Caking coals are those which__________?

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

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

The efficiency of a modern boiler using coal and heat recovery equipment is about_____________?

A. 25 to 30%
B. 40 to 50%
C. 65 to 70%
D. 85 to 90%

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

Which material is used to made a solar cell_______________?

A. aluminum
B. Germanium
C. silicon
D. scandium

In a regenerative feed heating cycle, the greatest economy is affected___________?

A. when steam is extracted from only one suitable point of steam turbine
B. when steam is extracted from several places in different stages of steam turbine
C. when steam is extracted only from the last stage of steam turbine
D. when steam is extracted only from the first stage of steam turbine