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 24 of 77

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Q231.
For turbulent flow of an incompressible fluid through a pipe, the flow rate Q is proportional to (ฮ” P)n, where ฮ”P is the pressure drop. The value of exponent 'n' is

a.

1

b.

0

c.

< 1

d.

> 1

Discuss
Answer: (c).< 1
Q232.
Reciprocating pumps are not able to compete with the centrifugal pump for industrial use, mainly because these pumps have

a.

very low speeds.

b.

smaller discharge.

c.

higher capital & maintenance cost.

d.

high vibrations.

Discuss
Answer: (c).higher capital & maintenance cost.
Q233.
The ratio of hydrodynamic boundary layer to thermal boundary layer thickness in case of liquid metals is

a.

< 1

b.

1

c.

> 1

d.

2

Discuss
Answer: (a).< 1
Q234.
The general relationship between speed N, head H, power P and discharge Q for a centrifugal pump is

a.

QโˆN : HโˆN² : PโˆN³

b.

QโˆN² : HโˆN³ : PโˆN

c.

QโˆN : HโˆN³ : PโˆN²

d.

QโˆN³ : HโˆN : PโˆN²

Discuss
Answer: (a).QโˆN : HโˆN² : PโˆN³
Q235.
What is the ratio of the velocity at the axis of the pipe to the mean velocity of flow in case of pipe flow under viscous condition ?

a.

0.5

b.

0.67

c.

1

d.

2

Discuss
Answer: (d).2
Q236.
Foot valve provided in the pump is a __________ valve.

a.

direction control

b.

back pressure

c.

relief

d.

pressure reduction

Discuss
Answer: (b).back pressure
Q237.
The discharge co-efficient for an orificemeter does not depend upon the

a.

pipe length.

b.

ratio of pipe diameter to orifice diameter.

c.

type of orifice & the Reynolds number.

d.

pipe diameter.

Discuss
Answer: (a).pipe length.
Q238.
If the head over the triangular notch is doubled, the discharge will increase by __________ times.

a.

2

b.

2.828

c.

5.657

d.

4

Discuss
Answer: (c).5.657
Q239.
Friction factor for a hydraulically smooth pipe at Nส€โ‚‘ = 2100 is fโ‚. If the pipe is further smoothened (i.e., roughness is reduced), the friction factor at the same value of Nส€โ‚‘, will

a.

increase.

b.

decrease.

c.

remain unchanged.

d.

increase or decrease depending on the pipe material.

Discuss
Answer: (a).increase.
Q240.
For the laminar flow of a fluid in a circular pipe of radius R, the Hagen-Poisseule equation predicts the volumetric flow rate to be proportional to

a.

R

b.

R²

c.

Rโด

d.

R^0.5

Discuss
Answer: (c).Rโด
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