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 23 of 77

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Q221.
The flow of a liquid through tapering pipe at a constant rate is an example of __________ flow.

a.

steady uniform

b.

steady non uniform

c.

unsteady uniform

d.

unsteady non uniform

Discuss
Answer: (b).steady non uniform
Q222.
Pick out the correct statement pertaining to transition/ entrance length in fluid flow.

a.

The length of entrance region of pipe, in which full development of fluid flow takes place such that velocity profile does not change downstream, is called the transition length.

b.

Transition length for laminar flow of Newtonion fluids in a pipe of diameter 'd' is equal to 0.05. D.Nส€โ‚‘.

c.

Transition length for turbulent flow of Newtonion fluids in a smooth pipe of diameter 'd' is equal to 50 D.

d.

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

Discuss
Answer: (d).all (a), (b) and (c).
Q223.
A perfect gas

a.

does not satisfy PV = nRT.

b.

is incompressible and has zero viscosity.

c.

has constant specific heat.

d.

can't develop shear stresses.

Discuss
Answer: (c).has constant specific heat.
Q224.
Which of the following is the most common pump for pumping either raw sewage or sludge ?

a.

Electromagnetic pump

b.

Centrifugal pump

c.

Reciprocating pump

d.

Gear pump

Discuss
Answer: (c).Reciprocating pump
Q225.
Transition length for a turbulent fluid entering into a pipe is around __________ times the pipe diameter.

a.

5

b.

50

c.

500

d.

1000

Discuss
Answer: (b).50
Q226.
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
Q227.
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.
Q228.
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
Q229.
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
Q230.
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
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