Hydraulics and Fluid Mechanics in ME
A glass tube of smaller diameter is used while performing an experiment for the capillary rise of water because

All of these
It is not possible to conduct this experiment with any other tube
It is easier to see through the glass tube
Glass tube is cheaper than a metallic tube

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Hydraulics and Fluid Mechanics in ME
When a body is placed over a liquid, it will sink down if

None of these
Gravitational force is more than the up-thrust of the liquid
Gravitational force is equal to the up-thrust of the liquid
Gravitational force is less than the up-thrust of the liquid

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Hydraulics and Fluid Mechanics in ME
The discharge through a wholly drowned orifice is given by (where H1 = Height of water (on the upstream side) above the top of the orifice, H2 = Height of water (on the downstream side) above the bottom of the orifice, and H = Difference between two water levels on either side of the orifice)

Q = Cd × bH × √(2gh)
Q = Cd × b (H2 - H1) × √(2gh)
Q = Cd × bH₁ × √(2gh)
Q = Cd × bH2 × √(2gh)

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