Fluid Mechanics

Question: Air vessel of a reciprocating pump is initially filled with
[A].

atmospheric air

[B].

compressed air

[C].

water

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Mach number is important in a fluid flow problem, when the inertia and __________ forces predominate.
[A].

elastic

[B].

viscous

[C].

gravity

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: A pressure head of 320 metres of water in meters of CCl4 (sp.gr = 1.6) will be
[A].

100

[B].

200

[C].

320

[D].

160

Answer: Option B

Explanation:

No answer description available for this question.

Question: Discharge in laminar flow through a pipe varies
[A].

as the square of the radius.

[B].

inversely as the pressure drop.

[C].

inversely as the viscosity.

[D].

as the square of the diameter.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Cp/Cv is termed as
[A].

adiabatic constant

[B].

Mach number

[C].

Weber number

[D].

Prandtl number

Answer: Option A

Explanation:

No answer description available for this question.

Question: For flow through an orifice from a reservoir, the actual velocity at the vena con-tracta is given by
[A].

2gh

[B].

C.V. 2gh

[C].

Cd 2gh

[D].

Cc 2gh

Answer: Option B

Explanation:

No answer description available for this question.

Question: In deriving Bernoulli’s equation, fluid is assumed to be
[A].

incompressible, frictionless, steady, along a streamline.

[B].

uniform, steady, incompressible, along a streamline.

[C].

steady, density being pressure dependent, frictionless.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: A hydraulic accumulator comprises of
[A].

a storage device and a control valve.

[B].

a cylinder and a plunger.

[C].

two pistons and two cylinders.

[D].

a storage tank and a ram pump.

Answer: Option B

Explanation:

No answer description available for this question.

Question: If ‘x’ is the depth of flow in an open channel of large width, then the hydraulic radius is equal to
[A].

x

[B].

x/2

[C].

x/3

[D].

2x/3

Answer: Option A

Explanation:

No answer description available for this question.

Question: Choking in case of pipe flow means that a
[A].

specified mass flow rate can not be achieved.

[B].

valve is closed in the line.

[C].

restriction in flow cross-section area occurs.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.