Correct answer: A. Braking and cornering are impaired.
Incorrect tyre pressure adversely affects many of a vehicle’s systems, including suspension, steering and fuel consumption. In particular, under-inflated tyres can affect the vehicle’s braking ability and its effectiveness when cornering. Tyres should always be inflated according to the vehicle manufacturer’s guidelines, information on which can be found in the vehicle handbook.
This is an official-style question from the Technical Matters 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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