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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Q. The power absorbed (in watts) in overcoming the viscous resistance of a footstep bearing is

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Q. The intensity of pressure at any point, in a liquid, is

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

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Q. A submerged body is said to be in a stable equilibrium, if its centre of gravity __________ the centre of buoyancy.

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Q. The critical depth for a channel is given by (where q = Unit discharge (discharge per unit width) through the channel)

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Q. The liquid used in manometers should have

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Q. The hydraulic mean depth or the hydraulic radius is the ratio of

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Q. The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point, is known as

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Q. A hemispherical tank of radius (R) has an orifice of cross-sectional area (a) at its bottom and is full of liquid. The time required to empty the tank completely is

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Q. Stoke is the unit of

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