Generating Power Stations MCQs

Power System MCQs

1. A hydrograph indicates______.

a. The average run-off during the period

b. The maximum and minimum run-off during the period

c. The discharge at any time during the period under consideration

d. All of the above

2. Which is the conventional source of energy?

a. Wind 

b. Geothermal

c. Radio-active substances 

d. Solar

3. The power output from a hydro-electric power plant doesn't depend on ______.

a. System efficiency

b. Type of turbine 

c. Head

d. Discharge

4.  A station operates with a load factor and plant capacity factor of 0.75, with a maximum demand  of 100 MW. The reserve capacity is______.

a. 133.33 MW

b. 0 MW

c. 75 MW

d. 100 MW

5. The area under daily load curve gives_______.

a. Energy generated to supply peak load

b. Energy generated per day

c. Energy generated during off-peak hours

d. Energy generated during peak hours

6. Within the boiler, the steam has highest temperature in_______.

a. Water drum

b. Water walls

c. Water tubes

d. Superheater

7. In which part of the thermal power plant, the steam pressure is less than that of atmosphere?

a. Condenser

b. Superheater

c. Turbine

d. Boiler

8. In a nuclear reactor, chain reaction is controlled by_____.

a. Brass rods

b. Graphite rods

c. Cadmium rods

d. Iron rods

9. In a nuclear power station using boiling water reactor, water is used as_________.

a. Neither moderator nor coolant

b. Both moderator and coolant

c. A coolant but not as a moderator

d. A moderator but not as a coolant

10. Electrostatic precipitator is installed between__________.

a. Boiler furnace and economiser

b. Economiser and air preheater

c. Air preheater and induced fan

d. Induced fan and chimney

11. The efficiency of a nuclear power plant is less than that of a conventional fuel fired thermal plant because of__________.

a. Low pressure and temperature conditions

b. Higher pressure conditions

c. Higher temperature conditions

d. Less injection of heat in the condenser

12. A generating station which has a high investment cost and low operating cost is usually operated as a________.

a. Medium load station

b. Base load station

c. Peak load station

d. None of the above

13. The surge tank is a component of a_______.

a. Hydro PP

b. Pumped storage PP

c. Nuclear PP

 d. Thermal PP

14. The choice of number and size of units in a station are governed by best compromise between_______.

a. Plant load factor and use factor

b. Plant capacity factor and plant-use factor

c. A plant load factor and capacity factor

d. None of the above

15. A peak load station___________.

a. Can have a operating cost high

b. Should have a low capital cost

c. Should have a low operating cost

d. Both (b) and (a)

16. The modern trend in electric power generation is__________.

a. To have a large size thermal plants located near coal fields

b. To have a large size thermal plants near load center's

c. To have a large number of small size thermal plants located at different places

d. None of the above

17. In a steam power plant heat from the flue gases is recovered in__________.

a. A desuper heater

b. Economiser and air preheater

c. A chimney

d. A condenser

18. A plant having maximum demand more than the installed capacity will have utilization factor________.

a. More than 100%

b. Equal to 100%

c. Less than 100%

d. None of the above

19 . If capacity factor = load factor, then

a. Utilization factor is equal to one

b. Utilization factor is non-zero

c. Utilization factor is zero

d. None of the above

20. When compared to a thermal plant, the operating cost and capital cost of a hydro-electric plant are respectively__________.

a. Both low

b. Both high

c. Low and high

d. High and low

21. It is necessary to heat water before feeding it back to the boiler as because of this_________.

a. Some other impurities carried by steam and condensate due to corrosion in boiler and condenser are precipitated outside the boiler

b. Thermal stresses due to cold water entering the boiler drum are avoided

c. The dissolved oxygen and carbon dioxide which would otherwise corrode boiler are removed in the feed water heater

d. All  of the above