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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The centre of pressure for a vertically immersed surface lies at a distance equal to __________ the centre of gravity.

Ax̅ / IG above
IG / Ax̅ below
IG / Ax̅ above
Ax̅ / IG below

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Hydraulics and Fluid Mechanics in ME
The power transmitted through the pipe is maximum when the head lost due to friction is equal to

One-half of the total supply head
Two-third of the total supply head
One-third of the total supply head
One-fourth of the total supply head

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Hydraulics and Fluid Mechanics in ME
A hydraulic press has a ram of 15 cm diameter and plunger of 1.5 cm. It is required to lift a weight of 1 tonne. The force required on plunger is equal tc

10 kg
1 kg
1000 kg
100 kg

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Hydraulics and Fluid Mechanics in ME
A channel is said to be of most economical cross-section, if

All of these
It involves lesser excavation for the designed amount of discharge
It gives maximum discharge for a given cross-sectional area and bed slope
It has minimum wetted perimeter

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Hydraulics and Fluid Mechanics in ME
A valve is suddenly closed in a water main in wl.ich the velocity is 1 m/sec and velocity of pressure wave is 981 m/ sec. The inertia head at the valve will be

10m
1 m
100m
None of these

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Hydraulics and Fluid Mechanics in ME
The pressure measured with the help of a Piezometer tube is in

N/m2
Head of liquid
N/mm2
All of these

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