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NGA 70: Properties of Natural Gas and Abnormal Operating Conditions Exam QUESTIONS AND CORRECT ANSWERS

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NGA 70: Properties of Natural Gas and Abnormal Operating Conditions Exam QUESTIONS AND CORRECT ANSWERS Natural Gas - CORRECT ANSWERS Mixture of methane, propane, ethane, cardbon dioxide, butane, hydrogen, nitrogen. Gas cna be transported in gas or liquid state. Weight of gas is 0.6 air is 1.0. Propane is heavier than air +1.0. Gas burns a clean blue flame. Mercaptan - CORRECT ANSWERS Odorant (sulfur) added to gas for smell detection of leaks. New steel pipe may contribute to odor fade because of small rust deposits in the pipe. Gravity of Gas - CORRECT ANSWERS 0.6 Gravity of Carbon Monoxide - CORRECT ANSWERS Gravity of Air - CORRECT ANSWERS Gravity of Propane - CORRECT ANSWERS 1.0 1.56 Gravity of Gasoline Vapors - CORRECT ANSWERS Gravity of Fuel Oil Vapors - CORRECT ANSWERS 1 degree Fahrenheit (for every) - CORRECT ANSWERS 7 Degree Fahrenheit (per) - CORRECT ANSWERS Highly Flammable - CORRECT ANSWERS 5% - 15% 0.96 3.5 4.5 14 PSIG 100 PSIG

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NGA 70: Properties of Natural Gas and
Abnormal Operating Conditions Exam
QUESTIONS AND CORRECT ANSWERS
Natural Gas - CORRECT ANSWERS Mixture of methane, propane, ethane, cardbon
dioxide, butane, hydrogen, nitrogen. Gas cna be transported in gas or liquid state. Weight of
gas is 0.6 air is 1.0. Propane is heavier than air +1.0. Gas burns a clean blue flame.


Mercaptan - CORRECT ANSWERS Odorant (sulfur) added to gas for smell detection
of leaks. New steel pipe may contribute to odor fade because of small rust deposits in the
pipe.


Gravity of Gas - CORRECT ANSWERS 0.6



Gravity of Carbon Monoxide - CORRECT ANSWERS 0.96



Gravity of Air - CORRECT ANSWERS 1.0



Gravity of Propane - CORRECT ANSWERS 1.56



Gravity of Gasoline Vapors - CORRECT ANSWERS 3.5



Gravity of Fuel Oil Vapors - CORRECT ANSWERS 4.5



1 degree Fahrenheit (for every) - CORRECT ANSWERS 14 PSIG



7 Degree Fahrenheit (per) - CORRECT ANSWERS 100 PSIG



Highly Flammable - CORRECT ANSWERS 5% - 15%

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