A. cool the air
B. decrease the delivery temperature for ease in handling
C. cause moisture and oil vapour to drop out
D. reduce volume
E. increase pressure
Related Mcqs:
- 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 main purpose of reheating in gas turbine is to__________________?
A. increase temperature
B. reduce turbine size
C. increase power output
D. increase speed
E. increase pressure ratio - 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 thrust on the rotor in a centrifugal compressor is produced by________________?
A. radial component
B. axial component
C. tangential component
D. resultant component - 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 - 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 - Water gas is produced by ___________________ ?
A. carbonisation of coal
B. passing steam over incandescent coke
C. passing air and a large amount of steam over waste coal at about 65°C
D. partial combustion of caol, eke, anthractie coal or charcoal in a mixed air steam blast
E. same way as the natural gas - In the cross compounding of the gas turbine plant__________________?
A. h.p. compressor L connected to h.p. turbine and l.p. compressor ot l.p. tur-bine
B. h.p. compressor is connected to l.p. turbine and l.p. compressor is con-nected to h.p. turbine
C. both the arrangements can be employed
D. all are connected in series
E. none of the above - If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix i and o stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity______________?
A. Vi=V0B
B. Vt>V0
C. U,<V0
D. V,= U0
E. Vri=Vm
