Which of the following is a valid ESD safety precaution?

Question

Options

• AYou should place ESD-sensitive circuits on top of metal work surfaces.
• BKeep ion generators away from circuit board or assembly containing ESD-sensitive circuits.
• CDo not wear polyester clothing while working on ESD sensitive components.
• DAlways handle logic board by grasping the heat sinks.

• A
  3% (1)
• B
  7% (2)
• C
  86% (25)
• D
  3% (1)

Explanation

Polyester and other synthetic fabrics are notorious for generating static electricity through triboelectric charging (friction between fabric and skin/surfaces), making them a significant ESD hazard - so avoiding polyester clothing is a genuine and well-established precaution. Option A is wrong because metal work surfaces can conduct static charges directly into sensitive components; ESD-safe mats or grounded surfaces should be used instead. Option B is wrong because ion generators (ionizers) are actually used in ESD-sensitive environments to neutralize static charges - keeping them away defeats their purpose. Option D is wrong because handling a logic board by its heat sinks doesn't protect against ESD; you should handle boards by their edges and always while grounded via a wrist strap.

Memory tip: Think "natural fabrics, natural safety" - cotton and other natural fibers don't build up static like synthetics do, so dressing naturally is the safe choice in an ESD-sensitive environment.

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