PCB Regulatory Frameworks & Compliance 2

Question 1

Under IPC-2221, what is the minimum electrical clearance required between uncoated conductors at 101–300V DC on the external layer of a Class 3 board?

Accepted Answer

1.25 mm

Answer

IPC-2221 Table 6-1 specifies 1.25 mm minimum clearance for external conductors at 101–300V in non-coated Class 3 applications.

Question 2

Which EU directive specifically governs the restriction of hazardous substances like lead and cadmium in electronic equipment?

Accepted Answer

RoHS

Answer

The RoHS Directive (2011/65/EU) restricts the use of lead, cadmium, mercury, and other hazardous substances in electrical and electronic equipment.

Question 3

A PCB intended for aerospace avionics must comply with which IPC standard for high-reliability rigid boards?

Accepted Answer

IPC-6012

Answer

IPC-6012 is the qualification and performance specification for rigid printed boards, with Class 3A addendum covering aerospace/military requirements.

Question 4

What does the FCC Part 15 regulation primarily address for PCB designers?

Accepted Answer

Unintentional electromagnetic emissions from digital devices

Answer

FCC Part 15 sets limits on unintentional radio frequency emissions from digital devices to prevent interference with licensed radio services.

Question 5

Which IPC standard defines the acceptability criteria for solder joints on surface mount components?

Accepted Answer

IPC-A-610

Answer

IPC-A-610 (Acceptability of Electronic Assemblies) defines visual and workmanship criteria for solder joints including SMT components.

PCB - Design Practice Test

PCB - Design Practice Test

PCB Regulatory Frameworks & Compliance 2