Q. Liquid delivery by centrifugal pump starts, only when the head developed by it is equal to the __________ head.

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Q. The speed of sound in an ideal gas varies as the

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Q. The maximum head that can be developed by a single impeller is __________ ft.

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Q. Hydraulic radius is the ratio of

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Q. The unit of bulk modulus of elasticity for a liquid in S.I. unit is

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Q. Power requirement of fans having constant wheel diameter varies __________ fan speed.

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Q. In the low Reynolds number region, the drag force on a sphere is proportional to

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Q. The peripherial velocity at inlet of a centrifugal pump having inlet diameter of 25 cms and rotating at 950 rpm is __________ m/sec.

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Q. Laminar flow is characterised by the nonexistence of

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Q. The length of the tube necessary for the boundary layer to reach the centre of the tube and for fully developed flow to be established is called the __________ length.

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Q. Select the correct practical example of steady non-uniform flow.

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Q. Hydraulic diameter for non-circular ducts is equal to __________ times the area of flow divided by the perimeter.

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Q. Boundary layer thickness in laminar flow over a flat plate increases as (where, d = distance from the leading edge.)

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Q. Gradually varied flow in open channel is a/an __________ flow.

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Q. The line of action of the buoyant force acts through the

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Q. Cavitation in a centrifugal pump can be avoided by keeping the

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Q. Vane anemometer

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Q. Terminal velocity is

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Q. Consider two pipes of same length and diameter through which water is passed at the same velocity. The friction factor for rough pipe is f₁ and that for smooth pipe is f₂. Pick out the correct statement.

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Q. For an incompressible fluid, the bulk modulus of elasticity is

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