Q. The discharge through a small rectangular orifice is given by (where Cd = Coefficient of discharge for the orifice, a = Cross-sectional area of the orifice, h = Height of the liquid above the centre of the orifice)

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Q. The siphon will work satisfactorily, if the minimum pressure in the pipe is __________ vapour pressure of liquid.

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Q. The difference between the notch and weir is that the notch is of bigger size and the weir is of a smaller size.

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Q. An open tank containing liquid is moving with an acceleration on an inclined plane. The inclination of the free surface of the liquid will be __________ to the acceleration of the tank.

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Q. Euler's number is the ratio of __________ force to pressure force.

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Q. A flow is called sub-sonic, if the Mach number is

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Q. The discharge of a depressed nappe is 6 to 7 percent __________ that of a free nappe.

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Q. Re-entrant or Borda's mouthpiece is an __________ mouthpiece.

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Q. The flow in a pipe is neither laminar nor turbulent when Reynold number is

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Q. The intensity of pressure on an immersed surface __________ with the increase in depth.

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Q. When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is

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Q. The total energy line lies over the centre line of the pipe by an amount equal to

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Q. A piezometer tube is used only for measuring

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Q. The flow in a pipe is turbulent when Reynold number is

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Q. When a tank containing liquid moves with an acceleration in the horizontal direction, then the free surface of the liquid

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Q. The most economical section of a rectangular channel is one which has hydraulic mean depth or hydraulic radius equal to

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Q. The ratio of velocity of fluid in an undisturbed stream to the velocity of sound wave is known as Mach number.

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Q. The length AB of a pipe ABC in which the liquid is flowing has diameter (d1) and is suddenly contracted to diameter (d2) at B which is constant for the length BC. The loss of head due to sudden contraction, assuming coefficient of contraction as 0.62, is

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Q. All the gases are considered to have compressible flow and all the liquids are considered to have incompressible flow.

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Q. When a cylindrical vessel containing liquid is revolved, the surface of the liquid takes the shape of

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