UL offers field evaluation services for medical devices and laboratory or test and measurement equipment that cannot be assessed in our facilities. Our experienced engineers assess the product in the field to applicable standards for regulatory acceptance.
Jet engines move the airplane forward with a great force that is produced by a tremendous thrust and causes the plane to fly very fast. All jet engines, which are also called gas turbines, work on the same principle. The engine sucks air in at the front with a fan. A compressor raises the pressure of the air. The compressor is made with many blades attached to a shaft. The blades spin at high speed and compress or squeeze the air.
You may know the basics, but do you really know exactly how your car's lubrication system works, where the oil goes and what it's actually oiling? See more pictures of car engines.