Related Questions

The theoretical velocity of jet at vena contracta is (where H = Head of water at vena contracta)
A $$2{\text{gH}}$$
B $${\text{H}}\sqrt {2{\text{g}}} $$
C $$2{\text{g}}\sqrt {\text{H}} $$
D $$\sqrt {2{\text{gH}}} $$
In an internal mouthpiece, if the jet after contraction does not touch the sides of the mouthpiece, then the mouthpiece is said to be
A Running full
B Running free
C Partially running full
D Partially running free
In a short cylindrical external mouthpiece, the vena contracta occurs at a distance __________ the diameter of the orifice from the outlet of orifice.
A Equal to
B One-fourth
C One-third
D One-half
The discharge through a convergent mouthpiece is __________ the discharge through an internal mouthpiece of the same diameter and head of water.
A Equal to
B One-half
C Three fourth
D Double
The coefficient of discharge in case of internal mouthpiece is __________ that of external mouthpiece.
A Less than
B More than
C Equal to
D None of these
An internal mouthpiece is said to be running free if the length of the mouthpiece is __________ the diameter of the orifice.
A Less than twice
B More than twice
C Less than three times
D More than three times
An internal mouthpiece is said to be running __________ if the length of the mouthpiece is more than three times the diameter of the orifice.
A Free
B Partially
C Full
D None of these
Vena-contracta pressure tapping is at a distance __________ from the position of an orificemeter fitted in a pipe of internal diameter 'd'
A d
B 0.5d
C 2d
D 4d
Re-entrant or Borda's mouthpiece is an __________ mouthpiece.
A Internal
B External
C Both A and B
D None of these
Vena-contracta formed during flow of a liquid through an orificemeter has
A Minimum liquid cross-section
B More diameter compared to orifice diameter
C Minimum velocity of fluid stream
D None of these

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