Correct answer
In series, positive of one battery to negative of the other.
A series connection: join the positive terminal of one battery to the negative of the other; the two free terminals provide nominal 24 V. This is not a parallel connection, which retains 12 V. This describes the circuit arrangement, not jump-starting a vehicle with a discharged battery: jump-starting requires matching voltage and manufacturer procedures.
Full explanation free, no sign-up.
Practice more C1 licence questions
A self-check with exam-style questions on Mechanics and maintenance. Free, no signup.
All options
In parallel, positive to positive and negative to negative.
With one 12 V battery and no voltage-raising equipment.
In series, positive of one battery to negative of the other.
The real exam in English is a translation of the Spanish original; compare both here.
Show the Spanish original
En el circuito de un camión se necesitan 24 V nominales y se dispone de dos baterías compatibles de 12 V. ¿Qué conexión permite sumar sus tensiones?
- En paralelo, positivo con positivo y negativo con negativo.
- Con una sola batería de 12 V sin ningún equipo que eleve la tensión.
- En serie, positivo de una batería con negativo de la otra.(Correct answer)
Editorial status: editorially approved. This status does not certify legal review. Report a correction
Keep studying
Related questions
- What benefit is supported by keeping lorry tyres at the recommended cold pressure for their load?
- A driver without specialist training should leave replacement of certain lamps to a workshop because of high-voltage risk. Which lamps does this precaution concern?
- In a hydraulic braking system, the pedal feels spongy and temporarily improves after repeated applications. Which of these may be a cause in the hydraulic circuit?
- In a cooling circuit designed to operate under pressure, what effect does increased pressure have on the boiling temperature of the same coolant?
- When overtaking a car with a lorry, what safe lateral separation must be left?
- Before driving a truck, which option includes checks of its safety systems rather than only fuel or cleanliness?