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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
When a piping system is made up primarily of friction head and very little of vertical lift, then pump characteristics should be

Nearly horizontal
Horizontal
First rise and then fall
Steep

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Hydraulics and Fluid Mechanics in ME
When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the __________ of the two pressures.

Geometric mean
Sum
Arithmetic mean
Difference

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Hydraulics and Fluid Mechanics in ME
The efficiency of a hydraulic press is given by (where W = Weight lifted by ram, P = Force applied on plunger, A = Area of ram, and a = Area of plunger)

(W/p) × (a/A)
(p/W) × (a/A)
(W/p) × (A/a)
(p/W) × (A/a)

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Hydraulics and Fluid Mechanics in ME
Bulk modulus of a fluid __________ as the pressure increases.

None of these
Remain same
Decreases
Increases

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Hydraulics and Fluid Mechanics in ME
Density of water is maximum at

0°K
0°C
100°C
4°C

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Hydraulics and Fluid Mechanics in ME
A body floats in stable equilibrium

When its meatcentric height is zero
When its e.g. is below its center of buoyancy
Metacentre has nothing to do with position of e.g. for determining stability
When the metacentre is above e.g.

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