Topic: Vehicle mechanics and maintenance · Nº 65 / 539
Si la presión de los neumáticos es menor que la recomendada, ¿aumenta el consumo de combustible?
If tyre pressure is lower than recommended, does fuel consumption increase?
- ASí, porque aumenta la fricción con la carretera.Yes, because friction with the road increases.
- BSí, y además el desgaste es mayor en el centro de la banda de rodadura.Yes, and the tread also wears more in the centre.
- CNo, si las presiones están compensadas entre todos los neumáticos del vehículo.No, if the pressures are the same in all the vehicle's tyres.
Show answer
Correct answer
- ASí, porque aumenta la fricción con la carretera.Yes, because friction with the road increases.
Explanation
With lower pressure than recommended, the tyre deforms more and its rolling resistance increases, so the engine needs more energy and fuel consumption goes up. The tyre also wears more at the edges, not in the centre, and having all the wheels equally low does not make up for it.
Independent app: not affiliated with or endorsed by the DGT (Spain's Directorate-General for Traffic) or the Ministry of the Interior. The official exam is booked with the DGT and taken at its test centres. The questions here are practice material; the DGT's official question bank is not public.