Thermal Power Plant MCQ

21. Which of the following in a thermal power plant, is not a fixed cost? 

1. Fuel cost
2. Interest on capital
3. Depreciation
4. Insurance charges

22. Which one of the following is used to measure the temperature inside a boiler furnace?

1. Resistance thermometer
2. Bimetallic thermocouple
3. Optical pyrometer
4. Thermistor

23. In coal-fired thermal power stations, what are the electrostatic precipitators used for?

1. To remove dust particles setting on the bus bar conductors in the station yard
2. To condense steam by electrostatic means
3. To keep air heaters clean
4. To collect the dust particles from the flue gases

24. Which of the following is considered as the superior quality of coal?

1. Peat
2. Coke
3. Bituminous coal
4. Lignite

25. In a thermal power plant of moderate size, electrical power generated, at a voltage

1. 110 KV
2. 230 V
3. 440 V
4. 11 KV

26. The function of economizer in a thermal power plant is to

1. Extract heat from flue gases and uses it for heating feed water to a boiler
2. Condense the steam exhausted from the turbine
3. Remove carbon particles from flue gases
4. Increase the temperature of steam coming from the boiler before admitting to the turbine

27. Which plant has high depreciation charges?

1. Wind power plant
2. Thermal plant
3. Hydroelectric plant
4. Diesel plant

28. Power from

1. Thermal plants are preferred for normal periods and hydro plants are preferred for peak power periods
2. Thermal and hydro have no utility during peak periods
3. Both thermal and hydro are preferred for normal periods
4. Thermal and hydro have no utility during peak periods

29. In a vapour compression system, which of the following units is adversely affected by the presence of moisture?

1. Evaporator
2. Expansion valve
3. Compressor
4. Condenser

30. Which of the following is not a part of the steam power plant?

1. Switchyard 
2. Ash precipitators 
3. Draught fan 
4. Surge chamber