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OQ 70

Horizontales
Valve that might vent from overpressure
Causes gas to expand and contract
Discussed during the morning job briefing
Number one ignition source (2 words)
Odorant added to natural gas
Verticales
5% to 15% of gas in the air
Natural gas is _____ than air
Causes pilot light to extinguish (2 words)
Main component of natural gas
Needed to burn: gas,_____, and ignition source