Which PSU indicator is listed in the equipment indicators?

• A. Reading light for each seat
• B. NO SMOKING and WIFI indicators
• C. Air vent
• D. Loudspeaker

Answer: (B)

Indicators are signals that convey the current status of a system to passengers or crew. On a Passenger Service Unit, the signs that light up to communicate a condition are the NO SMOKING sign and the WIFI indicator. These show whether smoking is prohibited and whether Wi‑Fi service is available or active. In contrast, a reading light, an air vent, or a loudspeaker are physical components or controls, not status signals. So the combination that represents equipment indicators is NO SMOKING and WIFI indicators.