Hydraulics and Fluid Mechanics Questions

• In a lockgate, the reaction between two gates is (where P = Resultant pressure on the lock gate, and α = Inclination of the gate with the normal to the side of the lock)
• Newton's law of viscosity is a relationship between
• The property of a liquid which offers resistance to the movement of one layer of liquid over another adjacent layer of liquid, is called
• In a sharp-crested weir, the thickness of the weir is kept less than half of the height of water above the crest of the weir.
• A flow is called super-sonic if the
• When the venturimeter is inclined, then for a given flow it will show __________ reading.
• The specific weight is also known as weight density.
• The specific weight of compressible fluids does not remain constant.
• The discharge over the trapezoidal notch is equal to the discharge over the rectangular notch __________ the discharge over the triangular notch.
• A flow in which the quantity of liquid flowing per second is constant, is called __________ flow.
• Venturimeter is used to
• According to Francis formula, the discharge over a rectangular weir is (where n = Number of end contractions)
• The dynamic viscosity of gases __________ with rise in temperature.
• According to Newton's law of viscosity, the shear stress on a layer of a fluid is __________ to the rate of shear strain.
• Bernoulli's equation is applied to
• The velocity at which the turbulent flow starts is known as higher critical velocity.
• The property of a liquid which enables it to resist tensile stress is called its surface tension.
• The discharge through a channel of rectangular section will be maximum, if
• A hemispherical tank of radius (R) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to lower the level of liquid from (H1) to (H2) will be
• The coefficient of venturifiume, generally, lies between