An air lock (or vapor lock) occurs when gas becomes trapped in a high point of a liquid-filled pipe system, partially or completely blocking the flow .
: Historically used in underwater tunnels and bridge foundations (caissons) to transition workers from atmospheric pressure to high-pressure work zones. air lock
: Air can enter a system during maintenance, pump restarts, or through dissolution in the liquid itself. air lock - Students | Britannica Kids | Homework Help An air lock (or vapor lock) occurs when
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