Safety and work practicesQuestion 593 of 1506

A worker stands on a floor and may touch a live wire. Which floor surface has a fairly low resistance because of the water and conductive chemicals in it?

  1. Concrete
  2. Asphalt
  3. Dry rubber matting
  4. Dry wood boards
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Correct answer: Concrete

Concrete holds water and electrolytes, while asphalt is oil-based and has much greater resistance.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 3.3: Shock Current Path

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Questions last reviewed: 18 October 2026