Fluid Mechanics

Question: Momentum correction factor used in fluid flow problems accounts for the
[A].

change in direction of flow.

[B].

change in total energy.

[C].

change in pressure.

[D].

non uniform direction of velocities at inlet & outlet sections.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Choose the correct set of dimensions of viscosity that are equivalent (where, F, M, L, T are dimensions for force, mass, length and time respectively).
[A].

FL-2T, ML-1T-1

[B].

FLT, ML-1T-1

[C].

ML-1T-3, F-1L2T

[D].

F-1L2T-1, MLT-3

Answer: Option A

Explanation:

No answer description available for this question.

Question: The bulk modulus of elasticity of a liquid
[A].

is zero for incompressible liquid.

[B].

decreases with pressure.

[C].

is independent of temperature & pressure.

[D].

increases with pressure.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Correction for capillary effect in manometers (used for pressure measurement) need not be applied, if diameter of the manometer tube is __________ mm.
[A].

< 4

[B].

> 4

[C].

> 12.5

[D].

< 10

Answer: Option C

Explanation:

No answer description available for this question.

Question: For an incompressible fluid, the bulk modulus of elasticity is
[A].

5 kg/m3

[B].

∞ N/m2

[C].

1 N

[D].

0 N/m

Answer: Option B

Explanation:

No answer description available for this question.

Question: In a stabilised soap bubble, pressure inside it compared to external pressure is
[A].

more

[B].

less

[C].

same

[D].

unpredictable

Answer: Option A

Explanation:

No answer description available for this question.

Question: With increase in molecular weight of the gas, the head developed by a centrifugal compressor will
[A].

decrease

[B].

increase

[C].

remain same

[D].

unpredictable

Answer: Option A

Explanation:

No answer description available for this question.

Question: Centrifugal compressors compared to reciprocating compressors
[A].

require less space.

[B].

have quieter operation.

[C].

have lower operating costs.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: Discharge from a 24 inch pipe of water at 10 ft/sec will be __________ ft3/sec.
[A].

7.65

[B].

32.36

[C].

48.22

[D].

125.6

Answer: Option D

Explanation:

No answer description available for this question.

Question: If the discharge of a centrifugal pump is throttled, then its suction lift
[A].

increases

[B].

decreases

[C].

remains unchanged

[D].

data insufficient to predict

Answer: Option A

Explanation:

No answer description available for this question.