Related Questions

The efficiency of a pressure-velocity compounded impulse turbine is __________ as compared to pressure compounded impulse turbine.
A Same
B Less
C More
D None of these
The pressure velocity compounded impulse turbine allows a bigger pressure drop and hence __________ numbers of stages are required.
A More
B Less
C Equal
D None of these
An impulse turbine as compared to a reaction turbine, for a given power has _________ row of blades.
A Equal
B Less
C More
D None of these
In a velocity compounded impulse turbine, when steam flows through the second row of moving blades,
A Velocity increases
B Velocity decreases
C Velocity remains constant
D Pressure remains constant
The hydraulic efficiency of an impulse turbine is maximum when velocity of wheel is _______ of the jet velocity,
A One-fourth
B One-half
C Three-fourth
D Double
The blade friction in the impulse turbine reduces the velocity of steam by __________ while it passes over the blades.
A 10 to 15%
B 15 to 20%
C 20 to 30%
D 30 to 40%
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
The blade friction in the impulse turbine reduces the velocity of steam by _____ while it passes over the blades.
A 10-15%
B 15-20%
C 20-30%
D 30-40%
In impulse turbines, when friction is neglected, the relative velocity of steam at outlet tip of the blade is _________ the relative velocity of steam at inlet tip of the blade.
A Equal to
B Less than
C Greater than
D None of these
The pressure on the two sides of the impulse wheel of a steam turbine
A is same
B is different
C increases from one side to the other side
D decreases from one side to the other side

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