Hydraulics and Fluid Mechanics Questions

• The tendency of a liquid to uplift a submerged body, because of the upward thrust of the liquid, is known as buoyancy.
• The flow of water through the hole in the bottom of a wash basin is an example of
• The velocity at which the laminar flow stops, is known as
• The ratio of the inertia force to the gravity force is called Froude number.
• A vertically immersed surface is shown in the below figure. The distance of its centre of pressure from the water surface is
• The efficiency of power transmission through pipe is (where H = Total supply head, and hf = Head lost due to friction in the pipe)
• A water tank contains 1.3 m deep water. The pressure exerted by the water per metre length of the tank is
• A glass tube of smaller diameter is used while performing an experiment for the capillary rise of water because
• A manometer can be used to measure vacuum pressures.
• The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a rectangular notch is given by
• A flow in which __________ force is dominating over the viscosity is called turbulent flow.
• When the pressure intensity at a point is less than the local atmospheric pressure, then the difference of these two pressures is called vacuum pressure.
• Which of the following statement is wrong?
• The discharge through an external mouthpiece is given by (where a = Cross-sectional area of the mouthpiece, and H = Height of liquid above the mouthpiece)
• The depth of water in a channel corresponding to the minimum specific energy is known as critical depth.
• In an external or internal mouthpiece, the absolute pressure head at vena contracta is zero when atmospheric pressure head is 10.3 m of water.
• A flow through a long pipe at constant rate is called
• The Francis formula for the discharge over Cippoletti weir is
• A flow in which each liquid particle does not have a definite path and the paths of individual particles also cross each other, is called turbulent flow.
• The Euler's equation for the motion of liquids is based upon the assumption that