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 20 of 77

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Q191.
As the velocity V and thus the Reynolds number of a flow past a sphere increases from very low value, the drag force for Re << 1

a.

increases linearly with V.

b.

decreases linearly with V.

c.

decreases as V².

d.

none of these.

Discuss
Answer: (a).increases linearly with V.
Q192.
The pressure head of a flow meter remains constant for

a.

venturimeter

b.

orificemeter

c.

rotameter

d.

pitot tube

Discuss
Answer: (c).rotameter
Q193.
A venturimeter can not be used for the direct measurement of

a.

datum difference in the stretch of pipeflow

b.

pressure difference in the flow throughpipeline.

c.

friction loss in pipe flow.

d.

all (a), (b) and (c).

Discuss
Answer: (d).all (a), (b) and (c).
Q194.
A double acting reciprocating pump compared to a single acting pump (of almost same size working under same pressure levels) would give almost double

a.

head

b.

discharge

c.

efficiency

d.

none of these

Discuss
Answer: (b).discharge
Q195.
Which of the following is used for very accurate measurement of flow of gas at low velocity ?

a.

Pitot tube

b.

Rotameter

c.

Segmental orificemeter

d.

Hot wire annemometer

Discuss
Answer: (d).Hot wire annemometer
Q196.
A centrifugal pump has the following specifications:

Power = 4 H.P.
Speed = 800 rpm
Head = 8 metres
Flow = 1000 litres/minutes.

If its speed is halved, the new discharge will be __________ litres/minute.

a.

500

b.

200

c.

1000

d.

750

Discuss
Answer: (a).500
Q197.
The dimension of kinematic viscosity is

a.

ML⁻²T⁻¹

b.

L²T⁻¹

c.

ML⁻²T⁻²

d.

none of these

Discuss
Answer: (b).L²T⁻¹
Q198.
A pipe of I.D. 4 m is bifurcated into two pipes of I.D. 2 m each. If the average velocity of water flowing through the main pipe is 5 m/sec, the average velocity through the bifurcated pipes is

a.

20 m/sec

b.

10 m/sec

c.

5√2 m/sec

d.

5 m/sec

Discuss
Answer: (b).10 m/sec
Q199.
Turbulent flow generally occurs for cases involving

a.

highly viscous fluid

b.

very narrow passages

c.

very slow motion

d.

none of these

Discuss
Answer: (d).none of these
Q200.
Lower BWG means __________ of the tube.

a.

lower thickness

b.

lower cross-section

c.

outer diameter

d.

inner diameter

Discuss
Answer: (b).lower cross-section
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