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 6 of 77

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Q51.
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
Q52.
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.
Q53.
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
Q54.
Foot valves provided in pumps are __________ valves.

a.

relief

b.

three/four way

c.

pressure reducing

d.

directional control

Discuss
Answer: (d).directional control
Q55.
With increasing flow rate, the hydraulic efficiency of a centrifugal pump

a.

monotonically decreases.

b.

decreases and then increases.

c.

remains constant.

d.

increases and then decreases.

Discuss
Answer: (a).monotonically decreases.
Q56.
The velocity profile for turbulent flow through a closed conduit is

a.

logarithmic

b.

parabolic

c.

hyperbolic

d.

linear

Discuss
Answer: (a).logarithmic
Q57.
In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said to have the same hydraulic roughness, when they have equal values of

a.

relative roughness.

b.

absolute roughness.

c.

friction co-efficient for flows at equal Reynold number.

d.

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

Discuss
Answer: (c).friction co-efficient for flows at equal Reynold number.
Q58.
Water hammer in a pipeline results from the

a.

bursting of pipelines due to closure by a valve.

b.

rapid pressure change due to a rapid change in the rate of flow.

c.

pressure increase due to closure of a valve resulting in decrease in rate of flow.

d.

none of these.

Discuss
Answer: (b).rapid pressure change due to a rapid change in the rate of flow.
Q59.
Molten soap mass is transported by a __________ pump.

a.

diaphragm

b.

reciprocating

c.

gear

d.

centrifugal

Discuss
Answer: (d).centrifugal
Q60.
At high Reynolds number

a.

inertial forces control and viscous forces are unimportant.

b.

viscous forces predominate.

c.

inertial forces are unimportant and viscous forces control.

d.

none of these.

Discuss
Answer: (a).inertial forces control and viscous forces are unimportant.
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