Fluid Mechanics

Question: A floating/submerged body is always stable, if its centre of gravity
[A].

lies above its centre of buoyancy.

[B].

and centre of buoyancy coincide.

[C].

lies below its centre of buoyancy.

[D].

lies above its meta centre.

Answer: Option C

Explanation:

No answer description available for this question.

Question: A piezometer opening measures the __________ fluid pressure.
[A].

static

[B].

undisturbed

[C].

total

[D].

dynamic

Answer: Option B

Explanation:

No answer description available for this question.

Question: In case of a centrifugal pump, the ratio of total delivered pressure to pressure developed with the impeller is called the __________ efficiency.
[A].

manometric

[B].

mechanical

[C].

volumetric

[D].

overall

Answer: Option A

Explanation:

No answer description available for this question.

Question: Which of the following quantities are computed by using the hydraulic radius for non-circular ducts ?
[A].

Velocity and relative roughness.

[B].

Head loss and velocity.

[C].

Reynold number, relative roughness and head loss.

[D].

Reynolds number and friction factor.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Liquid delivery by centrifugal pump starts, only when the head developed by it is equal to the __________ head.
[A].

manometric

[B].

total

[C].

static

[D].

friction

Answer: Option A

Explanation:

No answer description available for this question.

Question: Gradually varied flow in open channel is a/an __________ flow.
[A].

steady uniform

[B].

steady non-uniform

[C].

unsteady uniform

[D].

unsteady non-uniform

Answer: Option B

Explanation:

No answer description available for this question.

Question: A pressure of 10 m head of water is equivalent to __________ kN/m2.
[A].

98

[B].

147

[C].

196

[D].

49

Answer: Option A

Explanation:

No answer description available for this question.

Question: One dimensional fluid flow implies the
[A].

flow in straight lines only.

[B].

uniform flow.

[C].

steady uniform flow.

[D].

flow in which transverse components are zero.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Bernoulli’s equation describes the
[A].

mechanical energy balance in potential flow.

[B].

kinetic energy balance in laminar flow.

[C].

mechanical energy balance in turbulent flow.

[D].

mechanical energy balance in boundary layer.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Pascal law is not applicable for a/an __________ fluid.
[A].

accelerating frictionless

[B].

static

[C].

uniformly moving

[D].

none of these

Answer: Option D

Explanation:

No answer description available for this question.