Fluid Mechanics & Hydraulics (3140611) MCQs

MCQs of Fluid Statics

Showing 1 to 10 out of 32 Questions
1.
The point at which the resultant pressure on an immersed surface acts is known as
(a) centre of pressure
(b) centre of gravity
(c) centre of depth
(d) centre of buoyancy
Answer:

Option (a)

2.
The centre of pressure acts……………...the centre of gravity of immersed surface.
(a) at
(b) above
(c) below
(d) same point
Answer:

Option (c)

3.
When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the………of the two pressures.
(a) sum
(b) difference
(c) arithmetic mean
(d) geometric mean
Answer:

Option (b)

4.
A uniform body 3 m long, 2 m wide and 1 m deep floats in water. If the depth of immersion 0.6 m, then the weight of the body is
(a) 3.53 kN
(b) 33.5 kN
(c) 35.3 kN
(d) 40.5 kN
Answer:

Option (c)

5.
A pipeline which is 6 m in diameter contains a gate valve. The pressure at the centre of the pipe is 25 Ncm2. If the pipe is filled with specific gravity 0.8, find the force exerted by the oil upon the gate.
(a) 7.06 MN
(b) 14.12 MN
(c) 3.53 MN
(d) 28.24 MN
Answer:

Option (a)

6.
Find the total pressure on a rectangular plate of dimensions 2×3 m immersed in a fluid of specific gravity 0.65 at a depth of 6 m from the surface.
(a) 22.9 Ncm2
(b) 45.8 Ncm2
(c) 11.5 Ncm2
(d) None of the mentioned
Answer:

Option (a)

7.
Determine the centre of pressure on an isosceles triangle plate of base 6m and altitude 6m when it is immersed vertically in oil of specific gravity 0.75. The base of the plate coincides with the free surface of the oil.
(a) 6 m
(b) 3 m
(c) 9 m
(d) 12 m
Answer:

Option (b)

8.
A circular plate 5.0 m diameter is immersed in such a way that its greatest and least depth below the free surface are 3 m and 1 m respectively. determine the position of the centre of pressure.
(a) 2.5 m
(b) 5 m
(c) 4.5 m
(d) 6 m
Answer:

Option (a)

9.
When a body floating in a liquid, is given a small angular displacement, it starts oscillating about a point known
(a) centre of pressure
(b) centre of gravity
(c) centre of gravity
(d) metacentre
Answer:

Option (d)

10.
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)

Showing 1 to 10 out of 32 Questions