Hydraulics and Fluid Mechanics Questions

• The velocity of the liquid flowing through the divergent portion of a venturimeter
• The mercury does not wet the glass. This is due to the property of the liquid known as
• The total pressure on the top of a closed cylindrical vessel of radius (r) completely filled up with liquid of specific weight (w) and rotating at (ω) rad/s about its vertical axis, is
• The ratio of the inertia force to the elastic force is called
• The theoretical velocity of jet at vena contracta is (where H = Head of water at vena contracta)
• The depth of centre of pressure (h) for a vertically immersed surface from the liquid surface is given by (where IG = Moment of inertia of the immersed surface about horizontal axis through its centre of gravity, A = Area of immersed surface, and x = Depth of centre of gravity of the immersed surface from the liquid surface)
• The rise of liquid along the walls of a revolving cylinder about the initial level is __________ the depression of the liquid at the axis of rotation.
• A fluid having no viscosity is known as
• The loss of head due to viscosity for laminar flow in pipes is (where d = Diameter of pipe, l = Length of pipe, v = Velocity of the liquid in the pipe, μ = Viscosity of the liquid, and w = Specific weight of the flowing liquid)
• The viscosity of water at 20°C is
• The pressure of air __________ with the increase of height from the surface of the earth.
• A body floating in a liquid is said to be not in equilibrium if its metacentre lies below its centre of gravity.
• According to Manning's formula, the discharge through an open channel is (where M = Manning's constant)
• The intensity of pressure at any point, in a liquid, is __________ to the depth of liquid from the surface.
• The coefficient of discharge in case of internal mouthpiece is __________ that of external mouthpiece.
• The shear stress-strain graph for a non-newtonian fluid is a curve.
• According to Bernoulli's equation
• An opening in the side of a tank or vessel such that the liquid surface with the tank is below the top edge of the opening, is called
• The centre of pressure for a vertically immersed surface lies at a distance equal to __________ the centre of gravity.
• The magnitude of water hammer depends upon the