Hydraulic Machines

Question: In a Francis turbine, the pressure at inlet is __________ that at outlet.
[A].

less than

[B].

more than

Answer: Option B

Explanation:

No answer description available for this question.

Question: In a Kaplan turbine runner, the number of blades are generally between
[A].

2 to 4

[B].

4 to 8

[C].

8 to l6

[D].

16 to 24

Answer: Option B

Explanation:

No answer description available for this question.

Question: In a Francis turbine runner, the number of blades are generally between
[A].

2 to 4

[B].

4 to 8

[C].

8 to l6

[D].

16 to 24

Answer: Option D

Explanation:

No answer description available for this question.

Question: A Kaplan turbine is an axial flow reaction turbine.
[A].

Correct

[B].

Incorrect

Answer: Option A

Explanation:

No answer description available for this question.

Question: A Francis turbine is an outward flow reaction turbine.
[A].

True

[B].

False

Answer: Option B

Explanation:

No answer description available for this question.

Question: In a mixed flow reaction turbine, the flow of water is partly radial and partly axial.
[A].

Correct

[B].

Incorrect

Answer: Option A

Explanation:

No answer description available for this question.

Question: In an outward flow reaction turbine
[A].

the water flows parallel to the axis of the wheel

[B].

the water enters at the centre of the wheel and then flows towards the outer periphery of the wheel

[C].

the water enters the wheel at the outer periphery and then flows towards the centre of the wheel

[D].

the flow of water is partly radial and partly axial

Answer: Option B

Explanation:

No answer description available for this question.

Question: In an axial flow reaction turbine, the water flows __________ to the axis of the wheel.
[A].

parallel

[B].

perpendicular

Answer: Option A

Explanation:

No answer description available for this question.

Question: In an inward flow reaction turbine
[A].

the water flows parallel to the axis of the wheel

[B].

the water enters at the centre of the wheel and then flows towards the outer periphery of the wheel

[C].

the water enters the wheel at the outer periphery and then flows towards the centre of the wheel

[D].

the flow of water is partly radial and partly axial

Answer: Option C

Explanation:

No answer description available for this question.

Question: In a reaction turbine, the draft tube is used
[A].

to run the turbine full

[B].

to prevent air to enter the turbine

[C].

to increase the head of water by an amount equal to the height of the runner outlet above the tail race

[D].

to transport water to downstream

Answer: Option C

Explanation:

No answer description available for this question.