A water tank contains 1.3 m deep water. The pressure exerted by the water per metre length of the tank is

A)
2.89 kN
B)
8.29 kN
C)
9.28 kN
D)
28.9 kN

Correct Answer : Option (B) :   8.29 kN

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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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