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)

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

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Hydraulics and Fluid Mechanics in ME
The total head of a liquid particle in motion is equal to

Pressure head - (kinetic head + potential head)
Pressure head + kinetic head + potential head
Potential head - (pressure head + kinetic head)
Kinetic head - (pressure head + potential head)

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