Question:

Which of the following is not a type of steam turbine?

A.

impulse turbine

B.

reaction turbine

C.

pelton wheel turbine

D.

axial flow type turbine

Answer» c. pelton wheel turbine

Question:

The expansion process is

A.

isentropic

B.

reversible

C.

adiabatic

D.

all of the mentioned

Answer» c. adiabatic

Question:

What is the function of safety valves in the boiler?

A.

to prevent excessive steam pressure

B.

to prevent excessive air pressure

C.

to prevent water pressure

D.

to prevent from rising temperatures

Answer» a. to prevent excessive steam 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:

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