Power System - I (3140914) MCQs

MCQs of Conventional Generation, Load Curves and Tariffs

Showing 91 to 100 out of 425 Questions
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91.
Critical pressure for steam is in the range of
(a) 50 – 100 kg/cm2
(b) 100 – 200 kg/cm2
(c) 200 – 250 kg/cm2
(d) Above 300 kg/cm2
Answer:

Option (c)

92.
A super critical boiler is one that operates above the pressure and temperature of the following values
(a) 100 kg/cm2 and 540° C
(b) 218 kg/cm2 and 540° C
(c) 100 kg/cm2 and 373° C
(d) 218 kg/cm2 and 373° C
Answer:

Option (b)

93.
In a boiler, the carry over of slugs of water into the piping because of dirty water is called the
(a) Foaming
(b) Pitting
(c) Scalping
(d) Beating
Answer:

Option (a)

94.
Which of the following steam will have least enthalpy?
(a) Dry and saturated steam at 25 kg/cm2
(b) Wet steam at 25 kg/cm2
(c) Super-heated steam at 25 kg/cm2
(d) All of the above will have the same enthalpy
Answer:

Option (b)

95.
The boilers using lignite as fuel do not use
(a) Spreader stoker
(b) Traveling grate stoker
(c) Underfeed stoker
(d) All of above
Answer:

Option (c)

96.
Pipes carrying steam are generally of
(a) Steel
(b) Cast iron
(c) Aluminum
(d) Cobalt
Answer:

Option (a)

97.
For given power a water tube boiler occupies
(a) Less floor area and less height
(b) More floor area and less height
(c) Less floor area and more height
(d) More floor area and more height than a fire tube boiler
Answer:

Option (c)

98.
The selection of the type and size of a steam boiler depends upon
(a) The power required and working pressure
(b) The geographical position of the power house
(c) The fuel and water availability
(d) All of above
Answer:

Option (a)

99.
In a super heater
(a) Pressure rises and temperature drops
(b) Temperature rises and pressure drops
(c) Temperature rises and pressure remains unchanged
(d) Pressure rises and temperature remains the same
Answer:

Option (c)

100.
Within the boiler, the steam has highest temperature in
(a) Super heater
(b) Water tubes
(c) Water walls
(d) Water drum
Answer:

Option (a)

Showing 91 to 100 out of 425 Questions
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