Civil Engineering MCQAE Level Civil Engineering
A siphon works on the principle of:
Fluid MechanicsSiphonMEDIUM
Choose the correct answer
A
Capillary action
B
Atmospheric pressure driving flow over a summit
C
Hydraulic gradient only
D
Gravity flow downhill
Correct Answer
B. Atmospheric pressure driving flow over a summit
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In a siphon, atmospheric pressure on the inlet surface drives flow over the summit (where pressure is below atmospheric). The siphon stops working when the pressure at the summit falls below the vapor pressure (cavitation).
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