Red Seal Gasfitter Class A Practice Questions - Red Seal Gasfitter - Class A Exam

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Per CSA B149.1, which colour of personal protective equipment marking and what practice is required when purging a large gas main of air before commissioning?

Purge to atmosphere indoors with windows open Purge through a hose to a safe point outdoors, away from ignition sources Purge into the building's return-air duct to dilute the gas Purge into a sealed container in the mechanical room

Correct Answer:

Purge through a hose to a safe point outdoors, away from ignition sources

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