Power Plant Engineering MCQ

1. The commercial sources of energy are

(a) fossile fuels, water and radioactive substances.
(b) solar, wind, biomass.
(c) wood, animal wastes and agricultural wastes.
(d) none of the above.

2. Which of the following power plants is the least reliable ?

(a) Wind.
(b) Tidal.
(c) Geothermal.
(d) Solar.

3. Which of the following methods of generating electric power from the sea water is more advantageous ?

(a) Ocean currents.
(b) Wave power.
(c) Tidal power.
(d) None of the above.

4. The power output from an hydroelectric power plant depends on

(a) type of dam, type of catchment area and discharge.
(b) type of dam, head and system efficiency.
(c) discharge, head and system efficiency.
(d) type of turbine, type of dam and type of catchment area.

5. In hydroelectric power plants

(a) operating cost is low and initial cost is high.
(b) operating cost is high and initial cost is low.
(c) both operating cost as well as initial cost are high.
(d) both operating cost as well as initial cost are low.

6. The advantage(s) of hydro plants is/are

(a) low operating cost.
(b) they can be started and loaded very quickly.
(c) they can be used as base load and peak load plants as well.
(d) all the above.

7. Gross head of a hydroelectric power station is

(a) the difference of water level between the level in the storage and tail race.
(b) the height of water level in the river where the tail race is provided. (c) the height of water level in the river where the storage is provided. (d) all of the above.

8. With reference to hydropower station, the graphical representation of the discharge as a function of time is known as:

(a) Monograph.
(b) Hectrograph.
(c) Load duration curve.
(d) Hydrograph.

9. A graphical representation of the discharge and time is known as

(a) load curve.
(b) load duration curve.
(c) monograph.
(d) hectograph.
(e) hydrograph.

10. An hydrograph indicates

(a) the discharge at any time during the period under considerastion.
(b) the maximum and minimum turn-off during the period.
(c) the average run-off during the period.
(d) all of the above.

11. Hydrograph is similar to

(a) load duration curve.
(b) mass curve.
(c) energy load curve.
(d) chronological load curve.

12. The factors affecting the run-off are

(a) rain fall pattern, shape and size of catchment area.
(b) the topography and nature of soil in the catchment area.
(c) amount of vegetation and weather condition in the catchment area.
(d) all of the above.

13. The flow duration curve at a given head of a hydroelectric plant is used to determine

(a) total power available at the site.
(b) total units of energy available.
(c) load-factor at the plant.
(d) diversity factor for the plant.

14. The area under a flow duration curve represents.

(a) total units of energy available.
(b) total power available at site.
(c) total quantity of run-off during that period.
(d) maximum rate of run-off during that period.

15. A mass curve can be plotted from

(a) load duration curve.
(b) chronological load curve.
(c) energy load curve.
(d) both load duration curve and chronological load curve.

16. Storage requirement can be determined from

(a) hydrograph.
(b) flow-duration curve.
(c) mass curve.
(d) either by hydrograph or by mass curve.

17. In hydropower stations what is an enlarged body of water just above the intake and used as a regulating reservoir, called?

(a) Spillways.
(b) Forebay.
(c) Reservoir.
(d) Penstock.

18. A penstock is used as a conduit between

(a) the steam chest and the turbine in a thermal station
(b) the dam and the turbine in a hydrostation.
(c) the turbine and the discharge drain.
(d) the heat exchanger and the turbine in a nuclear power plant.
(e) None of these.

19. In high head hydroelectric power plant, the velocity of water flow in penstock is around

(a) 2 m/s
(b) 4 m/s
(c) 7 m/s
(d) 10 m/s

20. Location of a surge tank, in a hydroelectric power station, is near

(a) turbine.
(b) tail race.
(c) reservoir.
(d) dam.