1. A power station in which the potential energy of water at a higher level is used to generate electrical energy
(A) Thermal Power Station
(B) Tidal Power Station
(C) Nuclear Power Station
(D) Hydel Power Station
2. A means of generating electricity that requires more land than other methods
(A) Thermal Power Plant
(B) Hydro Power Plant
(C) Nuclear Power Plant
(D) Diesel Power Plant
3. Pakistan has a large hydel power station at
(A) Tarbela
(B) Mangla
(C) Warsak
(D) All
4. A hydel power station can be installed where
(A) Fuel is available in abundance
(B) Water is available in abundance with adequate head
(C) Both a & b
(D) None of these
5. It is the primary source of water
(A) Rain
(B) Snow-fall
(C) Both a & b
(D) River & canals
6. They are usually mounted on the same shaft
(A) Generator and exciter
(B) Turbine and exciter
(C) Turbine and generator
(D) Turbine, generator and exciter
7. The water level in a storage reservoir or water storage pond is called
(A) Headrace
(B) Tailrace
(C) Penstock
(D) None of these
8. The outlet through which the water discharged from the turbine is called
(A) Tailrace
(B) Headrace
(C) Penstock
(D) Breaking jet
9. The purpose of a lake is to store water and provide ---------
(A) Fishes
(B) Area
(C) Head
(D) Electricity
10. All the area behind the dam where water collects from rain and snowmelt
(A) Plant area
(B) Catchment area
(C) Lake
(D) Flood area
11. Long tunnels are used for the plant
(A) Thermal
(B) Nuclear
(C) Tidal
(D) Hydel
12. This part is not used in hydel power plants
(A) Search tank
(B) Compressor
(C) Forebay
(D) Penstock
13. A sudden load increase on the generator may cause penstock
(A) Water hammer
(B) High pressure
(C) Vacuum
(D) All of these
14. It provides optimal regulation of water pressure in the system during load changes in a hydel power station
(A) None of these
(B) Penstock
(C) Search tank
(D) Governor
15. The power generated in a hydropower plant depends on
(A) Lake and water
(B) Height of head
(C) Water volume and head
(D) Speed of water
16. Power is delivered from hydropower plants to consumers
(A) None of these
(B) From distribution lines
(C) From microwaves
(D) From transmission lines
17. A hydropower plant that takes water directly from a river is called a run-of-river plant
(A) With pond
(B) Without pond
(C) Storage
(D) None of these
18. It acts as a natural surge tank in the run-off river plant containing pond
(A) Penstock
(B) Hydel turbine
(C) Dam
(D) Forebay
19. Power plants which operate at the lower part of the load curve are called
(A) None of these
(B) Peak load plant
(C) Pump storage power plant for peak load
(D) Base load plant
20. There are hydel power plants depending on the load
(A) Base load plants
(B) Peak load plants
(C) Both a and b
(D) None of these
21. Pump storage hydel plant has ------ponds
(A) Two
(B) One
(C) Three
(D) Four
22. Power plants which operate at head which is less than 30 meters, are called
(A) Medium head plants
(B) Low head plants
(C) High head plants
(D) None of these
23. It is a type of modern hydraulic turbine
(A) Impulse turbine
(B) None of these
(C) Both a and b
(D) Reaction turbine
24. A turbine which is driven by the force of water is called
(A) Impulse Turbine
(B) Reaction Turbine
(C) Pelton wheel
(D) None of these
25. This turbine does not require nozzles
(A) Impulse
(B) Reaction
(C) Both a and b
(D) None of these
26. A turbine whose blades are adjustable is called
(A) Propeller type
(B) Kaplan
(C) Francis
(D) None of these
27. Francis Turbine are actually
(A) Reaction turbine
(B) Impulse Turbine
(C) Axial flow turbine
(D) Both a & c
28. Generators are used at low head hydel power plants
(A) Low speed
(B) Large diameter
(C) Small diameter
(D) Both a & b
29. A sudden increase in load on the generator of a hydel power plant can prevent it from decelerating
(A) None of these
(B) By increasing the amount of water
(C) By increasing the number of poles
(D) By increasing the excitation
30. Hydroelectric generators have number of poles
(A) Two
(B) Four
(C) Six
(D) More than six