Questions on using air pressure to clean electronic gear and the general descriptions of motors as "farm related" or "farm duty" based on some particular sets of standards are answered. Some problems arise that aren't so important with rotating machines. The fast-moving air stream can put static electricity charges on the air hose and nozzle. Another is the introduction of moisture unless the air is completely dry. Although vacuuming is theoretically better than pressure for cleaning, the only real solution is either to provide a clean environment or an enclosure that excludes dust. Many variations exist, but they are not based on any overall standard. "Farm rated" simply means the manufacturer offers certain features considered appropriate for some agricultural use.