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 28 of 77

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Q271.
In the low Reynolds number region, the drag force on a sphere is proportional to

a.

V

b.

V²

c.

V⁴

d.

V^0.5

Discuss
Answer: (a).V
Q272.
The peripherial velocity at inlet of a centrifugal pump having inlet diameter of 25 cms and rotating at 950 rpm is __________ m/sec.

a.

1.8

b.

12.4

c.

186.2

d.

736.4

Discuss
Answer: (b).12.4
Q273.
Laminar flow is characterised by the nonexistence of

a.

pressure fluctuation.

b.

eddies.

c.

deviating velocities.

d.

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

Discuss
Answer: (d).all (a), (b) & (c).
Q274.
The length of the tube necessary for the boundary layer to reach the centre of the tube and for fully developed flow to be established is called the __________ length.

a.

equivalent

b.

transition

c.

Prandtl mixing

d.

none of these

Discuss
Answer: (b).transition
Q275.
Select the correct practical example of steady non-uniform flow.

a.

Motion of water around a ship in a lake.

b.

Motion of river around bridge piers.

c.

Steadily decreasing flow through a reducing section.

d.

Steadily increasing flow through a pipe.

Discuss
Answer: (c).Steadily decreasing flow through a reducing section.
Q276.
Hydraulic diameter for non-circular ducts is equal to __________ times the area of flow divided by the perimeter.

a.

two

b.

three

c.

four

d.

eight

Discuss
Answer: (c).four
Q277.
Boundary layer thickness in laminar flow over a flat plate increases as (where, d = distance from the leading edge.)

a.

√d

b.

d^1/3

c.

d²

d.

d^2/3

Discuss
Answer: (a).√d
Q278.
Gradually varied flow in open channel is a/an __________ flow.

a.

steady uniform

b.

steady non-uniform

c.

unsteady uniform

d.

unsteady non-uniform

Discuss
Answer: (b).steady non-uniform
Q279.
The line of action of the buoyant force acts through the

a.

centroid of the displaced volume of fluid.

b.

centre of gravity of a submerged body.

c.

centroid of the volume of any floating body.

d.

none of these.

Discuss
Answer: (a).centroid of the displaced volume of fluid.
Q280.
Cavitation in a centrifugal pump can be avoided by keeping the

a.

inlet pressure high

b.

outlet pressure low

c.

inlet pressure low

d.

outlet pressure high

Discuss
Answer: (a).inlet pressure high
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