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 10 of 77

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Q91.
A Bingham fluid of viscosity μ = 10 Pa.s and yield stress, τ₀ = 10 KPa, is shared between flat parallel plates separated by a distance of 10⁻³ m. The top plate is moving with a velocity of 1 m/s. The shear stress on the plate is

a.

10 KPa

b.

20 KPa

c.

30 KPa

d.

40 KPa

Discuss
Answer: (b).20 KPa
Q92.
Pick out the correct statement.

a.

A forced vortex occurs when fluid rotates as a solid about an axis.

b.

In laminar flow, Newton's law of viscosity does not apply.

c.

A free vortex occurs, when fluidrotates as a solid.

d.

In turbulent flow, there are neither cross-currents nor eddies.

Discuss
Answer: (a).A forced vortex occurs when fluid rotates as a solid about an axis.
Q93.
Shear stress in a fluid flowing in a round pipe

a.

varies parabolically across the cross-section.

b.

remains constant over the cross-section.

c.

is zero at the centre and varies linearly with the radius.

d.

is zero at the wall and increases linearly to the centre.

Discuss
Answer: (c).is zero at the centre and varies linearly with the radius.
Q94.
The resistance wire used in a hot wire anemometer for conducting electrical current is made of

a.

copper

b.

tungsten

c.

chromium

d.

aluminium

Discuss
Answer: (b).tungsten
Q95.
The ratio of the hydraulic radius to the diameter of the channel, for maximum mean velocity of flow in a circular channel, in open channel flow is

a.

0.3

b.

0.9

c.

0.03

d.

0.66

Discuss
Answer: (a).0.3
Q96.
For the free settling of a spherical particle through a fluid, the slope of, Cᴅ-log Nʀₑ , plot is

a.

1

b.

-1

c.

0.5

d.

-0.5

Discuss
Answer: (b).-1
Q97.
A centrifugal pump loses prime after starting. The reason of this trouble may be

a.

incomplete priming.

b.

too high a suction lift.

c.

low available NPSH and air leaks in the suction pipe.

d.

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

Discuss
Answer: (d).all (a), (b), and (c).
Q98.
Venturimeter and orificemeter measures the __________ of the fluid.

a.

pressure

b.

maximum velocity

c.

average velocity

d.

point velocity

Discuss
Answer: (c).average velocity
Q99.
Surge tanks are provided in high pressure water pipelines to

a.

store a definte quantity ofwater all the time,

b.

reduce the water hammer.

c.

facilitate easy dismantling of pipeline for cleaning and maintenance.

d.

none of these.

Discuss
Answer: (b).reduce the water hammer.
Q100.
Capacity of a hydraulic accumulator is defined in terms of maximum

a.

amount of energy stored.

b.

flow rate through accumulator.

c.

rate of falling of ram.

d.

volume available in the cylinder.

Discuss
Answer: (a).amount of energy stored.
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