Correct answer
increases, since there is greater rolling resistance.
It increases because rolling resistance is greater. Pressure below that specified for the vehicle and load also promotes tyre heating and wear and can compromise safety. Check pressures when cold and adjust them to the manufacturer’s specifications; do not reduce pressure to save fuel or prevent a blowout.
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does not vary.
increases, since there is greater rolling resistance.
decreases and, in addition, helps avoid the possibility of a blowout.
The real exam in English is a translation of the Spanish original; compare both here.
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Si la presión de los neumáticos del conjunto de vehículos que conduce es demasiado baja, el consumo de carburante...
- no varía.
- aumenta, ya que hay una mayor resistencia a la rodadura.(Correct answer)
- disminuye y, además, ayuda a evitar la posibilidad de un reventón.
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