[Solved] In which of the following type of runners the velocity of whirl at inlet is greater than the blade velocity?

McqMate

Q.	In which of the following type of runners the velocity of whirl at inlet is greater than the blade velocity?
A.	such a case is practically impossible
B.	slow runner
C.	medium runner
D.	fast runner
Answer» B. slow runner
Explanation: considering the velocity diagram of francis turbine at the inlet for a slow runner, we notice that the whirl velocity exceeds the blade velocity along the same direction. they are equal in case of a medium runner.

707

0

Do you find this helpful?

3

View all MCQs in

Fluid Mechanics and Machinery

Discussion

No comments yet

Related MCQs

In the figure shown below, which of the following type of runners has the blade curvature as shown in the above figure (The arrow denotes direction of blade motion)?
In the velocity diagrams for Francis turbine, which of the following velocity directions is along the blade curvature?
How is absolute velocity at inlet denoted?
Which of the following runner types will have the highest vane angle at inlet (β1 value)?
Through inlet orifices, which are facing the direction of motion of the ship, the water from the sea can be taken by the pump.
have the highest vane angle at inlet (β1 value)?
In case of a Medium runner, tan (α1) CANNOT be given by (α1 = Guide vane angle at inlet)?
The inlet passage of water entry is controlled by
When a problem states “The velocity of the water flow in a pipe is 20 m/s”, which of the following velocities is it talking about?
Which of the following centrifugal pumps has higher specific speed than the others?