Practice question

What is the fundamental difference in the method of ignition between a petrol engine and a diesel engine?

  1. Petrol uses compression ignition; diesel uses spark ignition
  2. Petrol uses spark ignition; diesel uses compression ignition
  3. Both use spark plugs to ignite the fuel
  4. Both rely on glow plugs for normal running

Answer: B — Petrol uses spark ignition; diesel uses compression ignition

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