Properties of Fluids MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Properties of Fluids, 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 Properties of Fluids 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 Properties of Fluids mcq questions that explore various aspects of Properties of Fluids problems. Each MCQ is crafted to challenge your understanding of Properties of Fluids 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 Properties of Fluids MCQs are your pathway to success in mastering this essential Fluid Mechanics topic.

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Properties of Fluids MCQs | Page 6 of 12

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Q51.
In liquids in order to measure the viscosity of fluid experimentally we consider the variation of shear stress with respect to what property?

a.

strain

b.

shear strain

c.

rate of shear strain

d.

none of the mentioned

Discuss
Answer: (c).rate of shear strain
Q52.
For a compressible fluid the kinematic viscosity is affected by temperature and pressure variation.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q53.
Which of the following statement is true about vapor pressure of a liquid?

a.

Vapor pressure is closely related to molecular activity and temperature of the liquid

b.

Vapor pressure is closely related to molecular activity but independent of the temperature of the liquid

c.

Vapor pressure is not affected by molecular activity and temperature of the liquid

d.

Vapor pressure is not affected by molecular activity and is independent of the temperature of the liquid

Discuss
Answer: (a).Vapor pressure is closely related to molecular activity and temperature of the liquid
Q54.
Which of the following equation correctly depicts the relation between the vapor pressure of a liquid and it’s temperature?

a.

Vapor pressure increases linearly with the increase in temperature of the liquid

b.

Vapor pressure increases slightly with the increase in temperature of the liquid at low temperatures and the rate of increase goes high at higher temperatures

c.

Vapor pressure increases rapidly with the increase in temperature of the liquid at low temperatures and the rate of increase goes low at higher temperatures

d.

Vapor pressure remains unchanged with the increase in temperature of the liquid

Discuss
Answer: (b).Vapor pressure increases slightly with the increase in temperature of the liquid at low temperatures and the rate of increase goes high at higher temperatures
Q55.
The space between two plates (20cm*20cm*1cm), 1 cm apart, is filled with a liquid of viscosity 1 Poise. The upper plate is dragged to the right with a force of 5N keeping the lower plate stationary.
What will be the velocity in m/s of flow at a point 0.5 cm below the lower surface of the upper plate if linear velocity profile is assumed for the flow?

a.

1.25

b.

2.5

c.

12.5

d.

0.25

Discuss
Answer: (c).12.5
Q56.
The graph shows relation between shear stress Z and velocity gradient du/dy of a fluid is given by Z = A * (du/dy)ⁿ where A and n are constants. The graphs are drawn for three values of n. Which one will be the correct relationship between n₁, n₂ and n₃?

a.

n₁ > n₂ > n₃

b.

n₁ < n₂ < n₃

c.

n₁ > n₃ > n₂

d.

n₁ < n₃ < n₂

Discuss
Answer: (b).n₁ < n₂ < n₃
Q57.
A soap film is trapped between a frame and a wire of length 10 cm as shown. If the surface tension is given as 0.0049 N/m, what will be the value of m (in mg) such that the wire remains in equilibrium?

a.

0.1

b.

1

c.

10

d.

100

Discuss
Answer: (d).100
Q58.
Which of the following is the condition for the boiling of a liquid?

a.

Absolute pressure of a liquid must be greater than or equal to it’s vapor pressure

b.

Absolute pressure of a liquid must be less than or equal to it’s vapor pressure

c.

Absolute pressure of a liquid must be equal to it’s vapor pressure

d.

Absolute pressure of a liquid must be greater than it’s vapor pressure

Discuss
Answer: (b).Absolute pressure of a liquid must be less than or equal to it’s vapor pressure
Q59.
Which of the following machines have the possibility of cavitation?

a.

Reaction turbines and centrifugal pumps

b.

Reaction turbines and reciprocating pumps

c.

Impulse turbines and centrifugal pumps

d.

Impulse turbines and reciprocating pumps

Discuss
Answer: (a).Reaction turbines and centrifugal pumps
Q60.
The three liquids 1, 2, and 3 with vapor pressures V1, V2 and V3 respectively, are kept under same pressure. If V1 > V2 > V3, which liquid will start boiling early?

a.

liquid 1

b.

liquid 2

c.

liquid 3

d.

they will start boiling at the same time

Discuss
Answer: (a).liquid 1
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