Q. When the Mach number is equal to unity, the flow is called sonic flow.

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Q. The total pressure on the bottom of a closed cylindrical vessel completely filled up with a liquid is the sum of the total centrifugal pressure and the weight of the liquid in the vessel.

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Q. A weir, generally, used as a spillway of a dam is

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Q. A thick liquid like a syrup has a __________ viscosity than a light liquid like water.

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Q. The highest efficiency is obtained with a channel of __________ section.

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Q. A vessel of 4 m³ contains an oil which weighs 30 kN. The specific weight of the oil is

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Q. Coefficient of discharge Cd is equal to (where Cc = Coefficient of contraction, Cv = Coefficient of velocity, and Cr = Coefficient of resistance)

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Q. In an internal mouthpiece, if the jet after contraction does not touch the sides of the mouthpiece, then the mouthpiece is said to be

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Q. The value of coefficient of velocity for a sharp edged orifice __________ with the head of water.

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Q. The shear stress between the two liquid layers is __________ proportional to the distance between two layers.

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Q. The mass per unit volume of a liquid at a standard temperature and pressure is called

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Q. The centre of pressure acts __________ the centre of gravity of immersed surface.

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Q. A flow through an expanding tube at constant rate is called

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Q. When a body is placed over a liquid, it is subjected to gravitational force and upthrust of the liquid.

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Q. Bulk modulus of a fluid is the ratio of

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Q. The pressure at a point 4 m below the free surface of water is

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Q. A structure used to dam up a stream or river over which the water flows is called

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Q. The coefficient of discharge for an external mouthpiece depends upon

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Q. The depth of centre of pressure lor an immersed surface inclined at an angle θ with the liquid surface lies at a distance equal to __________ the centre of gravity.

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Q. The water pressure per metre length on a vertical masonry wall of dam is (where w = Specific weight of the liquid, and H = Height of the liquid)

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