Fluid Mechanics MCQ Questions & Answers

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Each section contains 100 MCQs on Fluid Mechanics .

Boundary layer separation is caused by the

A) Reduction of pressure below vapour pressure B) Reduction of pressure gradient to zero C) Adverse pressure gradient D) Reduction of boundary layer thickness to zero

Discuss

Answer & Solution

Answer: Option C

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

In case of centrifugal fan or blower, the gas capacity varies as

A) Speed B) (speed)² C) (speed)³ D) (speed)^0.5

Discuss

Answer & Solution

Answer: Option A

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

With increase in the temperature, viscosity of a liquid

A) Increases B) Decreases C) Remains constant D) May increase or decrease; depends on the liquid

Discuss

Answer & Solution

Answer: Option B

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

A fluid whose apparent viscosity increases with shear rate is termed as the __________ fluid.

A) Newtonion B) Viscous C) Dilatant D) Non-viscous

Discuss

Answer & Solution

Answer: Option C

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

Which is the most efficient and best for measuring very small flow rate of gases?

A) Venturimeter B) Orifice meter C) Rotameter D) Flow nozzle

Discuss

Answer & Solution

Answer: Option C

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

The pressure and power requirement of a gas fan at constant speed & capacity varies __________ the gas density.

A) Directly as B) Inversely as square root of C) Inversely as D) As square of

Discuss

Answer & Solution

Answer: Option A

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

For a fluid rotating at constant angular velocity about vertical axis as a rigid body, the pressure intensity varies as the

A) Square of the radial distance B) Radial distance linearly C) Inverse of the radial distance D) Elevation along vertical direction

Discuss

Answer & Solution

Answer: Option A

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

To handle smaller quantity of fluid at higher discharge pressure, use a __________ pump.

A) Reciprocating B) Centrifugal C) Volute D) Rotary vacuum

Discuss

Answer & Solution

Answer: Option A

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

What is the ratio of fluid carrying capacity of two pipes having diameters d₁ and d₂ respectively?

A) $${\left( {\frac{{{{\text{d}}_1}}}{{{{\text{d}}_2}}}} \right)^{0.8}}$$ B) $${\left( {\frac{{{{\text{d}}_1}}}{{{{\text{d}}_2}}}} \right)^{0.5}}$$ C) $$\frac{{{{\text{d}}_1}}}{{{{\text{d}}_2}}}$$ D) $${\left( {\frac{{{{\text{d}}_1}}}{{{{\text{d}}_2}}}} \right)^2}$$

Discuss

Answer & Solution

Answer: Option B

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

What is the pipe called which lifts water from a reservoir to a greater height than the initial level in the supply reservoir?

A) Penstock B) Siphon C) Tunnel D) Pressure pipeline

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