When an ideal fluid flows past a sphere

Hydraulics and Fluid Mechanics in ME
When an ideal fluid flows past a sphere

total drag is zero

lowest pressure intensity occurs at front stagnation point

lowest pressure intensity occurs at rear stagnation point

highest intensity of pressure occurs around the circumference at right angles to flow

total drag is zero

lowest pressure intensity occurs at front stagnation point

lowest pressure intensity occurs at rear stagnation point

highest intensity of pressure occurs around the circumference at right angles to flow

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Hydraulics and Fluid Mechanics in ME
The discharge through an external mouthpiece is given by (where a = Cross-sectional area of the mouthpiece, and H = Height of liquid above the mouthpiece)

1.855 aH.√(2g)

1.585 a.√(2gH)

0.855 a.√(2gH)

5.85 aH.√(2g)

1.855 aH.√(2g)

1.585 a.√(2gH)

0.855 a.√(2gH)

5.85 aH.√(2g)

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Hydraulics and Fluid Mechanics in ME
A flow in which the volume of a fluid and its density does not change during the flow is called _________ flow.

Incompressible

Compressible

Viscous

None of these

Incompressible

Compressible

Viscous

None of these

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Hydraulics and Fluid Mechanics in ME
A vertically immersed surface is shown in the below figure. The distance of its centre of pressure from the water surface is

b²/12 + x̅

(d²/12 x̅) + x̅

(bd²/12) + x̅

d²/12 + x̅

b²/12 + x̅

(d²/12 x̅) + x̅

(bd²/12) + x̅

d²/12 + x̅

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Hydraulics and Fluid Mechanics in ME
Unit of surface tension is

Both of the above

Velocity/unit area

Energy/unit area

It has no units

Both of the above

Velocity/unit area

Energy/unit area

It has no units

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Hydraulics and Fluid Mechanics in ME
Manometric head, in case of a centrifugal pump, is equal to

Suction lift + Loss of head in suction pipe due to friction + Delivery lift + Loss of head in delivery pipe due to friction + Velocity head in the delivery pipe

All of these

Energy per kN at outlet of impeller Energy per kN at inlet of impeller

Work-done per kN of water Losses within the impeller

Suction lift + Loss of head in suction pipe due to friction + Delivery lift + Loss of head in delivery pipe due to friction + Velocity head in the delivery pipe

All of these

Energy per kN at outlet of impeller Energy per kN at inlet of impeller

Work-done per kN of water Losses within the impeller

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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME When an ideal fluid flows past a sphere

Hydraulics and Fluid Mechanics in ME The discharge through an external mouthpiece is given by (where a = Cross-sectional area of the mouthpiece, and H = Height of liquid above the mouthpiece)

Hydraulics and Fluid Mechanics in ME A flow in which the volume of a fluid and its density does not change during the flow is called _________ flow.

Hydraulics and Fluid Mechanics in ME A vertically immersed surface is shown in the below figure. The distance of its centre of pressure from the water surface is

Hydraulics and Fluid Mechanics in ME Unit of surface tension is

Hydraulics and Fluid Mechanics in ME Manometric head, in case of a centrifugal pump, is equal to

Hydraulics and Fluid Mechanics in ME
When an ideal fluid flows past a sphere

Hydraulics and Fluid Mechanics in ME
The discharge through an external mouthpiece is given by (where a = Cross-sectional area of the mouthpiece, and H = Height of liquid above the mouthpiece)

Hydraulics and Fluid Mechanics in ME
A flow in which the volume of a fluid and its density does not change during the flow is called _________ flow.

Hydraulics and Fluid Mechanics in ME
A vertically immersed surface is shown in the below figure. The distance of its centre of pressure from the water surface is

Hydraulics and Fluid Mechanics in ME
Unit of surface tension is

Hydraulics and Fluid Mechanics in ME
Manometric head, in case of a centrifugal pump, is equal to