The nozzle efficiency is the ratio of

A)
workdone on the blades to the energy supplied to the blades
B)
workdone on the blades per kg of steam to the total energy supplied per stage per kg of steam
C)
energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam
D)
None of the above

Correct Answer : Option (C) :   energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam

Recently Updated in Steam Nozzles and Turbines Questions
The impulse turbine rotor efficiency will have a maximum value of 0.5 cos2 α, where α is the nozzle exit flow angle, if the
A)
blades are equiangular
B)
blade solidity is 0.65
C)
blade velocity coefficient is unity
D)
blades are equiangular and frictionless

Correct Answer :   blades are equiangular and frictionless

Rateau turbine is
A)
velocity compounded turbine
B)
simple reaction turbine
C)
pressure-velocity compounded turbine
D)
pressure compounded turbine

Correct Answer :   pressure compounded turbine

The flow of steam is super-sonic
A)
at the throat of the nozzle
B)
in the divergent portion of the nozzle
C)
at the entrance to the nozzle
D)
in the convergent portion of the nozzle

Correct Answer :   in the divergent portion of the nozzle

Mechanical Engineering MCQ's

Theory of Machines
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