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 2 of 77

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Q11.
A centrifugal pump is used to pump water through a horizontal distance of 150 m, and then raised to an overhead tank 10 m above. The pipe is smooth with an I.D of 50 mm. What head (m of water) must the pump generate at its exit (E) to deliver water at a flow rate of 0.001 m³/s? The Fanning friction factor, f is 0.0062.

a.

10 m

b.

11 m

c.

12 m

d.

20 m

Discuss
Answer: (b).11 m
Q12.
Pick out the Kozney-Karman equation (valid for low Nส€โ‚‘) for fluid flow through a packed bed of solids.

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q13.
Characteristic curves for a centrifugal pump plotted against its capacity is shown in the diagram. x, y and z denote respectively

a.

efficiency, head and B.H.P.

b.

head, efficiency and B.H.P.

c.

B.H.P., efficiency and head

d.

efficiency, B.H.P. and head

Discuss
Answer: (b).head, efficiency and B.H.P.
Q14.
Specific speed for a centrifugal pump is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q15.
For flow through a venturi at a particular discharge, the correct relationships among velocities at point X, Y and Z would be

a.

Vโ‚ < Vโ‚‚ < Vโ‚ƒ

b.

Vโ‚‚ > Vโ‚ and Vโ‚‚ > Vโ‚ƒ

c.

Vโ‚ > Vโ‚‚ > Vโ‚ƒ

d.

none of these.

Discuss
Answer: (b).Vโ‚‚ > Vโ‚ and Vโ‚‚ > Vโ‚ƒ
Q16.
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.
Q17.
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)
Q18.
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
Q19.
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.
Q20.
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
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