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)

wQ (Hs + Hd)

wQHd

wQHs

wQ (Hs - Hd)

wQ (Hs + Hd)

wQHd

wQHs

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Hydraulics and Fluid Mechanics in ME
The purpose of a surge tank is

To control the pressure variations due to rapid changes in the pipe line flow

To eliminate water hammer possibilities

To regulate flow of water to turbines by providing necessary retarding head of water

All of these

To control the pressure variations due to rapid changes in the pipe line flow

To eliminate water hammer possibilities

To regulate flow of water to turbines by providing necessary retarding head of water

All of these

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Hydraulics and Fluid Mechanics in ME
The efficiency of a hydraulic press is given by (where W = Weight lifted by ram, P = Force applied on plunger, A = Area of ram, and a = Area of plunger)

(p/W) × (A/a)

(p/W) × (a/A)

(W/p) × (a/A)

(W/p) × (A/a)

(p/W) × (A/a)

(p/W) × (a/A)

(W/p) × (a/A)

(W/p) × (A/a)

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Hydraulics and Fluid Mechanics in ME
The loss of head at exit of a pipe is (where v = Velocity of liquid in the pipe)

0.75v²/2g

v²/2g

0.5v²/2g

0.375v²/2g

0.75v²/2g

v²/2g

0.5v²/2g

0.375v²/2g

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Hydraulics and Fluid Mechanics in ME
In an internal mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to height of the liquid above the vena contracta.

None of these

Less than

More than

Equal to

None of these

Less than

More than

Equal to

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Hydraulics and Fluid Mechanics in ME
Rain drops are spherical because of

viscosity

surface tension forces

air resistance

atmospheric pressure

viscosity

surface tension forces

air resistance

atmospheric pressure

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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 purpose of a surge tank is

Hydraulics and Fluid Mechanics in ME The efficiency of a hydraulic press is given by (where W = Weight lifted by ram, P = Force applied on plunger, A = Area of ram, and a = Area of plunger)

Hydraulics and Fluid Mechanics in ME The loss of head at exit of a pipe is (where v = Velocity of liquid in the pipe)

Hydraulics and Fluid Mechanics in ME In an internal mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to height of the liquid above the vena contracta.

Hydraulics and Fluid Mechanics in ME Rain drops are spherical because of

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 purpose of a surge tank is

Hydraulics and Fluid Mechanics in ME
The efficiency of a hydraulic press is given by (where W = Weight lifted by ram, P = Force applied on plunger, A = Area of ram, and a = Area of plunger)

Hydraulics and Fluid Mechanics in ME
The loss of head at exit of a pipe is (where v = Velocity of liquid in the pipe)

Hydraulics and Fluid Mechanics in ME
In an internal mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to height of the liquid above the vena contracta.

Hydraulics and Fluid Mechanics in ME
Rain drops are spherical because of