas turbine
D. all will have same number of poles
Answer: Option A
Solution:
49. Which alternator usually runs at slow speed as compared to others
A. coupled to gas turbine
B. coupled to steam turbine
C. coupled to hydraulic turbine
D. coupled to diesel engine
Answer: Option C
Solution:
50. 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
Answer: Option A
Solution:
⇒ MCQ in Power Plant Engineering Part 2 | REE Board Exam
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