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 66 of 77

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Q651.
The boundary layer is that part of a moving fluid, in which the fluid velocity is

a.

affected by the fluid flow pressure.

b.

constant.

c.

affected by the presence of a solid boundary.

d.

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

Discuss
Answer: (c).affected by the presence of a solid boundary.
Q652.
The ratio of the depth of flow to the diameter of the channel for maximum discharge in a circular channel in open channel flow is

a.

0.1

b.

0.55

c.

0.95

d.

1.85

Discuss
Answer: (c).0.95
Q653.
A relief valve

a.

provides back pressure for a cylinder.

b.

unloads a pump.

c.

is a directional control valve.

d.

none of these.

Discuss
Answer: (c).is a directional control valve.
Q654.
An isentropic process is the one, in which

a.

pv = constant

b.

pvʳ = constant

c.

pvʳ = constant, and process is reversible

d.

none of these

Discuss
Answer: (c).pvʳ = constant, and process is reversible
Q655.
The distribution of shear stress in a stream of fluid in a circular tube is

a.

linear with radius for turbulent flow only.

b.

linear with radius for laminar flow only.

c.

linear with radius for both laminar & turbulent flow.

d.

parabolic with radius for both laminar & turbulent flow.

Discuss
Answer: (c).linear with radius for both laminar & turbulent flow.
Q656.
A fluid is the one, which

a.

cannot remain at rest under the action of shear force.

b.

continuously expands till it fills any container.

c.

is incompressible.

d.

permanently resists distortion.

Discuss
Answer: (a).cannot remain at rest under the action of shear force.
Q657.
One horsepower is equal to

a.

550 lbf.ft/second

b.

550 kgf.m/second

c.

both (a) and (b)

d.

550 lbf.ft./hr

Discuss
Answer: (a).550 lbf.ft/second
Q658.
A fluid (μ/ρ = 0.01 cm²/sec) is moving at critical flow condition (Nʀₑ = 2100) through a pipe of dia 3 cms. Velocity of flow is __________ cm/sec.

a.

7

b.

700

c.

7000

d.

630

Discuss
Answer: (a).7
Q659.
Capillary rise of mercury in a small diameter tube is proportional to (where, d = diameter of the tube, σ = surface tension of mercury)

a.

d

b.

1/d

c.

σ

d.

l/σ

Discuss
Answer: (c).σ
Q660.
The pressure drop per unit length of pipe incurred by a fluid 'X' flowing through pipe is Δp. If another fluid 'Y' having both the specific gravity & density just double of that of fluid 'X', flows through the same pipe at the same flow rate/average velocity, then the pressure drop in this case will be

a.

Δp

b.

2Δp

c.

Δp²

d.

Δp/2

Discuss
Answer: (b).2Δp
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