Top 80+ Solved Turbo Machines MCQ Questions Answer
Q. Normal standard of compression for rotary compressor is
a. polytropic compression
b. constant pressure compression
c. isentropic compression
d. adiabatic compression
Q. The continuity equation in compressible fluids is derived on the basis of
a. conservation of velocity head
b. conservation of mass
c. conservation of energy
d. conservation of momentum
Q. Gas turbine used in aircraft is of
a. closed cycle type with reheating and regeneration and intercooling
b. closed cycle type with reheating
c. open cycle type with reheating, regeneration and intercooling
d. open cycle type
Q. With increase in pressure ratio, thermal efficiency of a simple gas turbine plant with fixed turbine inlet temperature
a. increases
b. decreases
c. first increases and then decreases
d. none of the above
Q. The ratio of actual velocity to the local velocity of sound is called
a. Velocity factor
b. Speed ratio
c. Mach number
d. Velicity ratio
Q. Actual gas turbine cycle is different from ideal cycle because
a. of internal irreversibility of the process due to friction, turbulence, etc.
b. of variation of specific heats with temperature
c. of losses due to incomplete combustion
d. all of the above
Q. Gas turbines are taken to
a. the gasoline and diesel engines in its working medium
b. the petrol and diesel engines in its internal combustion
c. the steam turbine in its aspect of steady flow of the working medium
d. All of the above
Q. Which component of a gas turbine consumes maximum power?
a. Combustion chamber
b. Regenerator
c. Starter
d. Compressor
Q. Critical pressure for steam is
a. 185.85 kg/cm2
b. 245.55 kg/cm2
c. 225.65 kg/cm2
d. 212.55 kg/cm2
Q. Which of the following preferred for supercharging of internal combustion engines?
a. Roots blower
b. Reciprocating compressor
c. Sliding vane type compressor
d. Axial flow compressor
Q. Which gas turbine has lest weight per bhp developed?
a. Simple open cycle gas turbine
b. Open cycle gas turbine with intercooling, reheating and regeneration
c. Closed cycle gas turbine
d. Open cycle gas turbine with intercooling and reheating
Q. In which of the following plant inferior quality fuel can be used?
a. Open cycle gas turbine with regeneration
b. Open cycle gas turbine with intercooling
c. Closed cycle gas turbine
d. Open cycle gas turbine with reheating and regeneration
Q. Which of the following loss in steam turbines is negligible?
a. Residual velocity loss
b. Radiation loss
c. Leakage loss
d. Mechanical friction loss
Q. Most serious energy loss in reaction steam turbine
a. Steam leakage between diaphragm and shaft
b. Impact loss as steam enters moving blades
c. Frictional resistance between steam and nozzle side
d. Leakage over blade ends through radia clearance passages
Q. An axial flow compressor is suitable for
a. low volume flow rates with high pressure rise
b. high volume flow rates with a small pressure rise
c. low volume flow rates with low pressure rise
d. high volume flow rates with high pressure rise