Hydroelectric Power Plant multiple choice questions
Hydroelectric Power Plant
1. Hydroelectric power plant is __________
a) Non-renewable source of energy
b) Conventional source of energy
c) Non-conventional source of energy
d) Continuous source of energy
Answer: Conventional source of energy
2. The amount of electrical energy that can be generated by a hydroelectric power plant depends upon ___________
a) Head of water
b) Quantity of water
c) Specific weight of water
d) Efficiency of Alternator
Answer: Quantity of water
3. Which of the following is not a requirement for site selection of hydroelectric power plant?
a) Availability of water
b) Large catchment area
c) Rocky land
d) Sedimentation
Answer: Sedimentation
4. Which of the following statement is true about hydroelectric power plant?
a) Hydroelectric power plants are multipurpose.
b) Due to non-uniform flow of water frequency control in such plants is very difficult.
c) Hydroelectric power plant has high running cost
d) Water is used as fuel in hydroelectric power plant
Answer: Hydroelectric power plants are multipurpose.
5. Which of the following is the correct equation for the electrical power generated by the hydroelectric power plant?
a) 75×0.736 wQHη Watt
b) (7.5/0.736) × wQHη Watt
c) 0.845 ×wQHη Watt
d) 9.81 ×wQHη
Answer: 0.845 ×wQHη Watt
6. Which of the following is not an advantage of hydroelectric power plant?
a) no fuel requirement
b) low running cost
c) continuous power source
d) no standby losses
Answer: continuous power source
7. Which statement about hydroelectric power plant is wrong?
a) Efficiency of hydroelectric power plant does not reduce with age
b) Its construction coast is very high and takes a long time for erection.
c) It is very neat and clean plant because no smoke or ash is produced.
d) Meeting rapidly changing load demands is not possible in hydroelectric power plant.
Answer: Meeting rapidly changing load demands is not possible in hydroelectric power plant.
8. Hydroelectric power plant is mainly located in ____________
a) Flat areas
b) Deserts
c) Hilly areas
d) Deltas
Answer: Hilly areas
9. Potential energy of water is used to drive the turbine.
a) True
b) False
Answer: False
10. Hydroelectric power plant is generally located near load centre.
a) True
b) False
Answer: False
a) Non-renewable source of energy
b) Conventional source of energy
c) Non-conventional source of energy
d) Continuous source of energy
Answer: Conventional source of energy
2. The amount of electrical energy that can be generated by a hydroelectric power plant depends upon ___________
a) Head of water
b) Quantity of water
c) Specific weight of water
d) Efficiency of Alternator
Answer: Quantity of water
3. Which of the following is not a requirement for site selection of hydroelectric power plant?
a) Availability of water
b) Large catchment area
c) Rocky land
d) Sedimentation
Answer: Sedimentation
4. Which of the following statement is true about hydroelectric power plant?
a) Hydroelectric power plants are multipurpose.
b) Due to non-uniform flow of water frequency control in such plants is very difficult.
c) Hydroelectric power plant has high running cost
d) Water is used as fuel in hydroelectric power plant
Answer: Hydroelectric power plants are multipurpose.
5. Which of the following is the correct equation for the electrical power generated by the hydroelectric power plant?
a) 75×0.736 wQHη Watt
b) (7.5/0.736) × wQHη Watt
c) 0.845 ×wQHη Watt
d) 9.81 ×wQHη
Answer: 0.845 ×wQHη Watt
6. Which of the following is not an advantage of hydroelectric power plant?
a) no fuel requirement
b) low running cost
c) continuous power source
d) no standby losses
Answer: continuous power source
7. Which statement about hydroelectric power plant is wrong?
a) Efficiency of hydroelectric power plant does not reduce with age
b) Its construction coast is very high and takes a long time for erection.
c) It is very neat and clean plant because no smoke or ash is produced.
d) Meeting rapidly changing load demands is not possible in hydroelectric power plant.
Answer: Meeting rapidly changing load demands is not possible in hydroelectric power plant.
8. Hydroelectric power plant is mainly located in ____________
a) Flat areas
b) Deserts
c) Hilly areas
d) Deltas
Answer: Hilly areas
9. Potential energy of water is used to drive the turbine.
a) True
b) False
Answer: False
10. Hydroelectric power plant is generally located near load centre.
a) True
b) False
Answer: False
11. Pelton wheel turbine is used for minimumof the following heads
a) 40 m
b) 120 m
c) 150 m
d) 180 m or above
Answer: 180 m or above
12. For high head hydro-electric plants,the turbine used is
a) Pelton wheel
b) Francis
c) Kaplan
d) All of the above
Answer: Pelton wheel
13. Francis and kaplan turbine is used for________heads hydro-electric plant.
a) Medium and low head
b) High head
c) Low head
d) Low and high head
Answer: Medium and low head
14. In a hydro-electric plant,spillways are used
a) To discharge all surplus water
b) To discharge surplus water on the downstream side of dam
c) Water is not not available in sufficient quantity
d) None of the above
Answer: To discharge surplus water on the downstream side of dam
15. The cheapest plant in operation and maintenance is
a) Staem power plant
b) Nuclear power palnt
c) Hydro-electric power plant
d) None of the above
Answer: Hydro-electric power plant
16. Pelton turbines are mostly
a) Horizontal
b) Vertical
c) Inclined
d) None of the above
Answer: Horizontal
17. The most simple and keen plant is
a) Nuclear power plant
b) Steam power plant
c) Hydro-electric power palnt
d) None of the above
Answer: Hydro-electric power palnt
18. 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
Answer: Head,discharge and efficiency of the system
19. The annual depriciation of a hydro power plant is about
a) 0.5% to 1.5%
b) 10% to 15%
c) 15% to 20%
d) 20% to 25%
Answer: 0.5% to 1.5%
20. The running cost of hydro-electric power plant is______paise per unit
a) 10
b) 8
c) 5
d) 15
Answer: 5
21. Operating charges are minimum in the case of____________for same power output
a) Gas turbine plant
b) Hydel plant
c) Thermal plant
d) Nuclear plant
Answer: Hydel plant
22. In high head hydro power plant the velocity of water in penstock is about
a) 1 m/s
b) 4 m/s
c) 7 m/s
d) 12 m/s
Answer: 7 m/s
23. The function of a surge tank is
a) To supply water at constant pressure
b) To produce surges in the pipe line
c) To relieve water hammer pressures in the penstock pipe
d) All of the above
Answer: To relieve water hammer pressures in the penstock pipe
24. The cost of fuel transportation is minimum
a) Thermal power plant
b) Hydro-electric power plant
c) Nuclear power plant
d) None of the above
Answer: Hydro-electric power plant
25. Francis turbine is usually used for
a) Low head installation upto 30 m
b) Medium head installation from 30 m to 180 m
c) High head installation above 180 m
d) For all heads
Answer: Medium head installation from 30 m to 180 m
26. In francis turbine runner,the number of blades is generally of the order of
a) 1-2
b) 4-6
c) 6-8
d) 12-16
Answer: 12-16
27. Gross head of a hydro power station is
a) The difference of water level between the level in the storage and tail race
b) The height of the water level in the river where the storage is provided
c) The height of the water level in the river where the tail race is provided
d) None of the above
Answer: The difference of water level between the level in the storage and tail race
28. Location of the surge tank in a hydro-electric station is near to the
a) Tailrace
b) Turbine
c) Reservoir
d) None of the above
Answer: Reservoir
29. Francis,kaplan and propeller turbines fall under the category of
a) Impulse turbine
b) Reaction turbine
c) Impulse reaction combined
d) Axial flow
Answer: Reaction turbine
30. Operating charges are minimum in the case of____________for same power output
a) Gas turbine plant
b) Hydel plant
c) Thermal plant
d) Nuclear plant
Answer: Hydel plant
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