Practice question

What is the primary purpose of engine oil in the lubrication system?

  1. To increase fuel octane only
  2. To reduce friction and wear between moving parts (and it also helps cooling)
  3. To replace the need for coolant permanently
  4. To inflate the tyres

Answer: B — To reduce friction and wear between moving parts (and it also helps cooling)

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Practice more: CCEA GCSE MVRUS Practice Questions - CCEA GCSE Motor Vehicle and Road User Studies (2017) (Northern Ireland) Exam →