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NGA 70 (ACTUAL / ) STUDY SET WITH QUESTIONS
AND 100% VERIFIED ANSWERS
too rich gas-air mixture 15-100 % gas -- this will eventually become explosive as it mixes with air
products of incomplete combustion co2, water vapor, carbon monoxide, aldehydes
ignition temp of natural gas
1100 F
ignition temp of propane 874 F
ignition temp of butane 806 F
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ignition temp of gasoline, fuel oil 490 F
possible ignition sources communcation devices power tools/electronics engines lights doorbell static electricity on plastic pipe clothing
indictations of gas leak hissing noise, smell, insect activity, bubbling in standing water, vegetation damage
SIGHT,SMELL,SOUND
examples of AOCs abnormal flow/usage venting of gas
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