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.

A)
less than
B)
more than
C)
Can not Say
D)
None of the above

Correct Answer : Option (A) :   less than

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Free surface of a liquid tends to contract to the smallest possible area due to force of
A)
Friction
B)
Surface tension
C)
Viscosity
D)
Cohesion

Correct Answer :   Surface tension

Which of the following turbine is preferred for a specific speed of 60 to 300 r.p.m.?
A)
Kaplan turbine
B)
Pelton wheel
C)
Francis turbine
D)
None of the above

Correct Answer :   Francis turbine

If 850 kg liquid occupies volume of one cubic meter, men 0.85 represents its
A)
Specific mass
B)
Specific gravity
C)
Specific weight
D)
Specific density

Correct Answer :   Specific gravity

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