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:

Gas flows through the nozzle from an area of pressure (called the chamber) to one of pressure

A.

high, low

B.

low, high

C.

same, same

D.

constant, infinite

Answer» a. high, low

Question:

Rateau turbine is                          

A.

pressure-velocity compounded turbine

B.

simple reaction turbine

C.

velocity compounded turbine

D.

pressure compounded turbine

Answer» d. pressure compounded turbine

Question:

For a compressible, ideal gas, mass flow rate depends on parameters such as flow area, pressure, temperature, properties of the gas, and                    

A.

avogardo’s number

B.

mach number

C.

reynold’s number

D.

le-grange’ number

Answer» b. mach number

Question:

De-Laval turbine is a                          

A.

multi rotor impulse turbine

B.

impulse reaction turbine

C.

single rotor impulse turbine

D.

none of the mentioned

Answer» c. single rotor impulse turbine

Question:

The steam leaves the nozzle at a

A.

low pressure and a high velocity

B.

high pressure and a high velocity

C.

high pressure and a low velocity

D.

low pressure and a low velocity

Answer» a. low pressure and a high velocity

Question:

In rocket engines the amount of expansion in Nozzle determines the                      

A.

exit temperature

B.

exit pressure

C.

exit temperature & pressure

D.

none of the mentioned

Answer» c. exit temperature & pressure

Question:

One tonne of refrigeration is given as the rate of heat removal from surroundings equivalent to heat required for melting one tonne of ice in a day.

A.

true

B.

false

Answer» a. true

Question:

Pumps increase                      

A.

pressure

B.

velocity

C.

momentum

D.

heat

Answer» a. pressure

Question:

Impulse blades are in the shape of

A.

rain drop

B.

circular

C.

half moon

D.

none of the mentioned

Answer» c. half moon