Which preflight check is performed by the Flight Attendant on the CRJ?

The preflight check that a Flight Attendant performs on the CRJ includes verifying the seat cushions. This is critical because seat cushions serve a dual purpose; they are designed to provide comfort during the flight and can also be used as flotation devices in case of an emergency landing on water. Ensuring that these cushions are in good condition and properly secured is a key safety task for the Flight Attendant, as they could significantly impact passenger safety during an evacuation or emergency situation.

The other options, while essential components of an aircraft's emergency equipment, are not typically within the purview of the Flight Attendant's preflight checks on the CRJ. For example, the supplemental passenger oxygen system is generally checked by the cockpit crew and maintenance personnel to ensure it functions properly when needed. The crash axe is typically secured in the cockpit area and checked by the flight crew. Smoke detectors are also part of the aircraft's safety equipment, but ensuring their operational status is usually handled through technical maintenance and checks rather than direct oversight by cabin crew during preflight preparation.