The volumetric efficiency of compressor with increase in compression ratio will :
A. increase
B. decrease
C. remain same
D. may increase/decrease
Axial flow compressor resembles :
A. centrifugal pump
B. reciprocating pump
C. turbine
D. sliding vane compressor
Atmospheric pressure is 1.03 kg/cm and vapour pressure is 0.03 kg/cm . The air pressure will be :
A. 1.03 kg/cm2
B. 1.06 kg/cm2
C. 1.00 kg/cm2
D. 0.53 kg/cm2
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
The thermodynamic efficiency of rotary compressor is based on :
A. isothermal compression
B. adiabatic compression
C. isentropic compression
D. polytrophic compression
Surging is the phenomenon of :
A. air stream blocking the passage
B. motion of air at sonic velocity
C. unsteady, periodic and reversed flow
D. air stream not able to follow the blade contour
The fuel consumption in gas turbines is accounted for by :
A. low.er heating value
B. higher heating value
C. heating value
D. higher calorific value
The pressure ratio for an open cycle gas turbine compared to closed cycle gas turbine of same h.p. is :
A. low
B. high
C. same
D. low/high depending on make and type
Rotary compressors are suitable for :
A. large discharge at high pressure
B. low discharge at high pressure
C. large discharge at low pressure
D. low discharge at low pressure
Gas turbine works on :
A. Brayton or Atkinson cycle
B. Carnot cycle
C. Rankine cycle
D. Ericson cycle
Gas turbine works on :
A. Brayton or Atkinson cycle
B. Carnot cycle
C. Rankine cycle
D. Ericson cycle
