NS.M07.5741 (Prevent Accidental Ignition and Recognize
and React to Generic Abnormal Operating Conditions)
Questions With Complete Solutions
Although the smell of mercaptan can be easily identified, what
other factors can affect persons ability to detect natural gas
odorants? Correct Answers Odors that come from farm and/or
ranch animals, industrial manufacturing buildings, and soil types
and conditions.
Pipe solvents used to manufacture polyethylene pipe can also
affect the smell of odorant.
Depending on the situation, what other actions may you need to
take in an emergency? Correct Answers - Evacuate the
occupants from the affected area in an organized manner
- Make sure occupants and bystanders are moved away from the
area
- Establish and monitor the perimeter of the gas leak
,- Eliminate ignition sources. Notify electric and telephone
companies if services need to be disconnected to eliminate
ignition sources
Depending on the situation, what other actions may you need to
take in an emergency? (Continued...) Correct Answers - If
damage to a facility results in escaping gas, you shall report the
damage, notify the Integration Center (they will make all needed
calls), continue to make the area safe.
- Park motorized equipment at a safe distance and upwind of the
affected area.
Depending on the situation, what other actions may you need to
take in an emergency? (Continued...) Correct Answers - If gas
is detected in the ground, investigate for secondary damage by
re-establishing and monitoring the perimeter of the leakage area.
- Control escaping gas. If the escaping gas has ignited, allow it
to burn until the source can be turned off unless life or property
is in danger.
- If building ventilation is required, call for assistance.
, Explain gas to air mixture. Correct Answers - Lower
Explosive Limit (LEL)
- There is not enough gas to ignite, even if an ignition source is
present.
- This gas to air mixture is called "LEAN."
- Upper Explosive Limit (EUL)
- There is too much gas to ignite, even if an ignition source is
present.
- This gas to air mixture is called "RICH."
How can leaks be caused? Correct Answers - Corrosion
- Damage by outside forces
- Faulty materials
- Earth movement
- Poor workmanship
- Other abnormal operating conditions (AOCs)
How is the possibility of a dangerous static charge increased?
Correct Answers When the surface of the pipe is exposed to the
atmosphere or when purging a new line.
An arc can be produced if a flammable gas-in-air mixture and
static charges are present.
and React to Generic Abnormal Operating Conditions)
Questions With Complete Solutions
Although the smell of mercaptan can be easily identified, what
other factors can affect persons ability to detect natural gas
odorants? Correct Answers Odors that come from farm and/or
ranch animals, industrial manufacturing buildings, and soil types
and conditions.
Pipe solvents used to manufacture polyethylene pipe can also
affect the smell of odorant.
Depending on the situation, what other actions may you need to
take in an emergency? Correct Answers - Evacuate the
occupants from the affected area in an organized manner
- Make sure occupants and bystanders are moved away from the
area
- Establish and monitor the perimeter of the gas leak
,- Eliminate ignition sources. Notify electric and telephone
companies if services need to be disconnected to eliminate
ignition sources
Depending on the situation, what other actions may you need to
take in an emergency? (Continued...) Correct Answers - If
damage to a facility results in escaping gas, you shall report the
damage, notify the Integration Center (they will make all needed
calls), continue to make the area safe.
- Park motorized equipment at a safe distance and upwind of the
affected area.
Depending on the situation, what other actions may you need to
take in an emergency? (Continued...) Correct Answers - If gas
is detected in the ground, investigate for secondary damage by
re-establishing and monitoring the perimeter of the leakage area.
- Control escaping gas. If the escaping gas has ignited, allow it
to burn until the source can be turned off unless life or property
is in danger.
- If building ventilation is required, call for assistance.
, Explain gas to air mixture. Correct Answers - Lower
Explosive Limit (LEL)
- There is not enough gas to ignite, even if an ignition source is
present.
- This gas to air mixture is called "LEAN."
- Upper Explosive Limit (EUL)
- There is too much gas to ignite, even if an ignition source is
present.
- This gas to air mixture is called "RICH."
How can leaks be caused? Correct Answers - Corrosion
- Damage by outside forces
- Faulty materials
- Earth movement
- Poor workmanship
- Other abnormal operating conditions (AOCs)
How is the possibility of a dangerous static charge increased?
Correct Answers When the surface of the pipe is exposed to the
atmosphere or when purging a new line.
An arc can be produced if a flammable gas-in-air mixture and
static charges are present.
