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
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
The pressure compounded impulse turbine as compared to velocity compounded turbine require __________ number of stages.
A Same
B Less
C More
D None of these
The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which
A Delivers unit discharge under unit head
B Delivers unit discharge under unit speed
C Develops unit power under unit head
D Develops unit power under unit speed
Impulse turbine is generally fitted
A At the level of tail race
B Little above the tail race
C Slightly below the tail race
D About 2.5 m above the tail race to avoid cavitations
The maximum number of jets, generally, employed in an impulse turbine without jet interference are
A Two
B Four
C Six
D Eight
In an impulse turbine, steam expands
A Wholly in blades
B Wholly in nozzle
C Partly in the nozzle and partly in blades
D None of these
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 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
In case of impulse steam turbine
A there is enthalpy drop in fixed and moving blades
B there is enthalpy drop only in moving blades
C there is enthalpy drop in nozzles
D none of the above

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