Buoyancy & Flotation PYQs, GPSC Civil Engineering MCQs

The line of action of the buoyant force acts through the

A) centroid of the volume of any floating body

B) centroid of the displaced volume of fluid

C) centroid of the horizontal projection of the body

D) centre of gravity of any submerged body

B) centroid of the displaced volume of fluid


The metacentric height of a body equals distance between

A) the metacentre and centre of gravity

B) the centre of gravity and centre of buoyancy

C) the centre of buoyancy and metacentre

D) None of above

A) the metacentre and centre of gravity


Submerged unit weight is based on principle of

A) Darcy

B) Terzaghi

C) Archmedis

D) Reynolds

C) Archmedis


The metacentric height is the distance between the

A) center of gravity of the floating body and the center of buoyancy

B) center of gravity of the floating body and metacenter

C) metacenter and center of buoyancy

D) original center buoyancy and new center of buoyancy

B) center of gravity of the floating body and metacenter


The point about which a floating body starts oscillating when the body is tilted is called:

A) centre of buoyancy

B) centre of gravity

C) centre of pressure

D) metacentre

D) metacentre


A floating body is in a state of stable equilibrium when its

A) metacentre is below its centre of gravity

B) metacentre is above its centre of gravity

C) centre of gravity is below the centre of buoyancy

D) metacentric height is zero

B) metacentre is above its centre of gravity


Water displaced by a floating wooden block of density 0.75 and size 5m long, 2m wide and 3m high, is

A) 17.5 m3

B) 22.5 m3

C) 25 m3

D) 17.5 km3

B) 22.5 m3


A metal body floats at the interface of water and oil (sp. gr. = 0.85) such that 35% of its volume is submerged in water and 65% in oil. The density of metal would be

A) 852.5 kg/m3

B) 912.5 kg/m3

C) 902.5 kg/m3

D) Cannot be determined

C) 902.5 kg/m3


For a submerged body, if the centre of buoyancy is above the centre of gravity, the equilibrium is called as

A) stable equilibrium

B) unstable equilibrium

C) neutral equilibrium

D) restoring equilibrium

A) stable equilibrium


A body floating in a liquid is said to be in neutral equilibrium, if its metacentre

A) coincides with the centre of gravity.

B) lies above the centre of gravity.

C) lies below the centre of gravity

D) lies between the centre of buoyancy and centre of gravity.

A) coincides with the centre of gravity.


Practice Test On Buoyancy & Flotation PYQs, Fluid Mechanics PYQs (Section 1-1)

GPSC Civil Engineering Previous Year Asked Questions

1 / 10

The point about which a floating body starts oscillating when the body is tilted is called:

2 / 10

For a submerged body, if the centre of buoyancy is above the centre of gravity, the equilibrium is called as

3 / 10

Submerged unit weight is based on principle of

4 / 10

A metal body floats at the interface of water and oil (sp. gr. = 0.85) such that 35% of its volume is submerged in water and 65% in oil. The density of metal would be

5 / 10

The metacentric height is the distance between the

6 / 10

A floating body is in a state of stable equilibrium when its

7 / 10

A body floating in a liquid is said to be in neutral equilibrium, if its metacentre

8 / 10

Water displaced by a floating wooden block of density 0.75 and size 5m long, 2m wide and 3m high, is

9 / 10

The metacentric height of a body equals distance between

10 / 10

The line of action of the buoyant force acts through the

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