Question

before handling printed circuit boards, technicians should discharge any static electricity from their bodies by:
select one:
a. momentarily grabbing both ends of the power source to neutralize themselves.

b. touching a grounded metal frame.

c. wiping their hands with a silk rag to remove excess electrons from their hands.

d. rubbing their feet several times on the carpet to remove excess electrons.

Explanation:

To discharge static electricity, grounding is a common method. Touching a grounded metal frame (Option B) allows static charge to flow to the ground. Option A is incorrect as grabbing power source ends is dangerous and not for static discharge. Option C: silk is an insulator, wiping with it won't discharge. Option D: rubbing on carpet would generate static, not discharge. So B is correct.

Answer:

B. Touching a grounded metal frame.