MCQs of Static Forces on Surface and Buoyancy (Fluid Mechanics and Hydraulic Machines - 3141906)

Fluid Mechanics and Hydraulic Machines (3141906) MCQs

MCQs of Static Forces on Surface and Buoyancy

Showing 1 to 10 out of 25 Questions

The total pressure on a horizontally immersed surface is

(a)	$ρ g A$
(b)	$ρ g \bar{h}$
(c)	$ρ g A \bar{h}$
(d)	none of the above

The total pressure on an immersed surface inclined at an angle θ with the liquid surface is

(a)	$ρ g A$
(b)	$ρ g \bar{h}$
(c)	$ρ g A \bar{h}$
(d)	$\frac{ρ g A \bar{h}}{\sin θ}$

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

The centre of pressure acts……………...the centre of gravity of immersed surface.

(a)	at
(b)	above
(c)	below
(d)	same point

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

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

A pipe line which is 6 m in diameter contains a gate valve. The pressure at the centre of the pipe is 25

N / c m^{2}

. 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

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 $N / c m^{2}$
(b)	45.8 $N / c m^{2}$
(c)	11.5 $N / c m^{2}$
(d)	none of the above

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

10.

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

Showing 1 to 10 out of 25 Questions