PCB Professional Standards & Competencies 3

Question 1

What is the primary purpose of an Engineering Change Order (ECO) in PCB design?

Accepted Answer

To formally document and authorize design changes after release

Answer

An ECO provides a controlled mechanism to document, review, approve, and implement design changes to a released product.

Question 2

Which UL standard is commonly associated with flammability ratings for PCB base materials?

Accepted Answer

UL 94

Answer

UL 94 defines flammability ratings (V-0, V-1, V-2, HB) for plastics including PCB laminate materials.

Question 3

In a professional PCB design workflow, who typically has authority to approve a design for release to manufacturing?

Accepted Answer

A designated approver such as a project engineer or design manager per the company's controlled process

Answer

Controlled release processes require designated approvers with authority defined by company procedure, not unilateral designer action.

Question 4

What information is typically included in a PCB stackup document?

Accepted Answer

Layer order, dielectric thickness, material type, and copper weight per layer

Answer

A stackup document specifies each layer's material, thickness, copper weight, and order to guide the fabricator in building the correct laminate structure.

Question 5

A colleague asks you to skip the peer review step to meet a deadline. The professional response is to:

Accepted Answer

Explain the risk of skipping review and escalate the schedule pressure to management

Answer

Professional ethics require communicating risk honestly and escalating schedule conflicts rather than silently bypassing quality controls.

PCB - Design Practice Test

PCB - Design Practice Test

PCB Professional Standards & Competencies 3