Fluid Mechanics MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Fluid Mechanics, a fundamental topic in the field of Basic Chemical Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Fluid Mechanics MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Fluid Mechanics mcq questions that explore various aspects of Fluid Mechanics problems. Each MCQ is crafted to challenge your understanding of Fluid Mechanics principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Basic Chemical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Fluid Mechanics MCQs are your pathway to success in mastering this essential Basic Chemical Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Fluid Mechanics. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Fluid Mechanics knowledge to the test? Let's get started with our carefully curated MCQs!

Fluid Mechanics MCQs | Page 73 of 77

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Q721.
Umf is the minimum fluidisation velocity for a bed of particles. An increase in the superficial gas velocity from 2 Umf to 2.5 Umf results in (all velocities are smaller than the entrainment velocity of the particles) no change in the

a.

drag on particles

b.

drag on coloumn walls

c.

bed height

d.

bed voidage

Discuss
Answer: (c).bed height
Q722.
Slugging occurs in a fluidised bed, if the bed is

a.

narrow

b.

deep

c.

both (a) & (b)

d.

neither (a) nor (b)

Discuss
Answer: (c).both (a) & (b)
Q723.
The Mach number for hypersonic flow of compressible fluid is

a.

1

b.

> 1

c.

> 4

d.

< 2

Discuss
Answer: (c).> 4
Q724.
Boundary layer thickness in turbulent flow over a flat plate increases as(where, d = distance from the leading edge.)

a.

√d

b.

d^2/3

c.

d^4/5

d.

d^1/3

Discuss
Answer: (c).d^4/5
Q725.
Mass velocity in case of steady flow and through a constant cross-section conduit is independent of the

a.

temperature

b.

pressure

c.

both (a) & (b)

d.

neither (a) nor (b)

Discuss
Answer: (c).both (a) & (b)
Q726.
The valve used for very remote and accurate control of fluid is a __________ valve.

a.

needle

b.

globe

c.

gate

d.

butterfly

Discuss
Answer: (a).needle
Q727.
f = 16/Nʀₑ, is valid for

a.

turbulent flow

b.

laminar flow through an open channel

c.

steady flow

d.

none of these

Discuss
Answer: (d).none of these
Q728.
A rotameter works on the principle of __________ pressure drop.

a.

constant

b.

variable

c.

both (a) & (b)

d.

neither (a) nor (b)

Discuss
Answer: (a).constant
Q729.
The effect of solid boundary on the fluid flow is confined to the boundary layer, except for fluids

a.

having high viscosities.

b.

moving at low velocities.

c.

both (a) & (b).

d.

neither (a) nor (b).

Discuss
Answer: (c).both (a) & (b).
Q730.
The excess of the sum of pressure & velocity heads over the vapor pressure of the liquid at the suction is called the

a.

static submergence.

b.

net positive suction head (NPSH).

c.

cavitation sensitivity.

d.

priming.

Discuss
Answer: (b).net positive suction head (NPSH).
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