CIT Acceptability of Electronic Assemblies

Question 1

According to IPC-A-610, what is considered an acceptable solder joint on a through-hole component?

Accepted Answer

Barrel completely filled with good wetting

Answer

Flat solder with no fill

Answer

Partial barrel fill only on component side

Answer

No solder fillet visible

Question 2

What is a critical factor for determining solder joint acceptability on surface mount components?

Accepted Answer

Fillet shape and proper wetting

Answer

Color of the component

Answer

Location of the PCB logo

Answer

Amount of flux residue

Question 3

Which of the following is considered a defect under IPC-A-610 standards?

Accepted Answer

Exposed unintentional copper

Answer

Slightly off-center silkscreen

Answer

Excess flux residue

Answer

Long solder leads

Question 4

What condition must be met for acceptable component mounting per IPC standards?

Accepted Answer

Component must be mechanically secure and properly aligned

Answer

Component must be at an angle

Answer

Component leads must be hidden

Answer

Solder must cover component body

Question 5

What level of cleanliness is required on finished electronic assemblies per IPC-A-610?

Accepted Answer

Assemblies must be free from all visible contamination

Answer

Light dusting is acceptable

Answer

Only flux residue must be cleaned

Answer

Contaminants are acceptable under coating

Question 6

Which IPC class allows for the highest reliability requirements in electronics manufacturing?

Accepted Answer

Class 3 – High Performance Electronic Products

Answer

Class 1 – General Electronic Products

Answer

Class 2 – Dedicated Service Electronic Products

Answer

Class 4 – Disposable Devices