Practice question

Spark plugs in a petrol engine are used to:

Inject diesel fuel
Ignite the compressed fuel–air mixture with an electric spark
Cool the radiator
Hold the exhaust silencer on

Answer: B — Ignite the compressed fuel–air mixture with an electric spark

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