Hydraulics and Fluid Mechanics Questions

• According to equation of continuity,
• A weir is said to be broad crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest.
• When a tube of smaller diameter is dipped in water, the water rises in the tube due to viscosity of water.
• The pressure measured with the help of a piezometer tube is in
• The coefficient of viscosity may be determined by
• The total energy line lies over the hydraulic gradient line by an amount equal to the
• Euler's equation in the differential form for the motion of liquids is given by
• The body will sink down if the force of buoyancy is __________ the weight of the liquid displaced.
• The kinematic viscosity is the
• The discharge through a large rectangular orifice is given by (where H1 = Height of the liquid above the top of the orifice, H2 = Height of the liquid above the bottom of the orifice, b = Breadth of the orifice, and Cd = Coefficient of discharge)
• The hydraulic gradient line may be above or below the centre line of the pipe.
• 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.