nga 70 Exam Questions and Answers
Graded A+
dot 192.605 - Correct answer-follow a manual of procedures- must be updated at
intervals not exceeding 15 months but at least once per year- must respond to aoc
dot 192.615 - Correct answer-emergency plan: establish written procedures for
hazard
dot 192.616 - Correct answer-public awareness: write and implement public
education program with guidance from API
dot 192.751 - Correct answer-prevention of accidental ignition: remove potential
sources of ignition
dot 192.803 - Correct answer-definition: AOC: malfunction of component,
devitiation from normal operations
what gases is natural gas composed of - Correct answer-ehtane, propane, hydrogen,
methane, nitrogen, co2, butane
gases with SG > 1 are - Correct answer-heavier than air and hug the ground
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, products of natural gas - Correct answer-heat, co2, water vapor
what odorant us used in natural gas - Correct answer-mercaptin
what affects odor intensity - Correct answer-soil, sand, clay, loam, houshold
cleaners, rust deposits in steel pipe causing reaction with odorant, and plastic pipes
absorbing odorants.
SG of natural gas - Correct answer-0.6
SG of carbon monoxide - Correct answer-0.96
SG of air - Correct answer-1
SG of propane - Correct answer-1.56
SG of gas vapors - Correct answer-3.5
SG of fuel oil vapors - Correct answer-4.5
why is SG important - Correct answer-affects combustion properties at the burner
tip, and safety if gas is released in atmosphere
composition of natural gas - Correct answer-90-95% methane
2-4% ethane
2-4% inert gas
<1% propane
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
Graded A+
dot 192.605 - Correct answer-follow a manual of procedures- must be updated at
intervals not exceeding 15 months but at least once per year- must respond to aoc
dot 192.615 - Correct answer-emergency plan: establish written procedures for
hazard
dot 192.616 - Correct answer-public awareness: write and implement public
education program with guidance from API
dot 192.751 - Correct answer-prevention of accidental ignition: remove potential
sources of ignition
dot 192.803 - Correct answer-definition: AOC: malfunction of component,
devitiation from normal operations
what gases is natural gas composed of - Correct answer-ehtane, propane, hydrogen,
methane, nitrogen, co2, butane
gases with SG > 1 are - Correct answer-heavier than air and hug the ground
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, products of natural gas - Correct answer-heat, co2, water vapor
what odorant us used in natural gas - Correct answer-mercaptin
what affects odor intensity - Correct answer-soil, sand, clay, loam, houshold
cleaners, rust deposits in steel pipe causing reaction with odorant, and plastic pipes
absorbing odorants.
SG of natural gas - Correct answer-0.6
SG of carbon monoxide - Correct answer-0.96
SG of air - Correct answer-1
SG of propane - Correct answer-1.56
SG of gas vapors - Correct answer-3.5
SG of fuel oil vapors - Correct answer-4.5
why is SG important - Correct answer-affects combustion properties at the burner
tip, and safety if gas is released in atmosphere
composition of natural gas - Correct answer-90-95% methane
2-4% ethane
2-4% inert gas
<1% propane
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
