Practice Test: Question Set - 04
1. In a steam power plant, the function of a condenser is
- (A) To maintain pressure below atmospheric to
increase work output from the prime-mover
- (B) To receive large volumes of steam exhausted
from steam prime mover
- (C) To condense large volumes of steam to water
which may be used again in boiler
- (D) All of the above
2. The maximum length of a screw conveyor is about
- (A) 30 meters
- (B) 40 meters
- (C) 60 meters
- (D) 100 meters
3. Primary air is that air which is used to
- (A) Reduce the flame length
- (B) Increase the flame length
- (C) Transport and dry the coal
- (D) Provide air around burners for getting
optimum combustion
4. Where un-pulverized coal has to be used and boiler capacity is large, the stoker which is used is
- (A) Underfeed stoker
- (B) Overfeed stoker
- (C) Any one of the above
- (D) None of the above
5. Compounding of steam turbine is done for
- (A) Reducing the work done
- (B) Increasing the rotor speed
- (C) Reducing the rotor speed
- (D) Balancing the turbine
6. The commercial sources of energy are
- (A) Solar, wind and biomass
- (B) Fossil fuels, hydro-power and nuclear energy
- (C) Wood, animal wastes and agriculture wastes
- (D) None of the above
7. Rankine efficiency of a steam power plant
- (A) Improves in summer as compared to that in
winter
- (B) Improves in winter as compared to that in
summer
- (C) Is unaffected by climatic conditions
- (D) None of the above
8. The draught which a chimney produces is called
- (A) Induced draught
- (B) Natural draught
- (C) Forced draught
- (D) Balanced draught
9. Artificial draught is produced by
- (A) Air fans
- (B) Steam jet
- (C) Fan or steam jet
- (D) All of the above
10. The effect of considering friction in steam nozzles for the same pressure ratio leads to
- (A) Increase in dryness fraction of exit steam
- (B) Decrease in dryness fraction of exit steam
- (C) No change in the quality of exit steam
- (D) Decrease or increase of dryness fraction of
exit steam depending upon inlet quality
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