Which THREE of the following items are appropriate to use for ESD prevention?

Question

Options

• AMetal work surface
• BPower supply discharge tool
• CGrounded work mat
• DWrist strap and cord
• EWireless wrist strap
• FStatic-shielding bags

• A
  9% (2)
• C
  86% (19)
• E
  5% (1)

Explanation

Grounded work mats (C), wrist straps with cords (D), and static-shielding bags (F) are the three correct ESD prevention tools because each provides a verified path to ground or a physical barrier that neutralizes static charge - the fundamental requirements for ESD protection.

Why the distractors are wrong:

• A (Metal work surface): Metal conducts electricity but is not inherently grounded, making it a potential source of discharge rather than a preventive measure.
• B (Power supply discharge tool): This is used to safely drain stored charge from capacitors in power supplies - a safety tool, not an ESD prevention tool for component handling.
• E (Wireless wrist strap): Without a physical ground cord, a wireless wrist strap provides no actual ESD protection; it cannot dissipate static charge. These are essentially placebo devices and are not CompTIA-approved for ESD prevention.

Memory tip: Remember the acronym G-G-S - Ground yourself (wrist strap + cord), Ground your surface (work mat), Shield your parts (static bags). If it doesn't connect to ground or create a barrier, it doesn't count.

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