A. centrifugal
B. reciprocating
C. axial
D. screw
E. turbo jet
A. increase velocity
B. make the flow stream-line
C. convert pressure energy into kinetic energy
D. convert kinetic energy into pressure energy
E. increase degree of reaction
Diffuser in a compressor is used to _____________________? Read More »
Compressors, Gas Turbines and Jet Engines A. no flow of air
B. fixed mass flow rate regardless of pressure ratio
C. reducing mass flow rate with increase in pressure ratio
D. increased inclination of chord with air steam
E. does not occur
Phenomenon of choking in compressor means __________________? Read More »
Compressors, Gas Turbines and Jet Engines A. pressure coefficient
B. work coefficient
C. polytropic reaction
D. slip factor
E. compressor efficiency
The ratio of isentropic work to Euler work is known as_____________________? Read More »
Compressors, Gas Turbines and Jet Engines A. directly proportional to clearance volume
B. greatly affected by clearance volume
C. not affected by clearance volume
D. inversely proportional to clearance volume
The indicated work per unit mass of air delivered is___________________? Read More »
Compressors, Gas Turbines and Jet Engines A. increase
B. decrease
C. remain unaffected
D. may increase/decrease depending on compressor clearance
E. none of the above
A. lower power consumption per unit of air delivered
B. higher volumetric efficiency
C. decreased discharge temperature
D. moisture free air
E. all of the above
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
A. 0.1%
B. 0.5%
C. 1.0%
D. 5%
E. 10%.
A. start-stop motor
B. constant speed unloader
C. relief valve
D. variable speed
E. none of the above
