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 1 of 77

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Q1.
Three piping networks as shown in the figure are placed horizontally. They are made using identical pipe segments and are subjected to the same pressure drop across them. Assuming no pressure losses at junctions, the flow rates across the three networks are related as Q₁ : Q₂ : Q₃.

a.

1:√3:2

b.

1:2:3

c.

1:2:2

d.

1:√2:√2

Discuss
Answer: (c).1:2:2
Q2.
For flow through an orifice from a reservoir, the actual velocity at the vena con-tracta is given by

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q3.
Which of the following is the 'Blaussius equation', relating friction factor to the Reynolds number ?

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q4.
The energy equation, given by following equation, where (E = internal energy/mass), is applicable to

a.

perfect gases only.

b.

isothermal flow of gases.

c.

adiabatic unsteady flow of gases.

d.

all compressible fluids.

Discuss
Answer: (d).all compressible fluids.
Q5.
What is the ratio of fluid carrying capacity of two pipes having diameters d₁ and d₂ respectively ?

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q6.
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.
Q7.
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)
Q8.
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
Q9.
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.
Q10.
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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