Related Questions

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
Which type of turbine is a Francis Turbine?
A Impulse Turbine
B Screw Turbine
C Reaction turbine
D Turgo turbine
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 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
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
In a Francis 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
Francis turbine is best suited for
A Medium head application from 24 to 180 m
B Low head installation up to 30 m
C High head installation above 180 m
D All types of heads
There is a certain pressure ratio (optimum) for a gas turbine at which its thermal efficiency is maximum. With increase in turbine temperature, the value of pressure ratio for the peak efficiency would
A Remain same
B Decrease
C Increase
D None of the above
If A varies directly proportional to C and B also varies directly proportional to C, which one of the following is not correct ?
A $$\left( {A + B} \right)\alpha \,C$$
B $$\left( {A - B} \right)\alpha \,\frac{1}{C}$$
C $$\sqrt {AB} \,\alpha \,C$$
D $$\frac{A}{B} = {\text{constant}}$$
The speed of an imaginary turbine, identical with the given turbine, which will develop a unit power under a unit head, is known as
A Normal speed
B Unit speed
C Specific speed
D None of these

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