Hydraulic Machines

Question: Dynamic similarity is said to exist between the model and the prototype, if both of them
[A].

have identical velocities

[B].

are equal in size and shape

[C].

are identical in shape, but differ only in size

[D].

none of the above

Answer: Option D

Explanation:

No answer description available for this question.

Question: Geometric similarity is said to exist between the model and the prototype, if both of them
[A].

have identical velocities

[B].

are equal in size and shape

[C].

are identical in shape, but differ only in size

[D].

have identical forces

Answer: Option C

Explanation:

No answer description available for this question.

Question: If the ratio’s of the corresponding forces acting at corresponding points are equal, then the model and the prototype are said to have.
[A].

geometric similarity

[B].

kinematic similarity

[C].

dynamic similarity

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: If the ratio of corresponding velocities at corresponding points are equal, then the model and the prototype are said to have dynamic similarity.
[A].

Correct

[B].

Incorrect

Answer: Option B

Explanation:

No answer description available for this question.

Question: If the ratio of all the corresponding linear dimensions are equal, then the model and the prototype are said to have
[A].

geometric similarity

[B].

kinematic similarity

[C].

dynamic similarity

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: Which of the following pump is generally used to pump highly viscous fluid?
[A].

Centrifugal pump

[B].

Reciprocating pump

[C].

Air lift pump

[D].

Screw pump

Answer: Option D

Explanation:

No answer description available for this question.

Question: In order to avoid cavitation in centrifugal pumps
[A].

the suction pressure should be high

[B].

the delivery pressure should be high

[C].

the suction pressure should be low

[D].

the delivery pressure should be low

Answer: Option A

Explanation:

No answer description available for this question.

Question: Which of the following pump is preferred for flood control and irrigation applications?
[A].

Centrifugal pump

[B].

Axial flow pump

[C].

Mixed flow pump

[D].

Reciprocating pump

Answer: Option B

Explanation:

No answer description available for this question.

Question: Which of the following pump is suitable for small discharge and high heads?
[A].

Centrifugal pump

[B].

Axial flow pump

[C].

Mixed flow pump

[D].

Reciprocating pump

Answer: Option D

Explanation:

No answer description available for this question.

Question: If the net positive suction head (NPSH) requirement for the pump is not satisfied, then
[A].

no flow will take place

[B].

cavitation will be formed

[C].

efficiency will be low

[D].

excessive power will be consumed

Answer: Option B

Explanation:

No answer description available for this question.