Edema has many possible causes: 1  Prolonged standing or sitting, especially in hot weather, can cause excess fluid to accumulate in the feet, ankles and lower legs. 2  Tiny valves inside the veins of the legs can become weakened, causing a common problem called venous insufficiency.
Cars with nitrous-equipped engines can be identified by the purge of the delivery system that most drivers perform prior to reaching the starting line. A separate electrically operated valve is used to release air and gaseous nitrous oxide trapped in the delivery system.
Keep in mind, however, that while nitrous itself is not flammable, if there's a least hint of fuel in the intake, it will ignite, and the heat will cause the nitrous to break down and release a rush of oxygen to the fire, which causes an explosive flash.YTH: Nitrous is Flammable Basically nitrous oxide by itself is pretty innocuous â it really doesn't do anything. In the form of nitrous oxide it is not dangerous or flammable â it just serves as an oxidizer in a racing application.