Practice question

Piston rings primarily:

  1. Decorate the piston for identification
  2. Seal combustion pressure, control oil, and help transfer heat to the cylinder wall
  3. Connect the gearbox to the wheels
  4. Act as the main bearings of the crankshaft

Answer: B — Seal combustion pressure, control oil, and help transfer heat to the cylinder wall

The correct answer is shown above. Try the full quiz for additional practice.

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