Which of the following locations is not a listed warning-sign placement requirement for CO2 systems?

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Multiple Choice

Which of the following locations is not a listed warning-sign placement requirement for CO2 systems?

Sign placement for CO2 hazard signs is focused on where people will actually encounter the risk and need to recognize the danger before or during an entry, storage, or potential migration of gas. Signs belong at every entrance to a protected space so occupants know there’s a CO2 hazard before entering, inside the room where CO2 is stored to warn workers handling the gas, and along paths where CO2 could migrate toward occupied areas so people are alerted even if the gas moves. Putting a sign on the roof doesn’t meet these practical needs; it’s not an entry point, a storage area, or a likely migration route, and CO2 hazards are most critical at lower levels where the gas tends to accumulate, making a roof sign ineffective.

Sign placement for CO2 hazard signs is focused on where people will actually encounter the risk and need to recognize the danger before or during an entry, storage, or potential migration of gas. Signs belong at every entrance to a protected space so occupants know there’s a CO2 hazard before entering, inside the room where CO2 is stored to warn workers handling the gas, and along paths where CO2 could migrate toward occupied areas so people are alerted even if the gas moves. Putting a sign on the roof doesn’t meet these practical needs; it’s not an entry point, a storage area, or a likely migration route, and CO2 hazards are most critical at lower levels where the gas tends to accumulate, making a roof sign ineffective.

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