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.

Related MCQs

• 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 or internal mouthpiece, the absolute pressure head at vena contracta is zero when atmospheric pressure head is 10.3 m of water.
• 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)
• In an external mouthpiece, the absolute pressure head at vena contracta is
• 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
• In a convergent mouthpiece, the absolute pressure head at vena contracta is the same as the of the atmosphere.
• In a short cylindrical external mouthpiece, the vena contracta occurs at a distance
• In an internal mouthpiece, if the jet after contraction does not touch the sides of the mouthpiece, then the mouthpiece is said to be
• In an internal mouthpiece, if the jet after contraction does not touch the sides of the mouthpiece, then the mouthpiece is said to be