27 Questions
Which of the following is a goal of the book mentioned in the text?
Understand the background information about natural gas and its delivery system.
What is the positive side of experiences like gas leaks called?
Post traumatic growth
What is recommended to increase safety and effectiveness when detecting gas?
Pair an inexpensive metal oxide detector with a 4 gas monitor.
Which gas leak response tactic is recommended by the text?
Evacuate civilians as quickly as possible
Which gas component is the single largest contributor in natural gas?
Methane
What is the purpose of a curb box in a residential gas distribution system?
To open or close the flow of gas from the main into the service line
What is the common setup for an indoor meter with an outdoor valve and regulator?
There will not be a curb valve
Which of the following is the correct depth range for burying gas transmission lines in normal soil according to federal regulations?
30" to 36"
What is the typical background level of methane in air?
2 PPM-M
Which type of pipe is typically yellow-clad and sold in 75' coils?
CSST
What is the purpose of bump testing for air monitoring equipment?
To react properly to a known concentration
What is the purpose of the vent in the gas system?
To dump gas outside if the regulator fails
What is the recommended tactical consideration for air monitoring equipment?
Pair your 4 gas monitor with an explosive gas meter
What is the main cause of damage to flex lines in the gas piping system?
Repeated moving and flexing
What is the recommended action when responding to potential or actual lightning strikes?
Ask occupants early on in your size-up and always follow up with your meters
Which of the following is the correct flammable range for natural gas (NG)?
5% to 15% gas in air
What is the vapor density of natural gas (NG) relative to air?
0.57-0.62
What is the minimum amount of gas required to ignite or explode when mixed with air and an ignition source at normal pressures and temperatures?
5% gas in air
What is the purpose of odorizing natural gas (NG)?
To make it readily detectable
Which type of leak is considered the most hazardous and requires immediate repair or continuous action until conditions are no longer hazardous?
Grade 1
What is the purpose of gate stations in a natural gas distribution system?
All of the above
What is the range of pipe diameters for distribution lines or 'mains' in a natural gas distribution system?
2" to 24"
What is the purpose of processing raw gas at a processing plant in a natural gas distribution system?
All of the above
Which organization maintains jurisdiction over the safety of transmission pipelines?
The US Department of Transportation (DOT)
What is the maximum internal pressure at which a pipeline or pipeline segment may be continuously operated called?
Maximum allowable operating pressure (MAOP)
What is the pressure range for low pressure distribution systems?
14" of water column or about 0.5 psi
What materials are used for medium pressure distribution systems?
Steel and select plastic
Test your knowledge on high-pressure distribution systems and valve placement in natural gas distribution. Learn about the purpose of valves, how they control gas flow, and the importance of quickly closing valves in case of pipeline failure. Explore the factors to consider when determining the distance between valves.
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