Engine Repair (A1)第 13 / 120 题
The main function of engine oil, besides lubrication, includes all of the following EXCEPT:
a.Cooling internal components
b.Generating spark for combustion
c.Cleaning and suspending contaminants
d.Sealing between rings and cylinder walls
解析
Engine oil lubricates, cools, cleans, and helps seal the rings, but it plays no role in generating spark. Spark is produced by the ignition system. Detergent and dispersant additives keep contaminants suspended until the filter or an oil change removes them.
免费刷完整 120 道题库 — 无需注册。
同考点相关题目
- Blue smoke from the exhaust under acceleration most often indicates:
- Technician A says timing-chain stretch can retard valve timing and set a camshaft/crankshaft correlation code. Technician B says a stretched timing chain has no effect on engine performance. Who is correct?
- Head bolts that use a torque-to-yield (TTY) design should be:
- A rhythmic knocking noise that is loudest under load and disappears when one cylinder is disabled most likely indicates:
- Coolant is leaking internally and the engine oil appears milky. The MOST likely cause is:
- Before final assembly, plastigage is used to measure: