Tricky Power Plant Engineering Multiple choice Questions and Answers pdf

91.    In ______ system fuel from a central pulverizing unit is delivered to a bunker and then to the various burners
(a) unit 
(b) central
(c) none of the above
Ans: b

92.    Under-feed stokers work best for _______ coals high in volatile matter and with caking tendency
(a) anthracite 
(b) lignite
(c) semibituminous and bituminous
Ans: c

93.    Example of overfeed type stoker is
(a)     chain grate     
(b)     spreader
(c)    travelling grate
(d)    all of the above
Ans: d

94.    Where unpulverised coal has to be used and boiler capacity is large, the stoker which is used is
(a) underfeed stoker
(b) overfeed stoker
(c) any
Ans: b

95. TravelUng grate stoker can burn coals at the rates of
(a)    50—75 kg/m  per hour
(b)    75—100 kg/m per hour
(c)    100—150 kg/m per hour
(d)    150—200 kg/m2 per hour
Ans: d

96. Blowing down of boiler water is the process
(a)    to reduce the boiler pressure
(b)    to increase the steam temperature
(c)    to control the solid concentration in the boiler water by removing some of the concentrated saline water
(d)    none of the above
Ans: c

97. Deaerative heating is done to
(a)    heat the water
(b)    heat the air in the water
(c)    remove dissolved gases in the water
Ans: c

98. 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
Ans: c

99. The value of the reheat factor is of the order of
(a) 0.8 to 1.0 
(b) 1.0 to 1.05
(c) 1.1 to 1.5 
(d) above 1.5
Ans: c

100.    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
Ans: c

Read More Questions:
Power Plant Engineering MCQs Part1
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