Q. In a footstep bearing, if the speed of the shaft is doubled, then the torque required to overcome the viscous resistance will be

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Q. The viscosity of water is __________ than that of mercury.

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Q. An open tank containing liquid is made to move from rest with a uniform acceleration. The angle 0 which the free surface of liquid makes with the horizontal is such that (where a = Horizontal acceleration of the tank, and g = Acceleration due to gravity)

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Q. The discharge over a triangular notch is

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Q. The discharge through an external mouthpiece is given by (where a = Cross-sectional area of the mouthpiece, and H = Height of liquid above the mouthpiece)

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Q. The loss of pressure head in case of laminar flow is proportional to

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Q. The flow of water through the hole in the bottom of a wash basin is an example of

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Q. The Francis formula for the discharge over Cippoletti weir is

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Q. Laminar flow __________ place at very low velocities.

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Q. A manometer can be used to measure vacuum pressures.

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Q. The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a rectangular notch is given by

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Q. The tendency of a liquid to uplift a submerged body, because of the upward thrust of the liquid, is known as buoyancy.

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Q. If a body floating in a liquid does not return back to its original position, and heels farther "away when given a small angular displacement, the body is said to be in neutral equilibrium.

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Q. The length of the divergent cone in a venturimeter is __________ that of the convergent cone.

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Q. A flow through a long pipe at constant rate is called

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Q. The volume per unit mass of a liquid is called specific volume.

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Q. In an external or internal mouthpiece, the absolute pressure head at vena contracta is zero when atmospheric pressure head is 10.3 m of water.

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Q. The shear stress-strain graph for a newtonian fluid is a

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Q. If a pitot tube is placed with its nose upstream, downstream or sideways, the reading will be the same in every case.

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Q. A flow in which each liquid particle does not have a definite path and the paths of individual particles also cross each other, is called turbulent flow.

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