Safety equipmentQuestion 57 of 352

What must not touch the ungrounded battery terminals?

  1. Plastic covers
  2. Dry air
  3. Rubber caps
  4. Metal objects
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Correct answer: Metal objects

Metal across the terminals can cause a spark or short. The installation must prevent that.

Source: US Code of Federal Regulations (eCFR), 33 CFR Part 183: Boats and Associated Equipment, § 183.420 Batteries

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Questions last reviewed: 18 October 2026