PSA Airlines Canadair Regional Jet Systems (PSA-CRJ) Practice Exam

What happens when the Master Caution or Master Warning switch is pressed?

1. It illuminates all warning lights

2. It silences the current alert and arms the system for the next alert

3. It cancels all warnings for the duration of the flight

4. It resets the entire EICAS system

The correct answer is: It silences the current alert and arms the system for the next alert

When the Master Caution or Master Warning switch is pressed, it silences the current alert and arms the system for the next alert. This action is crucial as it allows pilots to acknowledge an existing warning or caution without dismissing the possibility of further alerts that may arise. The purpose of the Master Warning and Caution systems in the cockpit is to alert the flight crew to potential issues that may require attention. Pressing the respective switch does not eliminate the alerts but simply silences them temporarily, making it possible for pilots to focus on managing immediate problems while remaining aware that the systems are still monitoring the aircraft's status. This functionality is key in ensuring that pilots can maintain situational awareness and respond to new warnings as they are presented, thereby enhancing safety and operational effectiveness in the cockpit.