A jet of water discharging from a 40 mm diameter orifice has a diameter of 32 mm at its vena contracta. The coefficient of contraction is

Related MCQs

• The theoretical velocity of jet at vena contracta is (where H = Head of water at vena contracta)
• In an internal mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to height of the liquid above the vena contracta.
• In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta.
• The discharge through a large rectangular orifice is given by (where H1 = Height of the liquid above the top of the orifice, H2 = Height of the liquid above the bottom of the orifice, b = Breadth of the orifice, and Cd = Coefficient of discharge)
• 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.
• In an internal mouthpiece, the absolute pressure head at vena contracta is
• In a short cylindrical external mouthpiece, the vena contracta occurs at a distance
• In a convergent mouthpiece, the absolute pressure head at vena contracta is the same as the of the atmosphere.
• In an external mouthpiece, the absolute pressure head at vena contracta is
• A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a