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 29 of 77

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Q281.
Hydraulic diameter for non-circular ducts is equal to __________ times the area of flow divided by the perimeter.

a.

two

b.

three

c.

four

d.

eight

Discuss
Answer: (c).four
Q282.
Boundary layer thickness in laminar flow over a flat plate increases as (where, d = distance from the leading edge.)

a.

√d

b.

d^1/3

c.

d²

d.

d^2/3

Discuss
Answer: (a).√d
Q283.
Gradually varied flow in open channel is a/an __________ flow.

a.

steady uniform

b.

steady non-uniform

c.

unsteady uniform

d.

unsteady non-uniform

Discuss
Answer: (b).steady non-uniform
Q284.
The line of action of the buoyant force acts through the

a.

centroid of the displaced volume of fluid.

b.

centre of gravity of a submerged body.

c.

centroid of the volume of any floating body.

d.

none of these.

Discuss
Answer: (a).centroid of the displaced volume of fluid.
Q285.
Cavitation in a centrifugal pump can be avoided by keeping the

a.

inlet pressure high

b.

outlet pressure low

c.

inlet pressure low

d.

outlet pressure high

Discuss
Answer: (a).inlet pressure high
Q286.
Vane anemometer

a.

is an area meter.

b.

is a variable head meter.

c.

rotates an element at a speed determined by the velocity of the fluid in which the meter is immersed.

d.

none of these.

Discuss
Answer: (c).rotates an element at a speed determined by the velocity of the fluid in which the meter is immersed.
Q287.
Terminal velocity is

a.

a constant velocity with no acceleration.

b.

a fluctuating velocity.

c.

attained after moving one-half of total distance.

d.

none of these.

Discuss
Answer: (a).a constant velocity with no acceleration.
Q288.
Consider two pipes of same length and diameter through which water is passed at the same velocity. The friction factor for rough pipe is f₁ and that for smooth pipe is f₂. Pick out the correct statement.

a.

f₁ = f₂

b.

f₁ < f₂

c.

f₁ > f₂

d.

data not sufficient to relate f₁ & f₂

Discuss
Answer: (c).f₁ > f₂
Q289.
For an incompressible fluid, the bulk modulus of elasticity is

a.

5 kg/m³

b.

∞ N/m²

c.

1 N

d.

0 N/m

Discuss
Answer: (b).∞ N/m²
Q290.
A fluid is a substance, that

a.

has to be kept in a closed container.

b.

is almost incompressible.

c.

has zero shear stress.

d.

flows when even a small shear is applied to it.

Discuss
Answer: (d).flows when even a small shear is applied to it.
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