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.

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

Properties of Fluids MCQs | Page 11 of 12

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Q101.
An oil of vicosity 7 poise is used for lubrication between shaft and sleeve. The diameter of shaft is 0.6 m and it rotates is 360 rpm. Calculate the power lost in oil for a sleeve length of 160mm. The thickness of oil film is 1.0mm.

a.

25.31 kW

b.

50.62 kW

c.

37.97 kW

d.

12.65 kW

Discuss
Answer: (a).25.31 kW
Q102.
Find the capillarity rise or fall if a capillary tube of diameter .03m is immersed in hypothetical fluid with specific gravity 6.5, surface tension 0.25 N/m and angle of contact 147°.

a.

0.44mm fall

b.

0.88mm fall

c.

0.44mm rise

d.

0.88mm rise

Discuss
Answer: (a).0.44mm fall
Q103.
Will capillary rise occur and if it occurs what will be capillary rise if glass capillarity tube is immersed in water and experiment is carried out by astronauts in space.

a.

Capillarity rise will not occur

b.

Capillarity rise will occur infinitely and will come out in form of fountain

c.

Capillarity rise will occur finitely and will be the whole length of tube

d.

None of the mentioned

Discuss
Answer: (c).Capillarity rise will occur finitely and will be the whole length of tube
Q104.
The surface tension of fluid in contact with air at 25℃ is 0.51N/m. The pressure inside a droplet is to be 0.05 N/cm² greater than outside pressure. Determine the diameter of the droplet of water.

a.

4.08mm

b.

8.16mm

c.

2.04mm

d.

None of the mentioned

Discuss
Answer: (a).4.08mm
Q105.
If a fluid of certain surface tension and diameter is used to create a soap bubble and a liquid jet. Which of the two, bubble or liquid jet, will have greater pressure difference on the inside and outside.

a.

Liquid jet

b.

Soap bubble

c.

Both will have same pressure differrence

d.

None of the mentioned

Discuss
Answer: (b).Soap bubble
Q106.
Capillarity fall is reduced if we take the appartus (capillary tube immersed in fluid having acute angle of contact) considerable distance inside the earth( i.e below the earth crust).

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q107.
For liquid fluids will capillarity rise (or fall) increase or decrease with rise in temperature.

a.

Increase

b.

Decrease

c.

Remain constant

d.

First decrease then increase

Discuss
Answer: (b).Decrease
Q108.
Cavitation is more pronounced in rough pipes than smooth surfaced pipes.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q109.
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
Q110.
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
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