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 17 of 77

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Q161.
For ideally incompressible fluid, the Mach number will be

a.

1.5

b.

1

c.

0

d.

5

Discuss
Answer: (b).1
Q162.
In case of isentropic flow, the speed of sound in an ideal gas is proportional to (where M = molecular weight of the gas)

a.

1/√M

b.

√M

c.

1/M

d.

M

Discuss
Answer: (a).1/√M
Q163.
Boundary layer separation is caused by the

a.

reduction of pressure to vapour pressure.

b.

boundary layer thickness reducing to zero.

c.

adverse pressure gradient.

d.

reduction of pressure gradient to zero.

Discuss
Answer: (c).adverse pressure gradient.
Q164.
With increase in temperature, the vapor pressure of liquids

a.

increases

b.

increases linearly

c.

decreases

d.

remains constant

Discuss
Answer: (a).increases
Q165.
A mercury (specific gravity = 13.6) manometer connected across an orificemeter fitted in a pipe shows a manometer reading of 2 cms. If the manometer liquid is changed to carbon tetrachloride (specific gravity = 1.6), then for the same flow rate of water the new manometer reading will be __________ cms.

a.

17

b.

42

c.

84

d.

1.8

Discuss
Answer: (a).17
Q166.
Remote control valve is a __________ valve.

a.

gate

b.

butterfly

c.

needle

d.

globe

Discuss
Answer: (b).butterfly
Q167.
Which of the following quantities are computed by using the hydraulic radius for non-circular ducts ?

a.

Velocity and relative roughness.

b.

Head loss and velocity.

c.

Reynold number, relative roughness and head loss.

d.

Reynolds number and friction factor.

Discuss
Answer: (c).Reynold number, relative roughness and head loss.
Q168.
Centre of pressure in an immersed body is __________ the centre of gravity.

a.

above

b.

below

c.

at

d.

either above or below; depends on the liquid density

Discuss
Answer: (b).below
Q169.
The centre of pressure is

a.

always below the centroid of the area.

b.

always above the centroid of the area.

c.

a point on the line of action of the resultant force.

d.

at the centroid of the submerged area.

Discuss
Answer: (c).a point on the line of action of the resultant force.
Q170.
The uniformity of a gas fluidised bed depends upon the __________ of the solid particles.

a.

size

b.

surface properties

c.

both (a) and (b)

d.

neither (a) nor (b)

Discuss
Answer: (c).both (a) and (b)
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