Power Generation

Artificial draught is produced by______________?

A. induced fan
B. forced fan
C. induced and forced fan
D. all of the above

For forced draught system, the function of chimney is mainly_____________?

A. to produce draught to accelerate the combustion of fuel
B. to discharge gases high up in the atmosphere to avoid hazard
C. to reduce the temperature of the hot gases discharged
D. none of the above

The draught produced by steel chimney as compared to that produced by brick chimney for the same height is_____________?

A. less
B. more
C. same
D. may be more or less

The draught produced by chimney of given height at given outside temperature___________?

A. decreases if the chimney gas temperature increases
B. increases if the chimney gas temperature increases
C. remains same irrespective of chimney gas temperature
D. may increase or decrease

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

In a boiler installation the natural draught is produced_____________?

A. due to the fact that furnace gases being light go through the chimney giving place to cold air from outside to rush in
B. due to the fact that pressure at the grate due to cold column is higher than the pressure at the chimney base due to hot column
C. due to the fact that at the chimney top the pressure is more than its environmental pressure
D. all of the above

The draught which a chimney produces is called_____________?

A. induced draught
B. natural draught
C. forced draught
D. balanced draught

The modern steam turbines are___________?

A. impulse turbines
B. reaction turbines
C. impulse-reaction turbines
D. none of the above

Economiser is used to heat_____________?

A. air
B. feed water
C. flue gases
D. all above

A steam power station requires space______________?

A. equal to diesel power station
B. more than diesel power station
C. less than diesel power station