Technical and Vehicle Safety
Continuous white smoke from the exhaust, combined with the coolant level dropping regularly, most likely indicates:
- ○A blocked air filter
- ✓A failed head gasket allowing coolant into the combustion chamber
- ○Worn piston rings
- ○A faulty catalytic converter
Correct answer
A failed head gasket allowing coolant into the combustion chamber
A blown head gasket lets coolant enter the cylinders; it burns and exits as thick white smoke while the coolant reservoir gradually empties.
This is one sample question. Practise the full bank with timed mock exams, every answer explained, and a predicted pass score — free to start in Theory Test Ireland.
Download on theApp StoreRelated questions
What is the minimum legal tread depth for car tyres in Ireland?Under-inflated tyres are dangerous mainly because they:When should you check your tyre pressures?Is it legal to fit tyres of different size or construction type on the same axle?Over-inflated tyres mainly cause:A tyre with a visible cut or bulge in the sidewall: