The following question is one that was provided by designers for
the A basic level exam. It is NOT included in the final
published test and is for reference only. The topic is Hole
Requirements.
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111 What is the main consideration in the standard
fabrication allowance?
A. process variation
B. hole tolerance capability
C. aspect ratio characteristics
D. minimum annular ring requirements
select the most correct answer
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Previous QOD
110 Given a maximum through-hole component lead
diameter of 0.5 mm [.020"], what is the minimum
finished plated through hole size that should be
used?
B. 0.65 mm [.026"]
Resource: IPC-T-50 Specific Terms and IPC-D-275 para 5.4.8;
figure 5-26; table 5-15.
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Please send comments, constructive critique, or suggestions to
Lisa Williams at [log in to unmask]
Dieter Bergman