Related Questions

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 ratio of the workdone on the blades to the energy supplied to the blades, is called
A Blading efficiency
B Nozzle efficiency
C Gross or stage efficiency
D Mechanical efficiency
The blades of a centrifugal impeller are said to be curved forward, if the __________ of the motion of impeller blades.
A Inlet tip of a blade curves in a direction opposite to that
B Outlet tip of a blade curves in a direction opposite to that
C Inlet tip of a blade is towards the direction
D Outlet tip of a blade is towards the direction
Gas turbine blades are given a rake
A Equal to zero
B In the direction of motion of blades
C Opposite to the direction of motion of blades
D Depending on the velocity
The most preferred process for casting gas turbine blades is
A Die casting
B Shell moulding
C Investment moulding
D Sand casting
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
A closed cycle gas turbine gives ________ efficiency as compared to an open cycle gas turbine.
A Same
B Lower
C Higher
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
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 isentropic enthalpy drop in moving blade is two-third of the isentropic enthalpy drop in fixed blades of a turbine. The degree of reaction will be
A 0.4
B 0.56
C 0.67
D 1.67

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