Q. A notch is, usually, made of a metallic plate.

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Q. In an internal mouthpiece, if the jet after contraction expands and fills up the whole mouthpiece, then the mouthpiece is said to be running free.

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Q. A channel is said to be of most economical cross-section, if

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Q. The top of the weir over which the water flows is known as

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Q. A moving fluid mass may be brought to a static equilibrium position, by aplying an imaginary inertia force of the same magnitude as that of the accelerating force but in the opposite direction. This statement is called

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Q. The pressure at a stagnation point is always low.

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Q. When an internal mouthpiece is running full, the discharge through the mouthpiece is twice the discharge when it is running free.

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Q. In two dimensional flow, the flow does not take place in a curve.

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Q. In order to avoid tendency of separation at throat in a venturimeter, the ratio of the diameter at throat to the diameter of pipe should be

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Q. The ratio of the inertia force to the __________ is called Euler's number.

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Q. When the flow in an open channel is gradually varied, the flow is said to be

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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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