Before working between, under, or at the end of equipment with a locomotive attached the employee on the ground must state via radio the phrase:

• A. "Going in - between ( required I.D. ) ."
• B. "Going out - between ( required I.D. ) ."
• C. "All clear"
• D. "Proceed with caution"

Answer: (A)

The situation tests proper radio communication before entering a hazardous area around equipment with a locomotive attached. The correct call announces that you are entering the space between pieces of equipment and includes your identification. Saying “Going in - between (required I.D.)” signals to the rest of the crew that a ground worker is about to enter the area, specifies the exact location, and provides the required ID for accountability. This ensures the locomotive crew can stop or control movements as needed and confirms the person entering is authorized and recognized.

The other phrases don’t meet this safety protocol: they either imply leaving the area, are too vague, or omit the explicit entry message and the ID requirement, so they wouldn’t reliably establish the necessary safety communication.