Civil Engineering MCQAE Level Civil Engineering
The head loss at the sudden expansion of a pipe (Borda-Carnot formula) is:
Fluid MechanicsPipe Head Loss MinorMEDIUM
Choose the correct answer
A
(V1 - V2)^2 / (2g)
B
(V1 + V2)^2 / (2g)
C
V1^2 / (2g)
D
(V1^2 - V2^2) / (2g)
Correct Answer
A. (V1 - V2)^2 / (2g)
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Borda-Carnot loss at sudden expansion: h_L = (V1 - V2)^2 / (2g). This is derived from momentum and continuity equations and is exact for sudden expansions.
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