Related Questions

Gas turbines use following type of air compressor
A Centrifugal type
B Reciprocating type
C Lobe type
D Axial flow type
The variable required to be known in correlations used for estimating the horse power of a centrifugal gas compressor and hence its cost are P. Inlet pressure Q. Compressor rpm R. Delivery pressure S. Volumetric flow rate at inlet.
A P, Q and R
B P and R
C R and S
D P, R and S
The type of rotary compressor used in aeroplanes, is of
A Centrifugal type
B Axial flow type
C Radial flow type
D None of these
The effective power of gas turbines is increased by adding the following in compressor
A Ammonia and water vapour
B Carbon dioxide
C Nitrogen
D Hydrogen
The axial flow compressor is preferred in aircraft gas turbines because of
A Low frontal area
B Higher thrust
C High pressure rise
D None of these
For very low pressure and high discharge rate, the compressor used is a/an __________ compressor.
A Axial
B Reciprocating
C Rotary
D None of these
The maximum delivery pressure in a rotary air compressor is
A 10 bar
B 20 bar
C 30 bar
D 50 bar
The criterion of the thermodynamic efficiency for rotary compressor is
A Isentropic compression
B Isothermal compression
C Polytropic compression
D None of the above
Which of the following motors one will choose to drive the rotary compressor?
A D.C. shunt motor
B D.C. series motor
C Universal motor
D Synchronous motor
The thermodynamic efficiency of rotary compressor is based on
A Isothermal compression
B Adiabatic compression
C Isentropic compression
D Polytropic compression

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