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GATE 2019: Fluid Mechanics Quiz 2

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Question 1

The arch of a bridge over a river in the form of semi circle of radius 4 m .The bridge width is 10 m .Due to a flood the water level raises 2 m above the crest of the arch. The horizontal thrust (in MN) on the half of the arch is  ___

Question 2

What would be the height of water level h when the gate will automatically tip(take width to be unity). Hinged at 1m above ground level as shown in diagram.

Question 3

The centre of pressure of any submerged plane vertical surface is _______

Question 4

When a dolphin glides through air, it experiences an external pressure of 0.75 m of mercury. The absolute pressure on dolphin when it is 5 m below the free surface of the water is ________.

Question 5

A section of a dam made of concrete, ρ= 2.6, total height = 35 m, with top walkway width of 6 m, is shown. The upstream bottommost point is called the Heel of the dam. The sloped part on downstream side is 3 vertical on 2 horizontal. Water stands till 2m short of the top of the dam section. The net resultant force acting on the base level of the dam is nearly. Take the length of the dam unity.

Question 6

What is the vertical component of pressure force on submerged curved surface equal to?
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