Question:

The energy transfer between the hot fluid and cold fluids is brought about by their complete physical mixing in

A.

direct contact heat exchanger

B.

regenerators

C.

recuperators

D.

boilers

Answer» a. direct contact heat exchanger

Question:

For sharp edge orifice, coefficient of discharge lies between ___________

A.

0.61 – 0.64

B.

0.87 – 0.89

C.

0.50 – 0.61

D.

none of the mentioned

Answer» a. 0.61 – 0.64

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:

Which fuel has higher thermodynamic efficiency in liquid fuels?

A.

diesel

B.

petrol

C.

kerosene

D.

lpg

Answer» a. diesel

Question:

Which among the following is the formula for mass flow rate?

A.

q = m/p

B.

q = mp

C.

q = m + p

D.

q = m – p

Answer» b. q = mp

Question:

Non Condensing steam turbine can also be called as                    

A.

extraction steam turbine

B.

back pressure steam turbine

C.

impulse steam turbine

D.

none of the mentioned

Answer» b. back pressure steam turbine

Question:

When the cross-section of a nozzle increases continuously from entrance to exit, it is called a                          

A.

convergent-divergent nozzle

B.

divergent nozzle

C.

convergent nozzle

D.

none of the mentioned

Answer» b. divergent nozzle

Question:

What is the function of fusible plug in the boiler?

A.

protect the fire tube

B.

to trip on overload

C.

to act as a junction switch

D.

to maintain pressure

Answer» a. protect the fire tube

Question:

When a gas is pushed through a pipe, the gaseous molecules are by the pipe’s walls

A.

attracted

B.

absorbed

C.

deflected

D.

dissipated

Answer» c. deflected

Question:

In the aqua-ammonia absorption system,

A.

water is the refrigerant and ammonia is the absorbent

B.

ammonia is the refrigerant and water is the absorbent

C.

both ammonia and water can be used as refrigerant or absorbent

D.

none of the mentioned

Answer» b. ammonia is the refrigerant and water is the absorbent