A. conversion of pressure energy into kinetic energy
B. conversion of kinetic energy into pres¬sure energy
C. centripetal action
D. generating pressure directly
E. combination of A. and D.
Related Mcqs:
- The thrust on the rotor in a centrifugal compressor is produced by________________?
A. radial component
B. axial component
C. tangential component
D. resultant component - Losses in a centrifugal compressor are due to__________________?
A. inlet losses
B. impeller channel losses
C. diffuser losses
D. all of the above
E. none of the above - The ratio of outlet whirl velocity to blade velocity in case of centrifugal compressor is called__________________?
A. slip factor
B. velocity factor
C. velocity coefficient
D. blade effectiveness - Axial flow compressor has the following advantage over centrifugal compressor__________________?
A. larger air handling ability per unit frontal area
B. higher pressure ratio per stage
C. aerofoil blades are used
D. higher average velocities
E. none of the above - Maximum delivery pressure is a rotary air compressor is of the order of__________________?
A. 6 kg/cm2
B. 10 kg/cm2
C. 16 kg/cm2
D. 25 kg/cm2
E. 40 kg/cm2 - A jet engine works on the principle of conservation of____________________?
A. mass
B. energy
C. flow
D. linear momentum
E. angular momentum - An ideal air compressor cycle with clearance on p-v diagram can be represented by following processes_______________?
A. one adiabatic, two isobaric, and one constant volume
B. two adiabatic and two isobaric
C. two adiabatic, one isobaric and one constant volume,
D. one adiabatic, one isobaric and two constant volume
E. two isobaric, two adiabatic and one constant volume - Volumetric efficiency of a compressor with clearance volume ________________?
A. increases with increase in compression ratio
B. decreases with increase in compression ratio
C. in not dependent upon compression ratio
D. may increase/decrease depending on compressor capacity
E. unpredictable - The volumetirc efficiency of a compressor is calculated on the basis of __________________?
A. volume of air inhaled at working conditions
B. volume of air inhaled at N.T.P. conditions
C. volume at 0°C and 1 kg/cm2
D. volume at 20°C and 1 kg/cm2
E. none of the above - In a compressor, free air delivered is the actual volume delivered at the stated pressure reduced to ____________________?
A. N.T.P. conditions
B. intake temperature and pressure conditions
C. 0°C and 1 kg/cm2
D. 20°C and 1 kg/cm2
E. none of the above
