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

Question:

When steam reaches turbine blades the type of force responsible for moving turbine blades are                            

A.

axial force

B.

shear force

C.

longitudinal force

D.

none of the mentioned

Answer» a. axial force

Question:

A train has to negotiate a curve of radius 400m. By how much should the putter rail be raised with respect to inner rail for speed of 48 km/h? The distance between the rails is 1m.

A.

0.20m

B.

0.0454m c) 0.45m

C.

d) 0.020m

Answer» b. 0.0454m c) 0.45m

Question:

In absorption system, compressor in vapour compression cycle is replaced by absorber- generator assembly.

A.

true

B.

false

Answer» a. true

Question:

Which fuel is heavier than petrol but less volatile and it is commonly used as domestic fuel?

A.

diesel

B.

distilled fuel

C.

kerosene

D.

alcohol

Answer» c. kerosene

Question:

Which type of boilers use orifice to control the flow circulation?

A.

natural circulation boilers

B.

forced convection boilers

C.

once-through boilers

D.

positive forced circulation boilers

Answer» b. forced convection boilers