Economics of Power Generation

11. A nuclear power plant is invariably used as a

1. peak load plant
2. base load plant
3. stand-by plant
4. spinning reserve plant

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12. A pilot exciter is provided on generators for which of the following reasons?

1. To excite the poles of main exciter
2. To provide requisite starting torque to main exciter
3. To provide requisite starting torque to generator
4. None of the above

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13. A power transformer is usually rated in

1. kW
2. kVAR
3. kWh
4. kVA

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14. A synchronous condenser is virtually which of the following?

1. Induction motor
2. Under excited synchronous motor
3. Over excited synchronous motor
4. D.C. generator

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15. Air will not be the working substance in which of the following?

1. Closed cycle gas turbine
2. Open cycle gas turbine
3. Diesel engine
4. Petrol engine

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16. An alternator coupled to a _________ runs at slow speed, as compared to as com¬pared to others.

1. diesel engine
2. hydraulic turbine
3. steam turbine
4. gas turbine

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17. an generate power at unpredictable or uncontrolled times,

1. Solar power plant
2. Tidal power plant
3. Wind power plant
4. Any of the above

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18. An induction motor has relatively high power factor at

1. rated r.p.m.
2. no load
3. 20 percent load
4. near full load

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19. An over excited synchronous motor on noload is known as

1. synchronous condenser
2. generator
3. induction motor
4. alternator

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20. Annual depreciation as per straight line method, is calculated by

1. the capital cost divided by number of year of life
2. the capital cost minus the salvage value, is divided by the number of years of life
3. increasing a uniform sum of money per annum at stipulated rate of interest
4. none of the above

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