Economiser is used to heat_____________?
Economiser is used to heat_____________?
A. air
B. feed water
C. flue gases
D. all above
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The cooling section in the surface condenser__________?
The cooling section in the surface condenser__________?
A. increases the quantity of vapour extracted along with air
B. reduces the quantity of vapour extracted along with air
C. does not affect vapour quantity extracted but reduces pump capacity of air extraction pump
D. none of the aboveThe draught in locomotive boilers is produced by_____________?
The draught in locomotive boilers is produced by_____________?
A. forced fan
B. chimney
C. steam jet
D. only motion of locomotiveThe pressure on the two sides of the impulse wheel of a steam turbine_____?
The pressure on the two sides of the impulse wheel of a steam turbine_____?
A. is same
B. is different
C. increases from one side to the other side
D. decreases from one side to the other sideSteam turbines are governed by the following methods_____________?
Steam turbines are governed by the following methods_____________?
A. Throttle governing
B. Nozzle control governing
C. By-pass governing
D. all of the aboveRankine cycle efficiency of a good steam power plant may be in the range of____________?
Rankine cycle efficiency of a good steam power plant may be in the range of____________?
A. 15 to 20 per cent
B. 35 to 45 per cent
C. 70 to 80 per cent
D. 90 to 95 per ceutOne kilowatt hour is equal to_________?
One kilowatt hour is equal to_________?
A. 532 k cal.
B. 735 k cal.
C. 746 k cal.
D. 860 k cal.