Fluid Mechanics

Question: As per Newton’s law of viscosity, the shear stress for a given rate of angular deformation of fluid is proportional to(where, μ = fluid viscosity)
[A].

1/μ

[B].

μ

[C].

μ2

[D].

1/μ2

Answer: Option B

Explanation:

No answer description available for this question.

Question: A fluid which has a linear relationship between the magnitude of applied shear-stress and the resulting rate of deformation is called a/an __________ fluid.
[A].

Newtonion

[B].

Non-Newtonion

[C].

ideal

[D].

incompressible

Answer: Option A

Explanation:

No answer description available for this question.

Question: One horsepower is equal to
[A].

550 lbf.ft/second

[B].

550 kgf.m/second

[C].

both (a) and (b)

[D].

550 lbf.ft./hr

Answer: Option A

Explanation:

No answer description available for this question.

Question: __________ is an example of axial flow impeller.
[A].

Paddle

[B].

Turbine

[C].

Propeller

[D].

all (a), (b) and(c)

Answer: Option C

Explanation:

No answer description available for this question.

Question: Permanent loss in a venturimeter is about __________ percent of the pressure drop in theupstream cone.
[A].

1

[B].

10 .

[C].

40

[D].

70

Answer: Option B

Explanation:

No answer description available for this question.

Question: If Blausius or Darcey friction factor is ‘f1’ then the Fanning friction factor is equal to
[A].

f1/4

[B].

4f2

[C].

2f1

[D].

f1/2

Answer: Option A

Explanation:

No answer description available for this question.

Question: Experimental study of laminar fluid flow through a circular tube was conducted by
[A].

Reynolds

[B].

Hagen and Poiseuille

[C].

Pascal

[D].

Blake-Plummer

Answer: Option B

Explanation:

No answer description available for this question.

Question: A venturimeter measures the
[A].

velocity head

[B].

pressure

[C].

point velocity

[D].

none of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: Isotropic turbulence occurs
[A].

where there is no velocity gradient.

[B].

at higher temperatures.

[C].

only in Newtonion fluids.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: The capillary rise of mercury is maximum in glass tube of dia __________ mm.
[A].

0.5

[B].

1

[C].

2

[D].

5

Answer: Option A

Explanation:

No answer description available for this question.