Power Generation

Deaerative heating is done to_____________?

Deaerative heating is done to
A. heat the water
B. heat the air in the water
C. remove dissolved gases in the water

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

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

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

Example of overfeed type stoker is___________?

A. chain grate
B. spreader
C. travelling grate
D. all of the above

Under-feed stokers work best for _________ coals high in volatile matter and with caking tendency?

A. anthracite
B. lignite
C. semibituminous and bituminous

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

The amount of air which is supplied for complete combustion is called___________?

A. primary air
B. secondary air
C. tertiary air

Bucket elevators are used for___________?

A. carrying coal in horizontal direction
B. carrying coal in vertical direction
C. carrying coal in any direction

Method which is commonly applied for unloading the coal for small power plant is___________?

A. lift trucks
B. coal accelerators
C. tower cranes
D. belt conveyor