Hydraulics and Fluid Mechanics in ME - Mechanical Engineering Questions and Answers

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The speed of a turbine runner is

A.

Directly proportional to H^1/2

B.

Inversely proportional to H^1/2

C.

Directly proportional to H^3/2

D.

Inversely proportional to H^3/2

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The shear stress between the two liquid layers is __________ proportional to the distance between two layers.

A.

Directly

B.

Inversely

C.

Both A and B

D.

None of these

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According to fan laws, at constant pressure, the speed capacity and power vary

A.

Directly as the air or gas density

B.

Inversely as square root of density

C.

Inversely as density

D.

As square of density

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The force exerted (in Newton) by a jet of water impinging normally on a fixed plate is (where w = Specific weight of water in N/m3, a = Cross-sectional area of jet in m², and V = Velocity of jet in m/s)

A.

waV / 2g

B.

waV / g

C.

waV² / 2g

D.

waV² / g

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When a plate is immersed in a liquid parallel to the flow, it will be subjected to a pressure __________ that if the same plate is immersed perpendicular to the flow.

A.

Less than

B.

More than

C.

Equal to

D.

None of these