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 12 of 77

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Q111.
Pick out the wrong statement.

a.

The shear stress at the pipe (dia = D, length = L) wall in case of laminar flow of Newtonion fluids is D/4L .∆p.

b.

In the equation τ.gc = k. (du/dy)ⁿ , the value of 'n' for pseudoplastic and dilatant fluids are < 1 and >1 respectively.

c.

Shear stress for Newtonion fluid is proportional to the rate of shear in the direction perpendicular to motion.

d.

With increase in the Mach number >0.6, the drag co-efficient decreases in case of compressible fluids.

Discuss
Answer: (d).With increase in the Mach number >0.6, the drag co-efficient decreases in case of compressible fluids.
Q112.
The friction factor for turbulent flow in a hydraulically smooth pipe

a.

depends only on Reynolds number.

b.

does not depend on Reynolds number.

c.

depends on the roughness.

d.

none of these.

Discuss
Answer: (a).depends only on Reynolds number.
Q113.
The pressure at a point in a fluid is not the same in all directions, when the fluid is viscous and

a.

moving

b.

static

c.

cold

d.

hot

Discuss
Answer: (a).moving
Q114.
What causes convective acceleration in fluid flow ?

a.

Steep slope in flow

b.

Unsteady nature of flow

c.

Non-uniformity of flow

d.

Turbulence in flow

Discuss
Answer: (c).Non-uniformity of flow
Q115.
The Stoke's stream function applies to the

a.

irrotational flow only.

b.

ideal/non-viscous fluids only.

c.

cases of axial symmetry.

d.

none of these.

Discuss
Answer: (c).cases of axial symmetry.
Q116.
Slugging in a fluidised bed can be avoided by using

a.

tall narrow vessel.

b.

deep bed of solids.

c.

shallow beds of solids and proper choice of particle size.

d.

very large particles.

Discuss
Answer: (c).shallow beds of solids and proper choice of particle size.
Q117.
The ratio of width to depth for the most economical rectangular section in open channel flow is

a.

0.5

b.

1

c.

1.5

d.

2

Discuss
Answer: (d).2
Q118.
The simple pitot tube measures the __________ pressure.

a.

static

b.

dynamic

c.

total

d.

none of these

Discuss
Answer: (c).total
Q119.
Two dimensional stream function

a.

relates velocity and pressure.

b.

is constant along a stream line.

c.

is constant along an equipotential surface.

d.

none of these.

Discuss
Answer: (b).is constant along a stream line.
Q120.
What causes cavitation in centrifugal pump ?

a.

High suction pressure

b.

Low barometric pressure

c.

Low suction pressure

d.

High suction velocity

Discuss
Answer: (c).Low suction pressure
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