Theoretical power required (in watts) to drive a reciprocating pump is (where w = Specific weight of liquid to be pumped in N/m3, Q = Discharge of the pump in m3/s, Hs = Suction head in meters, and Hd = Delivery head in meters)

Hydraulics and Fluid Mechanics in ME
Theoretical power required (in watts) to drive a reciprocating pump is (where w = Specific weight of liquid to be pumped in N/m3, Q = Discharge of the pump in m3/s, Hs = Suction head in meters, and Hd = Delivery head in meters)

wQ (Hs + Hd)

wQHd

wQ (Hs - Hd)

wQHs

wQ (Hs + Hd)

wQHd

wQ (Hs - Hd)

wQHs

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Hydraulics and Fluid Mechanics in ME
The length of a liquid stream while flowing over a weir __________ at the ends of the sill.

None of these

Contracts

Expands

Does not change

None of these

Contracts

Expands

Does not change

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Hydraulics and Fluid Mechanics in ME
The velocity corresponding to Reynold number of 2000 is called

Lower critical velocity

Higher critical velocity

Sub-sonic velocity

Super-sonic velocity

Lower critical velocity

Higher critical velocity

Sub-sonic velocity

Super-sonic velocity

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Hydraulics and Fluid Mechanics in ME
An air vessel is provided at the summit in a siphon to

Increase velocity

Maintain pressure difference

Increase discharge

Avoid interruption in the flow

Increase velocity

Maintain pressure difference

Increase discharge

Avoid interruption in the flow

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Hydraulics and Fluid Mechanics in ME
Which of the following pump is successfully used for lifting water to the turbines?

Centrifugal pump

Air lift pump

Reciprocating pump

Jet pump

Centrifugal pump

Air lift pump

Reciprocating pump

Jet pump

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Hydraulics and Fluid Mechanics in ME
If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water , the horse power required will be

H.P./0.75

Same

0.75 B.H.P

1.5 B.H.P

H.P./0.75

Same

0.75 B.H.P

1.5 B.H.P

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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME Theoretical power required (in watts) to drive a reciprocating pump is (where w = Specific weight of liquid to be pumped in N/m3, Q = Discharge of the pump in m3/s, Hs = Suction head in meters, and Hd = Delivery head in meters)

Hydraulics and Fluid Mechanics in ME The length of a liquid stream while flowing over a weir __________ at the ends of the sill.

Hydraulics and Fluid Mechanics in ME The velocity corresponding to Reynold number of 2000 is called

Hydraulics and Fluid Mechanics in ME An air vessel is provided at the summit in a siphon to

Hydraulics and Fluid Mechanics in ME Which of the following pump is successfully used for lifting water to the turbines?

Hydraulics and Fluid Mechanics in ME If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water , the horse power required will be

Hydraulics and Fluid Mechanics in ME
Theoretical power required (in watts) to drive a reciprocating pump is (where w = Specific weight of liquid to be pumped in N/m3, Q = Discharge of the pump in m3/s, Hs = Suction head in meters, and Hd = Delivery head in meters)

Hydraulics and Fluid Mechanics in ME
The length of a liquid stream while flowing over a weir __________ at the ends of the sill.

Hydraulics and Fluid Mechanics in ME
The velocity corresponding to Reynold number of 2000 is called

Hydraulics and Fluid Mechanics in ME
An air vessel is provided at the summit in a siphon to

Hydraulics and Fluid Mechanics in ME
Which of the following pump is successfully used for lifting water to the turbines?

Hydraulics and Fluid Mechanics in ME
If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water , the horse power required will be