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Which hazard does glycol brake fluid present to paintwork?

  • A.None
  • B.It softens the lacquer slowly, so that damage appears only if the fluid is left in contact for a long period
  • C.It strips paint on contact
  • D.It stains the paint without damaging it, which may be removed by washing the affected area with clean water

Answer: C

Glycol fluid attacks paint immediately and the damage is permanent, so spills are flushed with water at once. Silicone fluid does not. It is the reason a cloth is placed beneath the master cylinder before topping up. Most errors here come from carrying across a result from a neighbouring case where it does not hold. A symptom that appears under one condition and not another is what narrows the diagnosis quickly. Reading the definition literally, rather than recalling a summary, avoids the usual confusion.

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