At what altitude does the CRJ's cabin altitude warning typically activate?

The cabin altitude warning in the CRJ typically activates when the cabin altitude exceeds 10,000 feet. This alert is crucial for the safety of passengers and crew, as it indicates that the cabin pressure has dropped to a level where supplemental oxygen may be required, particularly if the altitude continues to rise.

Maintaining cabin altitude below 10,000 feet ensures that passengers can breathe comfortably without supplemental oxygen for routine flight operations. However, if the cabin altitude reaches and surpasses this threshold, the warning system is designed to alert the flight crew to take necessary corrective actions to restore proper cabin pressure or provide supplemental oxygen when necessary. This activation is a critical safety feature that helps to prevent a situation where passengers and crew could be exposed to hypoxic conditions due to insufficient cabin pressure.

The other options do not accurately represent when the cabin altitude warning activates, as the warning is specifically tailored to engage at the 10,000-foot mark and above to mitigate risks associated with cabin altitude increases.