Question:

What is the function of the feed water pump of a boiler?

A.

pump water at high pressure

B.

to pump water at lower pressure

C.

to pull back the water from boiler

D.

to convert steam into water after the boiler process

Answer» a. pump water at high pressure

Question:

What is the function Air heater in the boiler?

A.

preheat the air before entering the boiler

B.

recover the heat from flue gas

C.

heating of economizer tubes

D.

reheat the gas coming out of economizer

Answer» b. recover the heat from flue gas

Question:

Which among the following fuels need excess amount of air for complete combustion?

A.

natural fuels

B.

liquid fuels

C.

gaseous fuels

D.

artificial solid fuels

Answer» d. artificial solid fuels

Question:

Water is used as a in air conditioning units.

A.

absorbent

B.

refrigerant

C.

absorbent and refrigerant

D.

none of the mentioned

Answer» b. refrigerant