Fluid Mechanics

Question: Glass pipes can be joined by
[A].

flanges

[B].

welding

[C].

soldering

[D].

bell and spigot joint

Answer: Option D

Explanation:

No answer description available for this question.

Question: Check valves are used
[A].

at high pressure.

[B].

in bends.

[C].

for controlling water flow.

[D].

for unidirectional flow.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Most commonly used joint in the underground pipe lines is the
[A].

sleevejoint

[B].

coupling

[C].

flange

[D].

expansion joint

Answer: Option A

Explanation:

No answer description available for this question.

Question: A pitched-blade turbine draws __________ a straight blade turbine.
[A].

less power than

[B].

more power than

[C].

same power as

[D].

data insufficient to predict

Answer: Option A

Explanation:

No answer description available for this question.

Question: Froude number is not a factor
[A].

for Reynolds number greater than 300.

[B].

when there is no vortex formation.

[C].

for unbaffled tank.

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Froude number is the ratio of
[A].

shear stress to gravitational stress.

[B].

drag stress to shear stress.

[C].

inertial stress to shear stress.

[D].

inertial stress to gravitational stress.

Answer: Option D

Explanation:

No answer description available for this question.

Question: With increase in the temperature, viscosity of a liquid
[A].

increases

[B].

decreases

[C].

remains constant

[D].

may increase or decrease; depends on the liquid

Answer: Option B

Explanation:

No answer description available for this question.

Question: Baffles in mixing tanks are provided to
[A].

reduce swirling and vortex formation.

[B].

increase the structural strength of the tank.

[C].

aid in rotational flow.

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: Dimension of kinematic viscosity is
[A].

MLT-1

[B].

L2 . T-1

[C].

L2T

[D].

L2 . T-2

Answer: Option B

Explanation:

No answer description available for this question.

Question: A centrifugal pump is used to pump water through a horizontal distance of 150 m, and then raised to an overhead tank 10 m above. The pipe is smooth with an I.D of 50 mm. What head (m of water) must the pump generate at its exit (E) to deliver water at a flow rate of 0.001 m3/s? The Fanning friction factor, f is 0.0062.
[A].

10 m

[B].

11 m

[C].

12 m

[D].

20 m

Answer: Option B

Explanation:

No answer description available for this question.