PCB Quality Control & Assurance 2

Question 1

What does AOI stand for in PCB manufacturing quality control?

Accepted Answer

Automated Optical Inspection

Answer

AOI (Automated Optical Inspection) uses cameras and image processing to detect surface defects on PCBs without electrical testing.

Question 2

Which IPC standard specifically governs acceptability of printed circuit board assemblies?

Accepted Answer

IPC-A-610

Answer

IPC-A-610 'Acceptability of Electronic Assemblies' is the most widely used electronics assembly acceptance standard in the industry.

Question 3

In IPC classification, a Class 3 PCB is intended for which application?

Accepted Answer

High-reliability military and life-support systems

Answer

IPC Class 3 designates high-reliability products where failure cannot be tolerated, such as military, aerospace, and life-support equipment.

Question 4

What is the purpose of a first article inspection (FAI) in PCB production?

Accepted Answer

To inspect only the first board of each production run for conformance

Answer

FAI verifies that the first produced unit from a new setup meets all design and specification requirements before full production proceeds.

Question 5

Measles or crazing on a PCB laminate most commonly indicates which condition?

Accepted Answer

Mechanical stress or thermal shock causing fiber separation

Answer

Measles (crazing) appear as white spots within the laminate where glass fibers have separated from the resin due to mechanical or thermal stress.

PCB - Design Practice Test