Embraer Regional Jet (ERJ) Systems Practice Test 2025 - Free ERJ Systems Practice Questions and Study Guide

ACMP 1 (Auxiliary Cooling Module Pump 1) is designed to provide hydraulic pressure to specific flight control systems and minimize system degradation during certain operational scenarios. The automatic activation of ACMP 1 on the ground is primarily based on specific conditions regarding thrust settings and flap positions.

When the flaps are extended and thrust is set to TOGA (Takeoff/Go-Around), ACMP 1 activates to ensure enough hydraulic pressure is available for necessary operations, which is crucial during takeoff configurations. Additionally, if the airspeed exceeds 50 knots while the flaps are extended, this condition may also trigger ACMP 1 to ensure efficient transitions and system readiness.

This understanding of hydraulic system behavior on the ground regarding specific flap and power configurations is important for safe and effective aircraft operations. Therefore, the correct answer reflects the conditions under which ACMP 1 ensures proper functioning during key operational phases, highlighting the critical role of hydraulic systems in flight safety and aircraft performance.