Global 6000 Practice Test 2026 - Free Practice Questions and Study Guide

Replenishment is allowed only when outside air temperature is not below a certain minimum, because the equipment and the fluids involved are designed to operate safely within that range. When the outside air is at or above -12°C, the system’s hoses, seals, and pumps stay within their reliable operating conditions and the fluid remains at a workable viscosity, reducing the risk of freezing, ice formation, or hose stiffness that could cause leaks or blockages. If the temperature were colder than -12°C, these risks increase and the replenishment process could fail or become unsafe, so the procedure specifies this minimum.