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!

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Properties of Fluids MCQs | Page 9 of 12

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Q81.
What will be the diameter (in mm) of a water droplet, the pressure inside which is 0.05 N/cm² greater than the outside pressure? (Take surface tension as 0.075 N/m)

a.

3

b.

0.3

c.

0.6

d.

6

Discuss
Answer: (c).0.6
Q82.
A soap bubble of d mm diameter is observed inside a bucket of water. If the pressure inside the bubble is 0.075 N/cm², what will be the value of d? (Take surface tension as 0.075 N/m)

a.

0.4

b.

0.8

c.

1.6

d.

4

Discuss
Answer: (b).0.8
Q83.
A liquid jet of 5 cm diameter has a pressure difference of N/m². (Take surface tension as 0.075 N/m)

a.

12

b.

6

c.

3

d.

1.5

Discuss
Answer: (d).1.5
Q84.
The rise in the level of a liquid in a tube is h. What will be the rise in the level if the same amount of liquid is poured into a tube of half the diameter.

a.

0

b.

h/2

c.

h

d.

2h

Discuss
Answer: (d).2h
Q85.
The ratio of the surface tension S and density ฯ of liquid 1 and 2 are 1:2 and 1:4 respectively. Equal amount of the two liquids is poured into two identical tubes. What will be the ratio of the rise in the liquid level in the two tubes? (Assume the angle of contact to be same)

a.

1:2

b.

2:1

c.

8:1

d.

1:8

Discuss
Answer: (b).2:1
Q86.
The rise in the level of a liquid in a tube is h. If half the amount is poured outside, what will be the new rise in liquid level?

a.

0

b.

h/2

c.

h

d.

2h

Discuss
Answer: (c).h
Q87.
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
Q88.
The graph shows relation between shear stress Z and velocity gradient du/dy of a fluid is given by Z = A * (du/dy)โฟ where A and n are constants. The graphs are drawn for three values of n. Which one will be the correct relationship between nโ‚, nโ‚‚ and nโ‚ƒ?

a.

nโ‚ > nโ‚‚ > nโ‚ƒ

b.

nโ‚ < nโ‚‚ < nโ‚ƒ

c.

nโ‚ > nโ‚ƒ > nโ‚‚

d.

nโ‚ < nโ‚ƒ < nโ‚‚

Discuss
Answer: (b).nโ‚ < nโ‚‚ < nโ‚ƒ
Q89.
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
Q90.
If a glass tube of 10 mm diameter is immersed in water, what will be the rise or fall in capillary?

(Take surface tension = 0.075 N/m, g = 10 m/s² and angle of contact = 0)

a.

0.75

b.

1.5

c.

3

d.

6

Discuss
Answer: (c).3
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