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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Q. When an internal mouthpiece is running free, the discharge through the mouthpiece is (where a = Area of mouthpiece, and H = Height of liquid above the mouthpiece)

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Q. A flow through an expanding tube at increasing rate is called unsteady non-uniform flow.

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Q. Water is __________ liquid.

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Q. With an increase in size of tube, the rise or depression of liquid in the tube due to surface tension will

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Q. In a short cylindrical external mouthpiece, the vena contracta occurs at a distance __________ the diameter of the orifice from the outlet of orifice.

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Q. Viscous force is the __________ of shear stress due to viscosity and cross-sectionar area of flow.

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Q. The density of air is same at different heights.

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Q. The total pressure on a horizontally immersed surface is (where w = Specific weight of the liquid, A = Area of the immersed surface, and x = Depth of the centre of gravity of the immersed surface from the liquid surface)

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Q. A body floating in a liquid is said to be in a stable equilibrium, if its metacentre coincides with its centre of gravity.

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Q. A flow whose streamline is represented by a curve, is called

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Q. When the Mach number is less than unity, the flow is called

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Q. When the end contractions of the weir are suppressed, then number of end contractions (n) are taken as zero

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

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