Correct answer: D. Between 11:30 pm and 7:00 am in a built-up area.
Drivers are not permitted to sound the horn in a built-up area between 11:30 pm and 7:00 am unless there is a traffic emergency. Only sound the horn to warn other road users of oncoming danger or if they need to be made aware of your presence for safety reasons. Sounding the horn does not give the driver an automatic right of way. Never sound the horn to provoke a reaction from or to rebuke another motorist.
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.
Practise the full question bank free →