Electrical Engineering Power Plant Quiz Questions - Set 05 - ObjectiveBooks

Electrical Engineering Power Plant Quiz Questions - Set 05

Practice Test: Question Set - 05


1. Steam turbines are governed by the following methods
    (A) Throttle governing
    (B) Nozzle control governing
    (C) By-pass governing
    (D) All of the above

2. Belt conveyor can be used to transport coal at inclinations up to
    (A) 30°
    (B) 60°
    (C) 80°
    (D) 90°

3. Caking coals are those which
    (A) Burn completely
    (B) Burn freely
    (C) Do not form ash
    (D) Form lumps or masses of coke

4. The amount of air which is supplied for complete combustion is called
    (A) Primary air
    (B) Secondary air
    (C) Tertiary air
    (D) None of the above

5. Reheat factor is the ratio of
    (A) Isentropic heat drop to useful heat drop
    (B) Adiabatic heat drop to isentropic heat drop
    (C) Cumulative actual enthalpy drop for the stages to total is isentropic enthalpy heat drop
    (D) None of these

6. The percentage O2 by Weight in atmospheric air is
    (A) 18 %
    (B) 23 %
    (C) 77 %
    (D) 79 %

7. The maximum percentage gain in Regenerative feed heating cycle thermal efficiency
    (A) Increases with number of feed heaters increasing
    (B) Decreases with number of feed heaters increasing
    (C) Remains same unaffected by number of feed heaters
    (D) None of the above

8. The draught produced, for a given height of the chimney and given mean temperature of chimney gases
    (A) Decreases with increase in outside air temperature
    (B) Increases with increase in outside air temperature
    (C) Remains the same irrespective of outside air temperature
    (D) May increase or decrease with increase in outside air temperature

9. The efficiency of chimney is approximately
    (A) 80 %
    (B) 40 %
    (C) 20 %
    (D) 0.25 %

10. Reheat factor in steam turbines depends on
    (A) Exit pressure only
    (B) Stage efficiency only
    (C) Initial pressures and temperature only
    (D) All of the above

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