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 18 of 77

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Q171.
A differential pressure cell is used for

a.

measuring small pressure difference in gases.

b.

measuring small pressure difference in liquids.

c.

remote recording of pressure difference.

d.

measuring the difference of the impact & the static pressure.

Discuss
Answer: (c).remote recording of pressure difference.
Q172.
If more than two branches of pipes are to be connected at the same point, then use a/an

a.

elbow

b.

union

c.

tee

d.

none of these.

Discuss
Answer: (c).tee
Q173.
In case of a centrifugal pump, the ratio of total delivered pressure to pressure developed with the impeller is called the __________ efficiency.

a.

manometric

b.

mechanical

c.

volumetric

d.

overall

Discuss
Answer: (a).manometric
Q174.
Pick out the wrong statement.

a.

The form drag is dependent upon the occurrence of a wake.

b.

The shear stress at any given cross-section of a pipe for steady flow (either laminar or turbulent) varies linearly as the radial distance.

c.

An ideal fluid is the one, which has negligible surface tension and obeys the Newton's law of viscosity.

d.

Existence of the boundary layer in fluid flow is because of viscosity of the fluid.

Discuss
Answer: (c).An ideal fluid is the one, which has negligible surface tension and obeys the Newton's law of viscosity.
Q175.
Mass velocity is independent of temperature & pressure, when the flow is

a.

unsteady through unchanged cross-section.

b.

steady through changing cross-section.

c.

steady and the cross-section is unchanged.

d.

unsteady and the cross-section is changed.

Discuss
Answer: (c).steady and the cross-section is unchanged.
Q176.
Very small pressure difference (< 5 mm water coloumn) can be most conveniently measured by a/an __________ manometer.

a.

U-tube water.

b.

U-tube mercury.

c.

inclined tube mercury.

d.

inclined tube water.

Discuss
Answer: (d).inclined tube water.
Q177.
For pipe flows, head is proportional to __________ at constant capacity(where, D = pipe diameter).

a.

1/D

b.

1/D²

c.

1/D⁵

d.

D²

Discuss
Answer: (c).1/D⁵
Q178.
For a given Reynold number as d/D for an orifice increases, Cd will (where, d & D are orifice & pipe diameters respectively).

a.

increase

b.

decrease

c.

remain constant

d.

either (a) or (b); depends on other factors

Discuss
Answer: (a).increase
Q179.
The ratio of wall drag to total drag in the Stoke's law range is

a.

0.5

b.

1

c.

1/3

d.

2/3

Discuss
Answer: (d).2/3
Q180.
Rotary vacuum pumps can reduce the absolute pressure to as low as __________ mm Hg.

a.

1

b.

0.1

c.

0.01

d.

0.001

Discuss
Answer: (c).0.01
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