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 1 of 77

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Q1.
A particle A of diameter 10 microns settles in an oil of specific gravity 0.9 and viscosity 10 poise under Stoke's law. A particle B with diameter 20 microns settling in the same oil will have a settling velocity

a.

same as that of A.

b.

one fourth as that of A.

c.

twice as that of A.

d.

four times as that of A.

Discuss
Answer: (b).one fourth as that of A.
Q2.
The pitot static tube does not measure the __________ pressure.

a.

static

b.

total

c.

difference in static & dynamic

d.

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

Discuss
Answer: (d).all (a), (b) and (c)
Q3.
The fluid in which the shearing stress within it is proportional to the velocity gradient across the sheared section, is called a __________ fluid.

a.

Bingham

b.

Newtonion

c.

perfect

d.

none of these

Discuss
Answer: (b).Newtonion
Q4.
In fluid flow, cavitation is caused, if the

a.

fluid velocity decreases to zero.

b.

total energy decreases.

c.

both (a) and (b).

d.

flow pressure approaches its vapor pressure at the prevailing temperature.

Discuss
Answer: (d).flow pressure approaches its vapor pressure at the prevailing temperature.
Q5.
The ratio of the depth of flow to the hydraulic radius for the most economical trapezoidal section, in open channel flow is

a.

0.5

b.

1

c.

1.5

d.

2

Discuss
Answer: (d).2
Q6.
Which of the following denotes the effect of compressibility in fluid flow ?

a.

Weber number

b.

Mach number

c.

Euler number

d.

Reynolds number

Discuss
Answer: (b).Mach number
Q7.
Nominal size of the discharge pipe of a pump is usually __________ the nominal size of the inlet pipe.

a.

smaller than

b.

larger than

c.

same as

d.

twice

Discuss
Answer: (a).smaller than
Q8.
The terminal velocity of a small sphere settling in a viscous fluid varies as the

a.

first power of its dimeter.

b.

inverse of the fluid viscosity.

c.

inverse square of the diameter.

d.

square of the difference in specific weights of solid & fluid.

Discuss
Answer: (b).inverse of the fluid viscosity.
Q9.
If the discharge of a centrifugal pump is throttled, then its suction lift

a.

increases

b.

decreases

c.

remains unchanged

d.

data insufficient to predict

Discuss
Answer: (a).increases
Q10.
Foot valves provided in pumps are __________ valves.

a.

relief

b.

three/four way

c.

pressure reducing

d.

directional control

Discuss
Answer: (d).directional control
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