To further clarify the question it was in a ATPL piston eng/gas turbine exam;
it was something like this " what is the purpose of a flame arrester"
the options where along the lines of; used for when fuel SG increaces due to temp getting colder
and the other 2 options something alongs the lines of pipping to the engine???
Thanks
Pick any of the answers above to explain what pipping is all about
