Fluid Dynamics MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Fluid Dynamics, a fundamental topic in the field of Fluid Mechanics. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Fluid Dynamics 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 Dynamics mcq questions that explore various aspects of Fluid Dynamics problems. Each MCQ is crafted to challenge your understanding of Fluid Dynamics principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Fluid Mechanics tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Fluid Dynamics MCQs are your pathway to success in mastering this essential Fluid Mechanics topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Fluid Dynamics. 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 Dynamics knowledge to the test? Let's get started with our carefully curated MCQs!

Fluid Dynamics MCQs | Page 7 of 7

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Q61.
In order to apply Bernoulli’s equation across two sections, we have to obtain it from Euler’s equation. What is the operation that needs to be carried out in order to obtain it from Euler’s equation?

a.

Partial Differentiation

b.

Differentiation

c.

Integration

d.

None of the mentioned

Discuss
Answer: (c).Integration
Q62.
Which of the following assumption is incorrect in the derivation of Bernoulli’s equation?

a.

The fluid is ideal

b.

The flow is steady

c.

The flow is incompressible

d.

The flow is rotational

Discuss
Answer: (d).The flow is rotational
Q63.
From mathematical perspective if for a fluid curl of velocity vector is some constant value, it is ideal, steady and incompressible, then we can apply Bernoulli’s equation.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
Q64.
If in a fluid, while applying Newton’s second law of motion, compressibility force is neglected then what equation is obtained?

a.

Navier Stoke’s Equation

b.

Reynold’s equation of motion

c.

Euler’s Equation of motion

d.

Continuity Equation for fluid flow

Discuss
Answer: (b).Reynold’s equation of motion
Q65.
According to statement of Bernoulli’s theorem if Kinetic or Potential Energy is changing then overall energy changes and hence energy is not constant at all the places.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
Q66.
In derivation for Euler’s equation, the weight of fluid element is considered as negligible and ignored in calculation.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
Q67.
Water is flowing through a pipe of 3.8 cm diameter under a pressure of 20 N/cm² (gauge) and with mean velocity of 3.7 m/s. Find the total head or total energy per unit weight of the water at a cross section, which is 7 m above the datum line.

a.

56.14 m

b.

28.07 m

c.

84.18 m

d.

10.52 m

Discuss
Answer: (b).28.07 m
Q68.
A fluid with specific gravity 0.85 is flowing through a diameter 250 mm and 150 mm at the bottom and upper ends respectively. Determine the difference in datum head if the rate of flow through pipe is 0.04 m³/s. Take pressure at top and bottom as 27 N/cm² and 10 N/cm².

a.

17.1 m

b.

34.2 m

c.

10.5 m

d.

None of the mentioned

Discuss
Answer: (a).17.1 m
Q69.
The below figure shows a pipe with a circular cross section of diameter 5 cm on the left end and a square cross section with diagonal 5 cm on the right end. Water enters the left end with a velocity 20 m/s and leaves the right end with a velocity V₂. Find V₂ (neglect losses in the pipe).

a.

V₂ cannot be found as the length of the pipe is not given

b.

V₂ cannot be found as the intermediate cross sections are not given

c.

31.41 m/s

d.

20 m/s

Discuss
Answer: (c).31.41 m/s
Q70.
In the below equation, the unit of E CANNOT be written as ______

a.

m²/s²

b.

J/kg

c.

Pa/m³

d.

kg.m/s²

Discuss
Answer: (d).kg.m/s²
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