Practice Test for Task 70 - Characteristics of Natural Gas
UPDATED ACTUAL Questions and CORRECT Answers
90% How much methane is in natural gas?
4% What is the percentage of ethane in natural gas?
4% There is ______ % nitrogen in natural gas.
1% What is the percentage of propane and heavier hydrocarbons in natural gas?
Ethane What is the one component that distinguishes natural gas from other gasses?
, Tasteless What are the five characteristics of natural gas?
Colorless
Odorless
Non-toxic
Lighter than air
Impurities What is removed from natural gas when it is processed?
Mercaptan What is added to natural gas when it is processed?
An organic compound added to natural gas What is mercaptan?
It gives it an identifiable odor for safety reasons What benefit does mercaptan give to natural gas?
If gas passes through areas of decayed matter What are 3 reasons that gas odor intensity may be decreased or masked?
Various soil compositions
New pipelines
abnormal operating condition Improper odorization is an ____________________ _.
An under-odorization condition What could a release of gas with no odor detected indicate?
It rises quickly and mixes with air What happens when natural gas is released into the atmosphere?
At ground level Where will propane, gasoline and fuel oil settle?
path of least resistance Natural gas will follow the _______________ _.
Soil conditions What plays a big role in the way gas travels?
Prevents it from traveling upwards and causes it to What does moist soil do to gas?
accumulate underground.
Dry soil What type of soil allows gas to move freely?
It forms a barrier at ground level that does not allow What does frozen soil do to gas?
leaking gas to rise.
Yes; through soft trenches and cracks in foundations Can gas migrate sideways? if so, through what?
No; it can accumulate far from the initial leak. It can Does a gas leak always stay near its source? if not, how does it travel?
travel through sewers and underground duct lines.
It expands What happens to natural gas when it is heated?
It contracts What happens to natural gas when it is cooled?
1 degree Fahrenheit How far will the gas temperature drop for every 14psi reduction in pressure?
UPDATED ACTUAL Questions and CORRECT Answers
90% How much methane is in natural gas?
4% What is the percentage of ethane in natural gas?
4% There is ______ % nitrogen in natural gas.
1% What is the percentage of propane and heavier hydrocarbons in natural gas?
Ethane What is the one component that distinguishes natural gas from other gasses?
, Tasteless What are the five characteristics of natural gas?
Colorless
Odorless
Non-toxic
Lighter than air
Impurities What is removed from natural gas when it is processed?
Mercaptan What is added to natural gas when it is processed?
An organic compound added to natural gas What is mercaptan?
It gives it an identifiable odor for safety reasons What benefit does mercaptan give to natural gas?
If gas passes through areas of decayed matter What are 3 reasons that gas odor intensity may be decreased or masked?
Various soil compositions
New pipelines
abnormal operating condition Improper odorization is an ____________________ _.
An under-odorization condition What could a release of gas with no odor detected indicate?
It rises quickly and mixes with air What happens when natural gas is released into the atmosphere?
At ground level Where will propane, gasoline and fuel oil settle?
path of least resistance Natural gas will follow the _______________ _.
Soil conditions What plays a big role in the way gas travels?
Prevents it from traveling upwards and causes it to What does moist soil do to gas?
accumulate underground.
Dry soil What type of soil allows gas to move freely?
It forms a barrier at ground level that does not allow What does frozen soil do to gas?
leaking gas to rise.
Yes; through soft trenches and cracks in foundations Can gas migrate sideways? if so, through what?
No; it can accumulate far from the initial leak. It can Does a gas leak always stay near its source? if not, how does it travel?
travel through sewers and underground duct lines.
It expands What happens to natural gas when it is heated?
It contracts What happens to natural gas when it is cooled?
1 degree Fahrenheit How far will the gas temperature drop for every 14psi reduction in pressure?
