Power required to drive a centrifugal pump is directly proportional to _________ of its impeller.
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Mechanical Engineering · all questionsHydraulics And Fluid Mechanics
Hydraulics And Fluid Mechanics
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Which of the following is an example of laminar flow?
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According to Newton's law of viscosity, the shear stress on a layer of a fluid is __________ to the rate of shear strain.
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When a liquid is flowing through a pipe, the velocity of the liquid is
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The torque required to overcome viscous resistance of a footstep bearing is (where = Viscosity of the oil, N = Speed of the shaft, R = Radius of the shaft and t = Thickness of the oil film)
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A glass tube of smaller diameter is used while performing an experiment for the capillary rise of water because
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The angle of taper on draft tube is
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The working of which of the following hydraulic units is based on Pascal's law?
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When a body floating in a liquid, is displaced slightly, it oscillates about
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A flow in which each liquid particle has a definite path, and the paths of individual particles do not cross each other, is called
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A double overhung Pelton wheel has
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A compound pipe of diameter d1, d2 and d3 having lengths and is to be replaced by an equivalent pipe of uniform diameter d and of the same length as that of the compound pipe. The size of the equivalent pipe is given by
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The normal stress is same in all directions at a point in a fluid
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Air vessels in reciprocating pump are used to
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The optimum value of vane exit angle for a centrifugal pump impeller is
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The specific speed (Ns) of a centrifugal pump is given by
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In an outward flow reaction turbine
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In an inward flow reaction turbine
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If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water, the horse power required will be
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The efficiency of jet propulsion for a ship with inlet orifices at right angles to the direction of motion of ship is given by
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