Axial flow compressor resembles____________________ ?
(A) centrifugal pump
(B) reciprocating pump
(C) turbine
(D) sliding vane compressor
(D) none of the above
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
(D) 0.5 kg/cm2
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
(D) 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
(D) 40 kg/cm2
The thermodynamic efficiency of rotary compressor is based on_______________?
(A) isothermal compression
(B) adiabatic compression
(C) isentropic compression
(D) polytropic compression
(D) none of the above
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
(D) production of no air pressure
The maximum compression ratio in an actual single stage axial flow comperssor is of the order of________________?
(A) 1 : 1.2
(B) 1 : 2
(C) 1 : 5
(D) 1 : 10
(D) 1 : 1
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
(D) unpredictable
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
(D) there is no such limitation
Gas turbine works on______________?
(A) Brayton or Atkinson cycle
(B) Carnot cycle
(C) Rankine cycle
(D) Erricsson cycle
(D) Joule cycle