Buoyancy and Floatation MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Buoyancy and Floatation, 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 Buoyancy and Floatation 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 Buoyancy and Floatation mcq questions that explore various aspects of Buoyancy and Floatation problems. Each MCQ is crafted to challenge your understanding of Buoyancy and Floatation 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 Buoyancy and Floatation 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 Buoyancy and Floatation. 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 Buoyancy and Floatation knowledge to the test? Let's get started with our carefully curated MCQs!

Buoyancy and Floatation MCQs | Page 2 of 4

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Q11.
A stone weighs 650 N in air and 275 N in water. Compute its specific gravity.

a.

1.73

b.

2.45

c.

3.46

d.

0.865

Discuss
Answer: (a).1.73
Q12.
A body of dimensions 2.7 m * 3.8 m * 2.5 m, weighs 2500 N in water. Find its weight in air.

a.

254.12 kN

b.

508.25 kN

c.

101.65 kN

d.

127.06 kN

Discuss
Answer: (a).254.12 kN
Q13.
Find the density of metallic body which floats at the interface of mercury of sp.gr 13.6 and water such that 40 % of its volume is sub-merged in mercury and 60% in water.

a.

6040 kg/m³

b.

12080 kg/m³

c.

24160 kg/m³

d.

3020 kg/m³

Discuss
Answer: (a).6040 kg/m³
Q14.
What is the principal cause of action of buoyant force on a body submerged partially or fully in fluid?

a.

Displacement of fluid due to submerged body

b.

Development of force due to dynamic action

c.

Internal shear forces mitigating external forces

d.

None of the mentioned

Discuss
Answer: (a).Displacement of fluid due to submerged body
Q15.
How can relatively denser object be made to float on the less dense fluid?

a.

By altering the shape.

b.

By altering the forces acting on the object

c.

By altering the shear forces acting on the object

d.

None of the mentioned

Discuss
Answer: (a).By altering the shape.
Q16.
What happens to the buoyant force acting on the airship as it rises in the air?

a.

Buoyant force increases

b.

Buoyant force decreases

c.

Buoyant force remains constant

d.

Buoyant force first increases then shows decrease

Discuss
Answer: (b).Buoyant force decreases
Q17.
As a balloon rises in the air its volume increases, at the end it acquires a stable height and cannot rise any further.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q18.
Submarines use principle of ‘neutral buoyancy’ to go into the water.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q19.
A rectangular pontoon is 5 m long, 3 m wide and 1.40 m high. The depth of immersion of the pontoon is 0.60 m in seawater. If the centre of gravity is 0.7 m above the bottom of the pontoon, determine the metacentric height. The density for seawater = 1045 kg/m³.

a.

0.135

b.

0.271

c.

0.543

d.

0.068

Discuss
Answer: (a).0.135
Q20.
A uniform body of size 4 m long * 2.5 m wide * 1.5 m deep floats in water. What is the weight of the body if depth of immersion is 1 m ?

a.

147.1 kN

b.

294.3 kN

c.

73.5 kN

d.

588.6 kN

Discuss
Answer: (a).147.1 kN
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