Fluid Mechanics MCQ Questions & Answers

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Each section contains 100 MCQs on Fluid Mechanics .

The actual velocity at vena-contracta for flow through an orifice from a reservoir is given by

A) $${{\text{C}}_{\text{v}}} \cdot \sqrt {2{\text{gH}}} $$ B) $${{\text{C}}_{\text{c}}} \cdot \sqrt {2{\text{gH}}} $$ C) $${{\text{C}}_{\text{d}}} \cdot \sqrt {2{\text{gH}}} $$ D) $${{\text{C}}_{\text{v}}} \cdot {{\text{V}}_{\text{a}}}$$

Discuss

Answer & Solution

Answer: Option A

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

If 'x' is the depth of flow in an open channel of large width, then the hydraulic radius is equal to

A) x B) $$\frac{{\text{x}}}{2}$$ C) $$\frac{{\text{x}}}{3}$$ D) $$\frac{{2{\text{x}}}}{3}$$

Discuss

Answer & Solution

Answer: Option A

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

In centrifugal pumps, cavitation occurs, when pressure of the impeller eye or vane becomes

A) Less than atmospheric pressure B) More than liquid vapor pressure C) Less than liquid vapor pressure D) More than atmospheric pressure

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Answer & Solution

Answer: Option C

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

A compressor that takes suction at a pressure below atmospheric and discharge against atmospheric pressure is called a __________ pump.

A) Sump B) Volute C) Vacuum D) Submerged

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Answer & Solution

Answer: Option C

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

Check valve is used for __________ flow.

A) Very precise control of B) Unidirectional C) Multidirectional D) None of these

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Answer & Solution

Answer: Option B

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

A rotameter works on the principle of __________ pressure drop.

A) Constant B) Variable C) Both A & B D) Neither A nor B

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Answer & Solution

Answer: Option A

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

The continuity equation of fluid mechanics utilises the principle of conservation of

A) Momentum B) Mass C) Energy D) Both B & C

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Answer & Solution

Answer: Option B

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

Which of the fluid forces are not considered in the Reynold's equation of flow?

A) Viscous forces B) Turbulent forces C) Pressure forces D) Compressibility forces

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Answer & Solution

Answer: Option D

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

A Bingham fluid of viscosity μ = 10 Pa.s and yield stress, τ₀ = 10 KPa, is shared between flat parallel plates separated by a distance of 10^-3 m. The top plate is moving with a velocity of 1 m/s. The shear stress on the plate is

A) 10 KPa B) 20 KPa C) 30 KPa D) 40 KPa

Discuss

Answer & Solution

Answer: Option B

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

Piezometric head is the sum of the __________ heads.

A) Elevation & kinetic energy B) Elevation & pressure C) Kinetic energy & pressure D) None of these

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