The ARP is used to enter which of the following?

• A. Standby power settings
• B. Reference speeds, MDA, DH, and barometric altimeter
• C. Displays brightness levels
• D. Engine parameters

Answer: (B)

This item tests where you input the critical approach and altitude reference data used by the aircraft. The ARP is the panel where you enter reference speeds (V-speeds), the approach minima (MDA for non-precision or DH for precision approaches), and the barometric altimeter setting (the local QNH). These inputs ensure accurate airspeed targets, correct descent decisions during approach, and proper altitude readings.

Other options fall outside this function: standby power settings relate to electrical systems, displays brightness levels to cockpit lighting, and engine parameters come from engine instrumentation rather than the ARP.