Fluid Mechanics

Question: In case of turbulent flow of a Newtonion fluid in a straight pipe, the maximum velocity is equal to (where, Vavg = average fluid velocity)
[A].

Vavg

[B].

1.2 Vavg

[C].

1.5 Vavg

[D].

1.8 Vavg

Answer: Option B

Explanation:

No answer description available for this question.

Question: Brownian movement is prominent in the particle size range of __________ microns in case of settling of a particle in a fluid.
[A].

2 to 3

[B].

0.01 to 0.10

[C].

200 to 300

[D].

100 to 1000

Answer: Option A

Explanation:

No answer description available for this question.

Question: __________ flow means the flow of incompressible fluid with no shear.
[A].

Potential

[B].

Streamline

[C].

Creep

[D].

Boundary layer

Answer: Option A

Explanation:

No answer description available for this question.

Question: Fanning friction factor is equal to(where, fB = Blassius friction factor).
[A].

fB/4

[B].

fB/2

[C].

4fB

[D].

2fB

Answer: Option A

Explanation:

No answer description available for this question.

Question: For flow of fluids through packed bed, the superficial velocity is
[A].

less than the average velocity through channels.

[B].

more than the average velocity through channels.

[C].

dependent on the pressure drop across the bed.

[D].

same as the average velocity through channels.

Answer: Option A

Explanation:

No answer description available for this question.

Question: In fluid flow, the stagnation point is defined as a point, where the __________ is zero.
[A].

flow velocity

[B].

pressure

[C].

total energy

[D].

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

Answer: Option A

Explanation:

No answer description available for this question.

Question: Each term of the Bernoulli’s equation written in the form, , represents the total energy per unit
[A].

mass

[B].

volume

[C].

specific weight

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: In case of a centrifugal pump, the theoretical head developed is dependent on the __________ the impeller.
[A].

speed of

[B].

diameter of

[C].

fluid velocity leaving

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: At high Reynolds number
[A].

inertial forces control and viscous forces are unimportant.

[B].

viscous forces predominate.

[C].

inertial forces are unimportant and viscous forces control.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Check valve provided in the discharge line of a centrifugal pump serves the purpose of controlling the
[A].

back flow of fluid in the event of stoppage of pump.

[B].

discharge pressure.

[C].

flow of liquid during operation of the pump.

[D].

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

Answer: Option A

Explanation:

No answer description available for this question.