Final answer:
The statement about FOB devices being cleaned in-line and vented out the top every three months could refer to 'Foam On Beer' systems in a draft beer setup, which require regular maintenance, though the exact frequency would depend on the manufacturer's guidelines and usage.
Step-by-step explanation:
The statement concerning FOB (Free On Board) devices suggests a maintenance or cleaning process that is in place for specific equipment. If FOB refers to 'Free On Board' in a shipping context, it does not align with the cleaning of devices. However, FOB also stands for 'Foam On Beer' in the draft beer system industry. In this context, FOB devices are indeed maintained to ensure the quality of the beer by preventing excess foam. Regular maintenance is key for these devices, and while the cleaning schedule can vary, venting during cleaning is a common practice to remove excess liquid or cleaner solution from the system.
Without additional context, it's challenging to determine whether the statement is true or false. Typically, maintenance routines, including cleaning and venting FOB devices, are dependent on the manufacturer's recommendations and the usage frequency. Thus, it is plausible that such devices could be cleaned and vented every three months as part of a regular maintenance schedule.