Fluid Mechanics and Hydraulic Machines (3141906) MCQs

MCQs of Static Forces on Surface and Buoyancy

Showing 11 to 20 out of 25 Questions
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11.
When a body, floating in a liquid, is given a small angular displacement, it starts oscillating about a point known as ...............
(a) centre of pressure
(b) centre of gravity
(c) centre of buoyancy
(d) metacentre
Answer:

Option (d)

12.
The metacentric height is the distance between the
(a) centre of gravity of the floating body and the centre of buoyancy
(b) centre of gravity of the floating body and the metacentre
(c) metacentre and centre of buoyancy
(d) original centre of buoyancy and new centre of buoyancy
Answer:

Option (b)

13.
When a body is placed over a liquid, it will sink down if ...............
(a) gravitational force is equal to the upthrust of the liquid
(b) gravitational force is less than the upthrust of the liquid
(c) gravitational force is more than the upthrust of the liquid
(d) none of the above
Answer:

Option (c)

14.
When a body is placed over a liquid, it will float if ..............
(a) gravitational force is equal to the upthrust of the liquid
(b) gravitational force is less than the upthrust of the liquid
(c) gravitational force is more than the upthrust of the liquid
(d) none of the above
Answer:

Option (b)

15.
When a body is immersed wholly or partially in a liquid, it is lifted up by a force equal to the weight of the liquid displaced by the body. This statement is called ...........
(a) Pascal's law
(b) Archimede's principle
(c) Principle of floatation
(d) Bernoulli’s theorem
Answer:

Option (b)

16.
The force of buoyancy is always ………..... the weight of the liquid displaced by the body.
(a) equal to
(b) less than
(c) more than
(d) none of above
Answer:

Option (a)

17.
The body will float if the force of buoyancy is …………. the weight of the liquid displaced.
(a) equal to
(b) less than
(c) more than
(d) none of the above
Answer:

Option (c)

18.
The body will sink down if the force of buoyancy is……the weight of the liquid.
(a) equal to
(b) less than
(c) more than
(d) none of the above
Answer:

Option (b)

19.
The centre of gravity of the volume of the liquid displaced is called
(a) centre of pressure
(b) centre of buoyancy
(c) metacentre
(d) none of these
Answer:

Option (b)

20.
The buoyancy depends upon the
(a) weight of the liquid displaced
(b) pressure with which the liquid is displayed
(c) viscosity of the liquid
(d) compressibility of the liquid
Answer:

Option (a)

Showing 11 to 20 out of 25 Questions
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