Discussion
Consider the following pairs of term and meaning.
Cold cranking amps - cold discharge current rating
Reserve capacity - minutes at 25 amps
Parasitic drain - current with the vehicle off
Sulphation - loss of electrolyte
How many of the pairs given above are correctly matched?
Answer: C
Sulphation is the crystallisation of lead sulphate on the plates, not a loss of electrolyte. The other three definitions are correct. Water loss is a separate condition with a different remedy. Checking which component actually carries the load settles most questions of this kind at once. The order in which the effects act is what decides the outcome, so it is worth establishing first. The shared behaviour explains why these belong together and the differences explain why both exist.
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