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Your lorry has a coolant expansion tank marked MIN and MAX. Under the manufacturer’s specified checking conditions, how should you check its level?

Correct answer

Check that it is between MIN and MAX.

Periodically check that the level is between MIN and MAX, following the manufacturer’s procedure. Do not fill the tank to overflowing or wait for an abnormal temperature rise before checking. Do not open a hot pressurised system: allow the engine to cool when required by the procedure. If topping up is needed, use the specified coolant and investigate leaks or repeated level drops.

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  • Check that it is between MIN and MAX.

  • Check that the tank is overflowing.

  • Check it only when the engine becomes abnormally hot.

The real exam in English is a translation of the Spanish original; compare both here.

Show the Spanish original

Su camión tiene un vaso de expansión del refrigerante con marcas MIN y MAX. En las condiciones de comprobación indicadas por el fabricante, ¿cómo debe revisar su nivel?

  1. Compruebe que el depósito esté rebosando.
  2. Compruebe que se encuentre entre MIN y MAX.(Correct answer)
  3. Revíselo solo cuando el motor se caliente anormalmente.

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