Related Questions

In a Kaplan turbine runner, the numbers of blades are generally between
A 2 to 4
B 4 to 8
C 8 to 16
D 16 to 24
Which type of turbine is a Francis Turbine?
A Impulse Turbine
B Screw Turbine
C Reaction turbine
D Turgo turbine
which of the following components of reaction turbine increases the head on the turbine by an amount equal to the height of runner outlet above the tail race ?
A Scroll casing
B Guide vanes
C Draft tube
D Moving vanes
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
A Francis turbine is used when the available head of water is
A 0 to 25 m
B 25 m to 250 m
C Above 250 m
D None of these
The flow ratio of Francis turbine is defined as the ratio of the
A Velocity of flow at inlet to the theoretical jet velocity
B Theoretical velocity of jet to the velocity of flow at inlet
C Velocity of runner at inlet to the velocity of flow at inlet
D None of the above
The flow ratio in case of Francis turbine varies from
A 0.15 to 0.3
B 0.4 to 0.5
C 0.6 to 0.9
D 1 to 1.5
The speed ratio in case of Francis turbine varies from
A 0.15 to 0.3
B 0.4 to 0.5
C 0.6 to 0.9
D 1 to 1.5

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