Hydraulics and Fluid Mechanics Questions

• An internal mouthpiece is said to be running __________ if the length of the mouthpiece is more than three times the diameter of the orifice.
• A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a
• In a venturiflume, the flow takes place at
• A nozzle placed at the end of a water pipe line discharges water at a
• In order to avoid tendency of separation at throat in a venturimeter, the ratio of the diameter at throat to the diameter of pipe should be
• If the depth of water in an open channel is less than the critical depth, the flow is called
• A fluid whose viscosity changes with the rate of deformation or shear strain is known as non-newtonian fluid.
• A fluid which obeys the Newton's law of viscosity is termed as
• A weir, generally, used as a spillway of a dam is
• The discharge in an open channel corresponding to critical depth is
• A nozzle is generally made of
• According to Darcy's formula, the loss of head due to friction in the pipe is (where f = Darcy's coefficient, l = Length of pipe, v = Velocity of liquid in pipe, and d = Diameter of pipe)
• The separation of flow occurs when the hydrodynamic boundary layer thickness is reduced to zero.
• When the flow in an open channel is gradually varied, the flow is said to be
• The discharge through a convergent mouthpiece is __________ the discharge through an internal mouthpiece of the same diameter and head of water.
• The pressure at a stagnation point is always low.
• The divergent portion of a venturimeter is made longer than convergent portion in order to
• The quantity of a liquid flowing per second through a section of a pipe or a channel is called discharge and is measured in cumecs (m3/s).
• The total head of a liquid particle in motion is equal to
• The force of buoyancy is always __________ the weight of the liquid displaced by the body.