Fluid Mechanics

Question: Buoyant force
[A].

for non-symmetrical bodies is not vertical.

[B].

depends on the depth of the submergence of the floating body.

[C].

depends on the weight of the floating body.

[D].

none of these.

Answer: Option C

Explanation:

No answer description available for this question.

Question: A hydraulic press has a ram of 10 cms in diameter and a plunger of 1 cm in diameter. The force required on the plunger to raise a weight of 10 tons on the ram is __________ kg.
[A].

10

[B].

100

[C].

1000

[D].

10000

Answer: Option B

Explanation:

No answer description available for this question.

Question: In open channel flow in a rectangular channel, the ratio between the critical depth and the initial depth, when a hydraulic jump occurs is
[A].

0.5

[B].

0.84

[C].

1.84

[D].

1.25

Answer: Option C

Explanation:

No answer description available for this question.

Question: The capacity of an accumulator is the maximum
[A].

energy which it can store.

[B].

discharge which it can deliver.

[C].

liquid which it can store.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Air vessel fitted to a reciprocating pump
[A].

increases the work done.

[B].

decreases the work done.

[C].

causes cavitation.

[D].

results in non-uniform discharge.

Answer: Option B

Explanation:

No answer description available for this question.

Question: For a reciprocating pump, the indicator diagram is the graph between the
[A].

discharge and overall efficiency.

[B].

volume swept by piston for one complete revolution and the pressure in the cylinder.

[C].

angle swept by the crank pin at any instant and the discharge.

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: In isotropic turbulence, the __________ are equal to each other.
[A].

temporal velocity components

[B].

mean square of velocity fluctuations in the three co-ordinate directions

[C].

root mean square of velocity fluctuations in the three co-ordinate directions

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: In a free vortex, the
[A].

velocity changes linearly with radial distance.

[B].

flow is necessarily rotational.

[C].

radial component of velocity is same everywhere.

[D].

stream lines are not circular.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Normal depth in open channel flow is the depth of flow in the channel
[A].

corresponding to uniform flow.

[B].

measured normal to the channel bed.

[C].

corresponding to steady flow.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Drag is the force component exerted on an immersed object,
[A].

passing the centroid of the body at 60°to the direction of motion.

[B].

the component being parallel to theflow direction.

[C].

the component being normal to the flow direction.

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.