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l the following picture correctly: ( 20%) Midterm Examination Midterm Examination ? Ⅴ . Translation ( 30%) ? The engine lubrication is mainly conducted by the lubricating oil, which has several functions in the lubricating systems: first of all, the oil forms a protective coating on the metal surface and prevents a metal to metal con tact, thus reducing friction and minimizing water. Secondly, as the oil is fed to the various moving parts of the engine, it absorbs and carries the heat away from the engine parts. Thirdly, as the oil circulates through the moving parts of the engine, it tends to wash off dirt away from the engine parts. Midterm Examination ? Since an internal bustion engine develops little power or torque at low rpm. It must gain speed before it will move the vehicle. However, if a rapid rotating e