CIT Acceptability of Electronic Assemblies 2

Question 1

According to IPC-A-610, what is the minimum acceptable solder fill in a through-hole barrel for Class 2 assemblies?

Accepted Answer

50%

Answer

IPC-A-610 requires a minimum of 50% barrel fill for Class 2 through-hole solder joints.

Question 2

Which condition describes a through-hole lead that protrudes beyond the maximum allowable length after soldering?

Accepted Answer

Defect condition

Answer

Excessive lead protrusion beyond the maximum specified length is a defect condition per IPC-A-610.

Question 3

A through-hole component's lead is not visible through the solder in the barrel on a Class 3 assembly. This is classified as:

Accepted Answer

Defect

Answer

For Class 3, the component lead must be discernible through the solder; if not visible, it is a defect.

Question 4

What term in IPC-A-610 describes a condition that does not meet the target but still meets the minimum requirements for reliability?

Accepted Answer

Acceptable condition

Answer

An 'acceptable condition' meets minimum performance requirements even if it does not match the ideal target.

Question 5

Per IPC-A-610, which class of product has the most stringent acceptability requirements for electronic assemblies?

Accepted Answer

Class 3

Answer

Class 3 represents high-reliability products with the most stringent requirements under IPC-A-610.

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