The hydraulic gradient line may be above or below the centre line of the pipe.

More Questions from Hydraulics and Fluid Mechanics

• A weir is usually made of masonry or concrete.
• The viscosity of water is __________ than that of mercury.
• The atmospheric pressure at sea level is
• The discharge over a rectangular weir, considering the velocity of approach, is (where H1 = Total height of water above the weir = H + Ha H = Height of water, over the crest of the weir, and Ha = Height of water, due to velocity of approach)
• The specific gravity has no units.
• The shear stress-strain graph for a newtonian fluid is a
• If a pitot tube is placed with its nose upstream, downstream or sideways, the reading will be the same in every case.
• The loss of pressure head in case of laminar flow is proportional to
• Whenever a plate is held immersed at some angle with the direction of flow of the liquid, it is subjected to some pressure. The component of this pressure, at right angles to the direction of flow of the liquid is known as lift.
• Reynold's number is the ratio of inertia force to

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