Q. The depth of centre of pressure (h) for a vertically immersed surface from the liquid surface is given by (where IG = Moment of inertia of the immersed surface about horizontal axis through its centre of gravity, A = Area of immersed surface, and x = Depth of centre of gravity of the immersed surface from the liquid surface)

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Q. The velocity at which the turbulent flow starts is known as higher critical velocity.

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Q. According to Francis formula, the discharge over a rectangular weir is (where n = Number of end contractions)

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Q. The specific weight is also known as weight density.

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Q. In a lockgate, the reaction between two gates is (where P = Resultant pressure on the lock gate, and α = Inclination of the gate with the normal to the side of the lock)

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Q. The mercury does not wet the glass. This is due to the property of the liquid known as

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Q. The coefficient of discharge in case of internal mouthpiece is __________ that of external mouthpiece.

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Q. The centre of pressure for a vertically immersed surface lies at a distance equal to __________ the centre of gravity.

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Q. According to Manning's formula, the discharge through an open channel is (where M = Manning's constant)

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Q. When the venturimeter is inclined, then for a given flow it will show __________ reading.

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Q. The pressure of air __________ with the increase of height from the surface of the earth.

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Q. The sheet of water flowing over a notch or a weir is known as

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Q. A body floating in a liquid is said to be not in equilibrium if its metacentre lies below its centre of gravity.

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Q. A flow in which the quantity of liquid flowing per second is not constant, is called

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Q. In a sharp-crested weir, the thickness of the weir is kept less than half of the height of water above the crest of the weir.

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Q. The most efficient section of a channel is

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Q. According to Bernoulli's equation

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Q. The ratio of the inertia force to the elastic force is called

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Q. An opening in the side of a tank or vessel such that the liquid surface with the tank is below the top edge of the opening, is called

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Q. The total pressure on the top of a closed cylindrical vessel of radius (r) completely filled up with liquid of specific weight (w) and rotating at (ω) rad/s about its vertical axis, is

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