Economics of Power Generation

31. During load shedding

1. system power factor is changed
2. some loads are switched off
3. system voltage is reduced
4. system frequency is reduced Efficiency is the secondary consideration in

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32. Following power plant has instant starting

1. nuclear power plant
2. hydro power plant
3. diesel power plant
4. both (b) and (c)

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33. For a consumer the most economical power factor is generally

1. 0.5 lagging
2. 0.5 leading
3. 0.95 lagging
4. 0.95 leading

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34. For a diesel generating station the useful life is expected to be around

1. 15 to 20 years
2. 20 to 50 years
3. 50 to 75 years
4. 75 to 100 years

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35. For a power plant which of the following constitutes running cost?

1. Cost of wages
2. Cost of fuel
3. Cost of lubricants
4. All of the above

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36. For any type of consumer the ideal tariff is

1. two part tariff
2. three part tariff
3. block rate tariff
4. any of the above

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37. For high value of diversity factor, a power station of given installed capacity will be in a position to supply

1. less number of consumers
2. more number of consumers
3. neither (a) nor (b)
4. either (a) or (b)

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38. For the same cylinder dimensions and speed, which of the following engine will produce least power?

1. Supercharged engine
2. Diesel engine
3. Petrol engine
4. All of the above engines will equal power

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39. For which of the following power plants highly skilled engineers are required for running the plants?

1. Nuclear power plants
2. Gas turbine power plants
3. Solar power plants
4. Hydro-electric power plants

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40. Generating capacity connected to the bus bars and ready to take load when switched on is known as

1. firm power
2. cold reserve
3. hot reserve
4. spinning reserve

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