Each pressure gage used in an oil transfer operation must be accurate to within what percent?

Correct Answer: Option D — 10 percent

In accordance with 33 CFR 154.525, pressure gauges utilized during oil transfer operations must maintain an accuracy within 10 percent. This regulatory standard ensures that the equipment provides sufficiently reliable data to the Person-in-Charge to prevent over-pressurization of hoses or piping systems during the transfer of bulk oil.