Hydraulics and Fluid Mechanics in ME
A moving fluid mass may be brought to a static equilibrium position, by applying an imaginary inertia force of the same magnitude as that of the accelerating force but in the opposite direction. This statement is called

Archimedes’s principle
D-Alembert’s principle
None of these
Pascal’s law

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Hydraulics and Fluid Mechanics in ME
Coefficient of resistance is the ratio of

Actual velocity of jet at vena-contracta to the theoretical velocity
Loss of head in the orifice to the head of water available at the exit of the orifice
Actual discharge through an orifice to the theoretical discharge
Area of jet at vena-contracta to the area of orifice

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Hydraulics and Fluid Mechanics in ME
The hydraulic efficiency of a reaction turbine, is the ratio of

None of these
Power produced by the turbine to the energy actually supplied by the turbine
Actual work available at the turbine to energy imparted to the wheel
Work-done on the wheel to the energy (or head of water) actually supplied to the turbine

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