Fluid Mechanics

Question: Foot valves provided in pumps are __________ valves.
[A].

relief

[B].

three/four way

[C].

pressure reducing

[D].

directional control

Answer: Option D

Explanation:

No answer description available for this question.

Question: In parallel pipe problems, the
[A].

head loss is the same through each pipe.

[B].

discharge is the same through all the pipes.

[C].

total head loss is equal to the sum of the head losses through each pipe.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Centrifugal pump is normally classified on the basis of the
[A].

rpm.

[B].

type of casing.

[C].

impeller blade angle.

[D].

number of blades in impeller.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Design of the casing of centrifugal pump should be such as to minimise the
[A].

back flow through impeller

[B].

loss of kinetic head

[C].

loss of static head

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: A relief valve
[A].

provides back pressure for a cylinder.

[B].

unloads a pump.

[C].

is a directional control valve.

[D].

none of these.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Cavitation in a centrifugal pump can be avoided by keeping the
[A].

inlet pressure high

[B].

outlet pressure low

[C].

inlet pressure low

[D].

outlet pressure high

Answer: Option A

Explanation:

No answer description available for this question.

Question: Acceleration head in a reciprocating pump
[A].

increases the work done during delivery stroke.

[B].

decreases the work done during suction stroke.

[C].

does not change the work requirement of the pump.

[D].

increases the work done during suction stroke.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Air vessel provided in a reciprocating pump is for
[A].

increasing the acceleration head.

[B].

making the friction in pipe uniform.

[C].

decreasing the acceleration head.

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: A double acting reciprocating pump compared to a single acting pump (of almost same size working under same pressure levels) would give almost double
[A].

head

[B].

discharge

[C].

efficiency

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: In frictional fluid flow, the quantity, , is
[A].

constant along a streamline.

[B].

not constant along a streamline.

[C].

increased in the direction of flow.

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.