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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Q. One poise is equal to

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Q. Reynold's number is the ratio of the inertia force to the

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Q. A uniform body 3 m long, 2 m wide and 1 m deep floats in water. If the depth of immersion is 0.6 m, then the weight of the body is

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Q. A weir is said to be narrow-crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest.

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Q. The total pressure on an immersed surface inclined at an angle θ with the liquid surface is

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Q. Turbulent flow takes place at high velocities.

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Q. When a plate is immersed in a liquid parallel to the flow, it will be subjected to a pressure __________ that if the same plate is immersed perpendicular to the flow.

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