To avoid excessive pressures in the fuel oil filling system during bunkering, you should __________.

Correct Answer: Option B — reduce the loading rate when topping off

Reducing the loading rate during topping off prevents pressure surges, commonly known as water hammer, which can rupture piping or damage tank structures. Maintaining a controlled flow rate ensures the tank vents can adequately handle displaced vapors, preventing over-pressurization of the fuel oil filling system during final stages.