Hydraulics and Fluid Mechanics Questions

• A body floating in a liquid is said to be in a stable equilibrium, if its metacentre coincides with its centre of gravity.
• When an internal mouthpiece is running free, the discharge through the mouthpiece is (where a = Area of mouthpiece, and H = Height of liquid above the mouthpiece)
• A piezometer tube is used only for measuring
• A venturiflume is a flumed structure constructed across a channel by restricting its width.
• The velocity corresponding to Reynold number of 2000 is called
• The siphon will work satisfactorily, if the minimum pressure in the pipe is __________ vapour pressure of liquid.
• All the gases are considered to have compressible flow and all the liquids are considered to have incompressible flow.
• Select the correct statement
• The discharge of a depressed nappe is 6 to 7 percent __________ that of a free nappe.
• Euler's number is the ratio of __________ force to pressure force.
• The length AB of a pipe ABC in which the liquid is flowing has diameter (d1) and is suddenly contracted to diameter (d2) at B which is constant for the length BC. The loss of head due to sudden contraction, assuming coefficient of contraction as 0.62, is
• The difference between the notch and weir is that the notch is of bigger size and the weir is of a smaller size.
• When a tank containing liquid moves with an acceleration in the horizontal direction, then the free surface of the liquid
• Re-entrant or Borda's mouthpiece is an __________ mouthpiece.
• The ratio of velocity of fluid in an undisturbed stream to the velocity of sound wave is known as Mach number.
• The specific weight of water in S.I. units is taken as
• The density of air is same at different heights.
• The ratio of the inertia force to the surface tension force is called Weber's number.
• The rise, in water level, which occurs during the transformation of the unstable shooting flow to the stable streaming flow is called hydraulic jump.
• If a body floating in a liquid occupies a new position and remains at rest in this new position, when given a small angular displacement, The body is said to be in __________ equilibrium.