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 61 of 77

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Q601.
What is the ratio of displacement thickness to nominal thickness for a linear distribution of velocity in the boundary layer on a flat plate ?

a.

0.5

b.

1

c.

1.5

d.

2

Discuss
Answer: (a).0.5
Q602.
In turbulent flow, the

a.

fluid particles move in an orderly manner.

b.

momentum transfer is on molecular scale only.

c.

shear stress is caused more effectively by cohesion than momentum transfer.

d.

shear stresses are generally larger than in a similar laminar flow.

Discuss
Answer: (d).shear stresses are generally larger than in a similar laminar flow.
Q603.
Momentum correction factor used in fluid flow problems accounts for the

a.

change in direction of flow.

b.

change in total energy.

c.

change in pressure.

d.

non uniform direction of velocities at inlet & outlet sections.

Discuss
Answer: (d).non uniform direction of velocities at inlet & outlet sections.
Q604.
Viscosity of water is about __________ times that of air at room temperature.

a.

15

b.

55

c.

155

d.

1050

Discuss
Answer: (b).55
Q605.
Net positive suction head (NPSH) of a centrifugal pump must be

a.

greater than the vapour pressure of the liquid.

b.

less than the vapour pressure of the liquid.

c.

equal to the vapour pressure of the liquid.

d.

less than barometric pressure.

Discuss
Answer: (a).greater than the vapour pressure of the liquid.
Q606.
Actual lift of a pump is always less than the theoretical lift and is limited by the

a.

specific gravity & temperature of the liquid.

b.

leakage & pressure decreasing at higher elevations.

c.

frictional resistance through pipes, fittings & passages.

d.

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

Discuss
Answer: (d).all (a), (b) and (c).
Q607.
In case of unsteady fluid flow, conditions & flow pattern change with the passage of time at a position in a flow situation. Which of the following is an example of unsteady flow?

a.

Discharge of water by a centrifugal pump being run at a constant rpm.

b.

Water flow in the suction and discharge pipe of a reciprocating pump.

c.

Water discharge from a vertical vessel in which constant level is maintained.

d.

Low velocity flow of a highly viscous liquid through a hydraulically smooth pipe.

Discuss
Answer: (b).Water flow in the suction and discharge pipe of a reciprocating pump.
Q608.
Nature of fluid flow during the opening of a valve in a pipeline is

a.

laminar

b.

unsteady

c.

steady

d.

uniform

Discuss
Answer: (b).unsteady
Q609.
The __________ pressure is measured by a static tube.

a.

dynamic

b.

static

c.

total

d.

none of these

Discuss
Answer: (b).static
Q610.
The speed of a sound wave in a gas is analogous to the speed of

a.

an elementary wave in an open channel.

b.

flow in an open channel.

c.

a disturbance travelling upstream in moving fluid.

d.

none of these.

Discuss
Answer: (a).an elementary wave in an open channel.
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