Q. An internal mouthpiece is said to be running __________ if the length of the mouthpiece is more than three times the diameter of the orifice.

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Q. The reciprocal of Euler's number is called Newton number.

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Q. The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a triangular notch is given by

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Q. The separation of flow occurs when the hydrodynamic boundary layer thickness is reduced to zero.

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Q. If the depth of water in an open channel is less than the critical depth, the flow is called

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Q. A nozzle placed at the end of a water pipe line discharges water at a

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Q. When a body is immersed wholly or partially in a liquid, it is lifted up by a force equal to the weight of liquid displaced by the body. This statement is called

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Q. The total pressure on the top of a closed cylindrical vessel competely filled up with a liquid is

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Q. Poise is the unit of viscosity in C.G.S. system of units.

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Q. The discharge through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel.

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Q. When the Mach number is more than 6, the flow is called

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Q. The discharge through a convergent mouthpiece is __________ the discharge through an internal mouthpiece of the same diameter and head of water.

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Q. Kinematic viscosity is the product of dynamic viscosity and the density of the liquid.

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Q. A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a

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Q. A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall acts at a distance __________ from the liquid surface.

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Q. A nozzle is generally made of

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Q. The unit of surface tension is

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Q. The force of buoyancy is always __________ the weight of the liquid displaced by the body.

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Q. The coefficient of discharge is the ratio of dieoretical discharge to the actual discharge through an orifice.

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Q. The quantity of a liquid flowing per second through a section of a pipe or a channel is called discharge and is measured in cumecs (m³/s).

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