Fluid Mechanics

Question: For the same terminal conditions and valve size, the pressure drop in a fully opened globe valve as compared to that in a gate valve is
[A].

more

[B].

less

[C].

equal

[D].

either (a) or (b); depends on the viscosity of the fluid

Answer: Option A

Explanation:

No answer description available for this question.

Question: Draining of shallow pits or sump is done by a sump pump, which is a __________ pump.
[A].

single stage vertical

[B].

centrifugal

[C].

plunger

[D].

diffuser

Answer: Option A

Explanation:

No answer description available for this question.

Question: Working of a __________ pump characterises mixed flow.
[A].

turbine

[B].

piston

[C].

diaphragm

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: __________ pumps are axial flow pumps.
[A].

Turbine

[B].

Propeller

[C].

Diffuser

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Medium viscosity lubricating oil can be most ideally pumped by a __________ pump.
[A].

vane

[B].

piston

[C].

centrifugal

[D].

plunger

Answer: Option A

Explanation:

No answer description available for this question.

Question: Major loss in sudden contraction in pipe flow is due to
[A].

boundary friction.

[B].

flow contraction.

[C].

expansion of flow after sudden contraction.

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: If the head over the triangular notch is doubled, the discharge will increase by __________ times.
[A].

2

[B].

2.828

[C].

5.657

[D].

4

Answer: Option C

Explanation:

No answer description available for this question.

Question: Cd for the orifice plate varies from
[A].

0.58 to 0.8

[B].

0.93 to 0.98

[C].

0.2 to 0.3

[D].

0.02 to 0.03

Answer: Option A

Explanation:

No answer description available for this question.

Question: For a given Reynold number as d/D for an orifice increases, Cd will (where, d & D are orifice & pipe diameters respectively).
[A].

increase

[B].

decrease

[C].

remain constant

[D].

either (a) or (b); depends on other factors

Answer: Option A

Explanation:

No answer description available for this question.

Question: Forces acting on a particle settling in fluid are __________ forces.
[A].

gravitational & buoyant.

[B].

centrifugal & drag.

[C].

gravitational or centrifugal buoyant drag.

[D].

external, drag & viscous.

Answer: Option C

Explanation:

No answer description available for this question.