Correct answer
The cooling-system thermostat.
The thermostat. If stuck open, it allows coolant to flow to the radiator while the engine is still cold and can delay warm-up. This is not the only possible cause: the rest of the system, such as a continuously running fan, should also be checked according to the manufacturer’s instructions.
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The cooling-system thermostat.
The brake-light switch.
The switch that senses oil pressure.
The real exam in English is a translation of the Spanish original; compare both here.
Show the Spanish original
Si el motor de su camión tarda demasiado en alcanzar la temperatura normal de funcionamiento, ¿qué elemento conviene revisar?
- El termostato del circuito de refrigeración.(Correct answer)
- El manocontacto que detecta la presión del aceite.
- El interruptor de las luces de freno.
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