Fluid Mechanics MCQ Questions & Answers

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Each section contains 100 MCQs on Fluid Mechanics .

An ideal fluid is

A) Frictionless & incompressible B) One, which obeys Newton's law of viscosity C) Highly viscous D) None of these

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

An ideal nozzle design aims at

A) Minimising wall friction B) Suppressing boundary layer separation C) Both A & B D) Neither A nor B

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

Fluid resistance to shear depends upon its

A) Rate of transfer of molecular momentum B) Cohesion C) Both A and B D) Neither A nor B

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

Gradually varied flow in open channel is a/an __________ flow.

A) Steady uniform B) Steady non-uniform C) Unsteady uniform D) Unsteady non-uniform

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

The ratio of the hydraulic radius to the diameter of the channel, for maximum mean velocity of flow in a circular channel, in open channel flow is

A) 0.3 B) 0.9 C) 0.03 D) 0.66

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

The frictional resistance in laminar flow does not depend on the

A) Area of surface in contact B) Flow velocity C) Fluid temperature D) Pressure of flow

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

A Newtonion liquid (ρ = density, μ = viscosity) is flowing with velocity v in a tube of diameter 'D'. Let Δp be the pressure drop across the length 'L'. For a laminar flow, Δp is proportional to

A) L ρv²/D B) L μ;V/D² C) D ρv²/L D) Μ V/L

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

Most of the centrifugal pumps used in chemical plants are usually __________ driven.

A) Steam B) Diesel engine C) Electric motor D) Gas turbine

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

In case of coutte flow, the fluid flow is between two large flat parallel plates with

A) Top plate moving and the bottom plate fixed B) Bottom plate moving and the top plate fixed C) Both the plates fixed D) Both the plates moving

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

100

Capacity of a rotary gear pump can be varied by

A) Changing the speed of rotation B) Bleeding air into suction C) Bypassing liquid from the suction or discharge line D) All of the above

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

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Fluid Mechanics MCQ Questions & Answers | Chemical Engineering