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 21 of 77

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Q201.
Which of the following pipe bends will incur the largest head loss ?

a.

U-bend

b.

30° bend

c.

45° bend

d.

90° bend

Discuss
Answer: (a).U-bend
Q202.
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: (c).Rotameter
Q203.
When the water is warm, the height to which it can be lifted by a pump

a.

decreases due to reduced viscosity.

b.

decreases due to reduced vapour pressure.

c.

increases due to increased vapour pressure

d.

decreases due to increased frictional resistance.

Discuss
Answer: (b).decreases due to reduced vapour pressure.
Q204.
Pipes having diameter 14 inches or more are designated by their

a.

outside diameter

b.

inside diameter

c.

schedule number

d.

none of these

Discuss
Answer: (a).outside diameter
Q205.
Viscosity of water at 40°C lies in the range of

a.

1 x 10⁻³ to 2 x 10⁻³ kg/m.s

b.

0.5 x 10⁻³ to 1 x 10⁻³ kg/m.s

c.

1 to 2 kg/m.s

d.

0.5 to 1 kg/m.s

Discuss
Answer: (b).0.5 x 10⁻³ to 1 x 10⁻³ kg/m.s
Q206.
Self-priming centrifugal pump can be used for

a.

booster service.

b.

pumping liquid fertilisers (e.g. liquid NH₃).

c.

pumping industrial wastes.

d.

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

Discuss
Answer: (d).all (a), (b) and (c).
Q207.
Water hammer is caused, when water flowing in a pipe is suddenly brought to rest by closing the valve. The extent of pressure thus produced due to water hammer depends on the

a.

pipe length

b.

fluid velocity in the pipe

c.

time taken to close the valve

d.

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

Discuss
Answer: (d).all (a), (b) and (c)
Q208.
Bernoull's equation does not apply to the functioning of a/an

a.

venturimeter

b.

orificem

c.

pitot tube

d.

none of these

Discuss
Answer: (d).none of these
Q209.
What is the shear rate at the pipe wall, in case of laminar flow of Newtonion fluids in a pipe of diameter 'D' & length 'L' incurring a pressure drop 'Δp' with average velocity 'Vₐᵥ'?

a.

D Δp/8L

b.

D Δp/4L

c.

8 . Vₐᵥ/D

d.

4 . Vₐᵥ/D

Discuss
Answer: (c).8 . Vₐᵥ/D
Q210.
Pascal's law is valid, only when the fluid is

a.

frictionless and at rest.

b.

at rest.

c.

at rest and when the frictionless fluid is in motion.

d.

none of these.

Discuss
Answer: (b).at rest.
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