Fluid Mechanics MCQ Questions & Answers

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Each section contains 100 MCQs on Fluid Mechanics .

The curve of metacentre for a floating body __________ the curve of buoyancy.

A) Is always below B) Is the evolute of C) Intersects at right angle D) Is tangential to

Discuss

Answer & Solution

Answer: Option B

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

At a constant speed of the centrifugal pump . it __________ the impeller diameter.

A) Capacity varies directly with B) Head varies as the square of C) Horsepower varies as the cube of D) All of the above

Discuss

Answer & Solution

Answer: Option D

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

Navier-Stokes equation is useful in the analysis of __________ fluid flow problems.

A) Non-viscous B) Viscous C) Turbulent D) Rotational

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Answer & Solution

Answer: Option B

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

In the Newton's law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass is __________ the fluid viscosity.

A) Directly proportional to B) Inversely proportional to C) Inversely proportional to the square root of D) Independent of

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Answer & Solution

Answer: Option B

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

For a given Reynolds number, in a hydraulically smooth pipe, further smoothening __________ the friction factor.

A) Brings about no further reduction of B) Increases C) Decreases D) None of these

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Answer & Solution

Answer: Option A

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

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

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Answer & Solution

Answer: Option A

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

In case of isentropic flow, the speed of sound in an ideal gas is proportional to (where M = molecular weight of the gas)

A) $$\frac{1}{{\sqrt {\text{M}} }}$$ B) $$\sqrt {\text{M}} $$ C) $$\frac{1}{{\text{M}}}$$ D) M

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Answer & Solution

Answer: Option A

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

Fanning friction factor is equal to (where, f_B = Blassius friction factor).

A) $$\frac{{{{\text{f}}_{\text{B}}}}}{4}$$ B) $$\frac{{{{\text{f}}_{\text{B}}}}}{2}$$ C) 4f_B D) 2f_B

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Answer & Solution

Answer: Option A

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

For the free settling of a spherical particle through a fluid, the slope of, C_D-log N_Re , plot is

A) 1 B) -1 C) 0.5 D) -0.5

Discuss

Answer & Solution

Answer: Option B

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

Various efficiencies of a centrifugal pump are related as (where, η_m = mechanical efficiency η_v = volumetric efficiency. η_ma = manometric efficiency η_o = overall efficiency)

A) η_ma × η_m × η_v = η_o B) η_m = η_v × η_ma C) η_ma = η_m × η_v D) η_v = η_m × η_ma

Discuss

Answer & Solution

Answer: Option B

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

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Fluid Mechanics MCQ Questions & Answers | Chemical Engineering