In the serial number for the stokes litter, which portion is derived from OPFAC?

• A. Last five characters of OPFAC
• B. First five characters of OPFAC
• C. Last four characters of OPFAC
• D. OPFAC is not used

Answer: (A)

The thing being tested is how the OPFAC code is reflected in the serial number. OPFAC is a five-character code that identifies the operating facility, and in the Stokes litter’s serial format that code is appended to the end of the serial. So the portion derived from OPFAC is the last five characters of the serial. This trailing block uniquely ties the item to that specific facility, which is why it’s placed at the end. Placing OPFAC at the beginning or not using OPFAC would lose that clear, unit-level traceability, and using only four characters would not fully represent the five-character code.