Hydraulics and Fluid Mechanics in ME
The length AB of a pipe ABC in which the liquid is flowing has diameter (d1) and is suddenly contracted to diameter (d2) at B which is constant for the length BC. The loss of head due to sudden contraction, assuming coefficient of contraction as 0.62, is

v₁²/2g
v₂²/2g
0.5 v₁²/2g
0.375 v₂²/2g

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Hydraulics and Fluid Mechanics in ME
The total head of a liquid particle in motion is equal to

Kinetic head - (pressure head + potential head)
Pressure head - (kinetic head + potential head)
Potential head - (pressure head + kinetic head)
Pressure head + kinetic head + potential head

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