Final answer:
A trained ground support equipment operator is responsible for raising the lift platform on a Beta-Freightliner R-12 during aircraft fuel servicing, ensuring adherence to safety protocols and operational guidelines.
Step-by-step explanation:
The person responsible for raising the lift platform on a Beta-Freightliner R-12 when servicing fuel to an aircraft is typically a trained ground support equipment operator. This person must have an understanding of the equipment's operation and safety protocols to ensure a secure and efficient refueling process. Ground personnel are often required to complete specific training programs and hold certifications to operate such fuel servicing equipment and follow strict guidelines outlined by the airline or the airport's ground operations management.