If stage efficiency is S, blade efficiency is B and nozzle efficiency in N, then
A.N = B.S
B.S = B.N
C.B = SN
D.BSN = 1
Category: Turbo machines Mcqs
In a reheating gas turbine cycle, reheating is done
A.by gases from turbine exhaust
B.by gases from intercooler
C.in separate combustion chamber
D.any of the above
Which of the following fluid can be used in binary vapour cycle?
A.Mercury
B.Diphenyl oxide
C.Aluminium bromide
D.any of the above
Which of the following is the smallest and lighest for generating a given amount of power
A.Steam power plant
B.Petrol engine
C.Diesel engine
D.Solar plant
E.Gas turbine plant
The ratio of outlet whirl velocity to blade velocity in case of centrifugal compressor is called
A.slip factor
B.Velocity ratio
C.Blade efficiency
D.Diagram efficiency
The diverging portion of the nozzle acts as a diffuser for
A.the subsonic flow
B.the supersonic flow
C.both the subsonic as well as supersonic flow
D.none of the above
Choking is
A.Variation of mass flow rate in proportion to pressure ratio
B.variation of mass flow rate in inverse proportion to pressure ratio
C.fixed mass flow rate regardless of pressure ratio
D.none of the above
Curtis turbine is
A.in impulse turbine
B.a velocity compounded turbine
C.a pressure compounded turbine
D.a velocity pressure compounded turbine
Ljungstrom steam turbine is a
A.radial flow turbine
B.axial flow turbine
C.mixed flow turbine
D.any of the above
In an axial flow compressor, the pressure rise occurs in
A.fixed blades only
B.Moving blades only
C.Both fixed and moving blades
D.none of the above
