Wednesday, April 25, 2012

Thermal Power Plant Objective Questions Answers

1. In Thermal Power Plant the feed water coming from economizer is heated using:
a) HP steam
b) LP steam
c) re heater
d) flue gases

2. The efficiency of the boiler in modern thermal power plant will be of the order of:
a) 40%
b) 50%
c) 85%
d) 60%

3. Steam in thermal power plant is super heated in order to:
a) improve the Rankine cycle of efficiency
b) Reduces initial condensation losses
c) avoid too high temperature in the last stage of the turbine
d) all the above

4. The advantages of the reheating steam in the turbine is that:
a) It increases the efficiency of the turbine
b) It reduces the wear on the blade
c) It increases the work done through the turbine
d) all the above

5. In thermal power plant cooling tower is used to cool:
a) Condensate outlet water
b) Exhaust steam
c) Cooling feed water
d) all the above

6. The purpose of the condenser in thermal power plant is to:
a) Condensate the large volume of steam to water to be used as boiler feed water
b) Maintains pressure below atmospheric pressure so that maximum heat energy can be extracted from the steam
c) Receives large volume of steam exhausted from the steam turbin
d) All the above

7. The purpose of air pump in condenser is to:
a) remove water
b) remove air leaking in to condenser to maintain vacuum
c) maintaining atmospheric pressure in the condenser
d) both (a) and (b)

8. The modern steam turbines are:
a) reaction turbine
b) impulse turbine
c) impulse reaction turbine
d) none of the above

9. In coal preparation plants, the magnetic separators are used to remove:
a) dust
b) iron particles
c) clinkers
d) both (b) and (c)

10. In steam power plant is coal is carried from storage to boiler by means of:
a) trolleys
b) V-belts
c) buckets
d) conveyers


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