What statement is true when considering bunkering tank volume?

Correct Answer: Option C — Generally, topping-off begins at 90% of tank volume, and filling stops at 95% of tank volume.

To prevent accidental overflow and environmental pollution, bunkering procedures dictate a controlled approach to tank capacity. Topping-off at 90% allows the PIC to monitor the rate of rise closely, while stopping at 95% provides a critical safety margin for thermal expansion and potential surge during the final valve closure.