Correct answer: A. It could damage the catalytic converter.
It is essential that the vehicle’s engine is not over filled with oil as this can permanently damage the catalytic converter, which is part of most vehicles’ exhaust systems and removes up to 75% of the carbon monoxide, nitrogen oxide and hydrocarbons from the vehicle’s exhaust. Damaging this increase exhaust emissions.
This is an official-style question from the Safe and Responsible Driving topic of the Ireland driver theory test (Cat. B). Practise all 804 questions free on iTest.ie — with timed mock exams, automatic mistake tracking and progress sync across devices.
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