MCQ on Power Plant Engineering Part-7

Power Plant Engineering

1. The power output from a hydro-electric power plant depends on three parameters______.

a. Head, type and dam of discharge

b. Head, discharge and efficiency of the system

c. Efficiency of the system, type of draft tube and type of turbine used

d. Type of dam, discharge and type of catchment area

 

2. Which part of the wind turbines senses wind speed, wind direction, shaft speed and torque?

 a) Turbine blade

 b) Shaft

c) Rotor

d) Controller

 

3. Which among the following reduces the capacity of reservoir and causes rapid erosion of turbine blades?

a) Contamination of highly corrosive material

b) Sedimentation effect

c) Submerged vegetation

d) Solid contamination

 

4. What are provided to minimize heat loss?

a) Absorber plate

b) Surface plate

c) Insulation

d) Casing

 

5. The installed capacity of wind energy in India is about_________.

a. 8000 MW

b. 1500 MW

c. 6000 MW

d. 4000 MW

 

6. Tidal energy utilizes_____.

a. Kinetic energy of water

 b. Potential energy of water.

c. Both (a) and (b)

d. None of these.

 

7. Tidal energy development needs_______.

 a. Huge capacity and long construction time.

b. Huge capacity and low construction time.

 c. Low capacity and long construction time.

d. Low capacity and low construction time.

 

8. Pugga valley in Ladakh is suitable for which among the following power generation______.

 a. Solar

b. Geo thermal

c. Wind

d. None of these

9. Presence of non – condensable gasses in a geo - pressured water causes _______.

a. Pollution problem

 b. Corrosion problem

c. Flow problem

d. All of the above.

 

10. In geo thermal power plants waste water is _________.

a. Discharged back to earth.

b. Discharged into the sea.

c. Recirculated after cooling in cooling towers.

d. Evaporated in ponds.

 

11. The area under the load curve represents ____________.

a) the average load on power system

b) maximum demand

c) number of units generated

d) load factor

 

12. During which time the demand of electrical energy is maximum?

a) 2 A.M. to 5 A.M.

b) 5 A.M. to 12 P.M.

c) 12 P.M. to 7 P.M.

d) 7 P.M. to 9 P.M

 

13. What is Demand factor?

a) Ratio of connected load to maximum demand

b) Ratio of average load to connected load

c) Ratio of maximum demand to the connected load

d) Ratio of kilowatt-hour consumed to 24 hours

 

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.

 

15. Depreciation cost of a plant is calculated by_______.

a. Straight line method

b. Diminishing value method

c. Sinking fund method

d. Any of the above.

 

16. A diesel power plant is best suited as ______.

a.base load plant

b.stand-by plant

c.peak load plant

d.general purpose plant.

 

17. Load duration curve indicates _______.

a) the variation of load during different hours of the day

b) total number of units generated for the given demand

c) total energy consumed by the load

d) the number of hours for which the particular load lasts during a day

 

18. A consumer has to pay lesser fixed charges in_______.

a. Flat rate tariff

b. Two part tariffs

c. Maximum demand tariff

d. Any one of the above.

 

19. In order to have lower cost of electrical energy generation_________.

a) The load factor and diversity factor should be low.

b) The load factor should be low, but diversity factor should be high.

c) The load factor should be low but diversity factor low.

d) The load factor and diversity factors should be high.

 

20. The load of a consumer is generally measured in terms of________.

a. Volts

b. Amperes

c. Ampere hour

d. kW.

 

21. Which method of depreciation charge estimation gives the heaviest charges during early years of plant life?

a. Straight line method

b. Diminishing value method

c. Sinking fund method

d. All give same charges.

 

22. The load factor is __________.

a) always less than unity

b) less than or greater than 1

c) always greater than 1

d) less than zero

 

23. During summer months the increased load is due to _______.

(a) increased water supply

(b) vacations in institutions

(c) increased business activity

(d) increased use of fans and air conditioners.

 

24. Which domestic utility item has the highest power rating ?

(a) Refrigerator

(b) Ceiling fan

(c) Tube light

(d) Electric iron.

 

25. For a thermal power plant, which is not the fixed cost ?

(a) Interest on capital

(b) Depreciation

(c) Insurance charges

(d) Cost of fuel.

 

26. The highest point on a load curve represents _______.

a. Average demand

b. Diversion field demand

c. Peak demand

d. None of the above

27. _______ will be least affected due to charge in supply voltage frequency.

a. Electric clock

b. Mixer grinder

c.ceiling fan

d.room heater

 

28. If the penalty factor of a plant is unity, its incremental transmission loss is ____________.

a) 1.0

b) – 1.0

c) Zero

d) None of the above

 

29. Which of the following is called as cold reserve?

a) Reserve capacity available but not ready to use

 b) Reserve capacity available and ready for use

c) Generating capacity connected to bus and ready to take load

d) Capacity in service in excess of peak load

 

30. Most economic load on an overhead line is ______.

a) Greater than natural load.

b) Less than the natural load.

c) Equal to the natural load.

d) None of the above is necessary.

 

31. The Best location for power factor improvement apparatus is _______.

a) At the receiving end

b) Where the apparatus responsible for low power factor is installed

c) Both (a) and (b)

d) None of these

 

32. What is the advantage of sectionalizing of power plant?

a) High reliability

b) Low capital cost

c) Low maintenance

d) Easy operation

 

33. Which of the following is equal to the maximum demand?

a) The ratio of area under the curve to the total area of the rectangle

b) The ratio of area under curve and number of hours

c) The peak of the load curve

d) The area under the curve

 

34. What is the difference between two part tariffs and maximum demand tariff?

a. A separate meter is used.

b. A separate maximum demand meter is used.

c. Semi fixed charges are also included.

d. All of these.

 

35. The capital cost of the thermal power plant will depend on_____.

a) The size of the plant

b) The fuel cost

c) (a) and (b) both

d) None of the above

 

36. Which of the following plant has the highest capital cost?

a) Diesel power plant

b) Thermal power plant

c) Hydro-power plant

d) Nuclear power plant

 

37. The hydro-power plant operates at higher load factor than the thermal power plant.

a) True

b) False

 

38. This tariff is applied for which kind of consumers?

a. Big consumers.

b. Small consumers.

c. Residential consumers.

d. All of these.

 

39. What is called when an industry removes water from a source and then returns the heated water to its source?

a) Water pollution

b) Soil pollution

c) Air pollution

d) Thermal pollution

 

40. Which power plant has minimum operating cost?

a) Hydroelectric power plant

b) Thermal power plant

 c) Nuclear power plant

d) Gas Turbine Power Plant

 

40. What is the main effect of thermal pollution to the oxygen solubility in water bodies?

a) They increase the solubility of oxygen in water bodies

b) They maintain the solubility of oxygen in water bodies

c) They reduce the solubility of oxygen in water bodies

 d) They don’t cause any effect in solubility of oxygen to the water bodies

 

42. Growing industrial activities is one of the reasons for thermal pollution________.

a) True

 b) False

 

43. A 400 MW nuclear power station would produce an equivalent radium of _____________.

a) 100 tons daily

b) 1000 tons daily

c) 500 tons daily

d) 10 tons daily

 

44. Which type of disposal of nuclear waste is cheapest and easiest method of all?

a) Ground

b) Air

c) Space

d) Water