Fluid Mechanics
The capacity of an accumulator is the maximum

Liquid which it can store
Energy which it can store
None of these
Discharge which it can deliver

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Fluid Mechanics
In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said to have the same hydraulic roughness, when they have equal values of

Friction co-efficient for flows at equal Reynold number
All of these
Absolute roughness
Relative roughness

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Fluid Mechanics
Turbine impeller

Produces only radial current
Is effective over wide range of viscosities
Produces only tangential current
Does not produce tangential current

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Fluid Mechanics
The continuity equation

None of these
Relates mass flow rate along a stream tube
Relates work and energy
Stipulates that Newton's second law of motion must be satisfied at every point in the fluid

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