Correct answer
Are properly connected and secured
Connections between the towing vehicle and trailer are essential for lighting and any braking systems involved. They must be properly coupled before driving.
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Are properly connected and secured
May be left disconnected on short trips
Are checked only when a lamp fails
The real exam in English is a translation of the Spanish original; compare both here.
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En un conjunto D+E, antes de salir debe comprobarse que las conexiones eléctricas y, en su caso, neumaticas:
- Pueden dejarse sin conectar en trayectos cortos
- Solo se revisan cuando falla una luz
- Están bien conectadas y aseguradas(Correct answer)
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