Question:

Which fuel is produced by powdering low grade coal with high ash content?

A.

coke

B.

pulverized coal

C.

charcoal

D.

briquette coal

Answer» b. pulverized coal

Question:

Isentropic nozzle flow states about the movement of a gas or fluid through a narrow orifice without an increase or decrease in

A.

accelerating

B.

decelerating

C.

equilibrium

D.

exponential increase

Answer» b. decelerating

Question:

What is the advantage of having smaller ratio of water to steam space?

A.

steam can be generated at a faster even if the boiler is cold

B.

increases the rate of evaporation

C.

water is made cyclic, i.e., from boiler drum to water tube and back to drum

D.

helps in mobilizing the boiler

Answer» a. steam can be generated at a faster even if the boiler is cold

Question:

A velocity compounded impulse turbine is also called as                      

A.

curtis wheel

B.

pressure compounded

C.

curtis wheel & pressure compounded

D.

none of the mentioned

Answer» a. curtis wheel

Question:

Which of the following statement is true?

A.

ammonia vapour is absorbed in water

B.

boiling point of ammonia is more than that of water

C.

both of the mentioned

D.

none of the mentioned

Answer» a. ammonia vapour is absorbed in water

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

Question:

If the speed of sound is much                   than that of the gas, the gas density will stay constant.

A.

smaller

B.

larger

C.

equal to

D.

non-existent

Answer» b. larger

Question:

What is the function of superheater in the boiler?

A.

increase the temperature of steam

B.

reheat the steam

C.

superheat the feed water

D.

to heat the fuel gas

Answer» a. increase the temperature of steam

Question:

Which of the following kinetic friction is smaller?

A.

limiting friction

B.

static friction

C.

rolling friction

D.

sliding friction

Answer» c. rolling friction