CIS CIS ESD Control & Protection 2

Question 1

What is the Human Body Model (HBM) used for in ESD testing?

Accepted Answer

Simulating ESD events from a charged person touching a component

Answer

The Human Body Model simulates an ESD event when a charged person (modeled as a 100 pF capacitor discharged through 1.5 kΩ) touches an electronic component.

Question 2

What color are most standard ESD protective bags and packaging materials?

Accepted Answer

Pink or metallic shielding (silver/gray)

Answer

ESD-protective packaging is typically pink (for dissipative poly bags) or metallic silver/gray (for shielding bags that protect against electrostatic fields).

Question 3

What is the maximum acceptable voltage threshold for an ESD wrist strap continuous monitor alarm (upper limit)?

Accepted Answer

250V

Answer

Most ESD wrist strap continuous monitors alarm when the operator's body voltage exceeds 250V, signaling a grounding failure.

Question 4

Which ESD model most closely simulates the discharge from a metal tool or conductive object touching a component pin?

Accepted Answer

Machine Model (MM)

Answer

The Machine Model (MM) simulates discharge from metal objects like tools, fixtures, or automated handling equipment contacting a component.

Question 5

What does an ionizer (air ionizer) do in an ESD control program?

Accepted Answer

Neutralizes static charges on insulative surfaces and isolated conductors that cannot be grounded

Answer

An ionizer produces positive and negative ions that neutralize static charges on surfaces that cannot be directly grounded, such as plastic parts or component bodies.

(CIS) Certified IPC Specialist Practice Test

(CIS) Certified IPC Specialist Practice Test

CIS CIS ESD Control & Protection 2