Electrical Engineering Power Plant Interview Questions - Set 04 - ObjectiveBooks

Electrical Engineering Power Plant Interview Questions - Set 04

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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