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Which component is often replaceable separately on a starter?

  • A.The commutator
  • B.The reduction gear set, which wears in service and is available separately from the manufacturer of the starter
  • C.The solenoid
  • D.The armature, which is supplied as a service part and may be exchanged without disturbing the field assembly

Answer: C

Solenoids are commonly available separately because contact erosion is a frequent failure. Brushes and bushes are the other common service parts. Armatures and gear sets are genuinely available for some heavy duty units, which makes those options partly real. Reading the definition literally, rather than recalling a summary, avoids the usual confusion. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision.

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