Secondary air is the air used to______________?
A. reduce the flame length
B. increase the flame length
C. transport and dry the coal
D. provide air round the burners for getting optimum combustion
The voltage of a single solar cells is about
A. 0.5 volt
B. 1 volt
C. 1.8 volt
D. 1. 5 volt
In a shell and tube surface condenser____________?
A. steam and cooling water mix to give the condensate
B. cooling water passes through the tubes and steam surrounds them
C. steam passes through the cooling tubes and cooling water surrounds them
D. all of the above varying with situation
In a steam power plant, the function of a condenser is__________?
A. to maintain pressure below atmospheric to increase work output from the primemover
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
Which of the following power plant has highest Depreciation charges?
A. Thermal plant
B. Diesel plant
C. Hydroelectric plant
D. All have same
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 above
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