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QuestionsSafe and Responsible Driving › Question 138 of 420

What is the effect on the control of the vehicle if there is a film of water between the vehicle’s tyres and the road surface?

  1. A.Braking only will be less effective.
  2. B.Steering and braking will be more effective.
  3. C.Steering and braking will be less effective.
  4. D.Steering will be more effective.
Show answer & explanation

Correct answer: C. Steering and braking will be less effective.

When driving on a road where there is a lot of surface water, a film of water can build up between the tyres and the road surface. When this occurs it is called aquaplaning, it reduces the grip of the tyres on the road and can result in the total loss of control over the vehicle’s steering and braking.

This is an official-style question from the Safe and Responsible Driving topic of the Ireland driver theory test (Cat. B). Practise all 807 questions free on iTest.ie — with timed mock exams, automatic mistake tracking and progress sync across devices.

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