IPC CID EXAM 2025 QUESTIONS
AND ANSWERS 100% PASS
What do performance classes reflect? - ✔✔Progressive increases in sophistication,
functional performance, and frequency/intensity of inspection or stress testing
What are the three performance classes? - ✔✔1-General Electronics 2-Dedicated Service
3-High reliability
Who is the end user? - ✔✔The end user is the individual or agency that contracts the
printed board or assembly to be designed and manufactured
Who determines the class of a product? - ✔✔The end user
What would be in class 3 performance? - ✔✔Military, medical, etc.
What is ambient temperature? - ✔✔The surrounding environment that comes into
contact with your product
What do producibility levels tell us? - ✔✔Increasing complexity of tooling, materials,
and processing. Yields increase as costs decrease, etc.
What increases with each producibility level? - ✔✔Sophisitication
What is the zaxis aspect ratio? - ✔✔Ratio between the nominal thickness of the board
and the smallest drill size.
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, What is the most important special consideration in terms of electrical functionality that
a designer must consult the EE? - ✔✔Special keep out or keep in areas of the board.
Where should high frequency circuits be placed? - ✔✔NEar the connector
Where should filtering caps be placed? - ✔✔Near the source of power/gnd (at the
connector)
What is least important to route in analog circuits? - ✔✔Power and ground
What is a major consideration for component placement? - ✔✔Will backwards
compatibility be necessary?
What is Ohm's law? - ✔✔V=IR
What is an important basic rule for a designer of a board? - ✔✔Terminate unused logic
pins with a pull-down or pull-up resistor.
What product safety testing regards flame retardants? - ✔✔UL 94
How thick is half ounce copper? - ✔✔0.7 mils (17 um thick)
What is the subtractive process? - ✔✔Unwanted copper is etched away
What is the additive process? - ✔✔Only wanted copper is added to the board
What must happen immediately after drilling the holes in the boards? - ✔✔Hole
deburring
What is an unsupported hole? - ✔✔A hole in the printed board that does not contain
plating or other conductive reinforcement
What is a supported hole? - ✔✔A hole that has the inside surfaces plated or otherwise
reinforced
COPYRIGHT © 2025 BY GRACE AMELIA, ALL RIGHTS RESERVED 2
AND ANSWERS 100% PASS
What do performance classes reflect? - ✔✔Progressive increases in sophistication,
functional performance, and frequency/intensity of inspection or stress testing
What are the three performance classes? - ✔✔1-General Electronics 2-Dedicated Service
3-High reliability
Who is the end user? - ✔✔The end user is the individual or agency that contracts the
printed board or assembly to be designed and manufactured
Who determines the class of a product? - ✔✔The end user
What would be in class 3 performance? - ✔✔Military, medical, etc.
What is ambient temperature? - ✔✔The surrounding environment that comes into
contact with your product
What do producibility levels tell us? - ✔✔Increasing complexity of tooling, materials,
and processing. Yields increase as costs decrease, etc.
What increases with each producibility level? - ✔✔Sophisitication
What is the zaxis aspect ratio? - ✔✔Ratio between the nominal thickness of the board
and the smallest drill size.
COPYRIGHT © 2025 BY GRACE AMELIA, ALL RIGHTS RESERVED 1
, What is the most important special consideration in terms of electrical functionality that
a designer must consult the EE? - ✔✔Special keep out or keep in areas of the board.
Where should high frequency circuits be placed? - ✔✔NEar the connector
Where should filtering caps be placed? - ✔✔Near the source of power/gnd (at the
connector)
What is least important to route in analog circuits? - ✔✔Power and ground
What is a major consideration for component placement? - ✔✔Will backwards
compatibility be necessary?
What is Ohm's law? - ✔✔V=IR
What is an important basic rule for a designer of a board? - ✔✔Terminate unused logic
pins with a pull-down or pull-up resistor.
What product safety testing regards flame retardants? - ✔✔UL 94
How thick is half ounce copper? - ✔✔0.7 mils (17 um thick)
What is the subtractive process? - ✔✔Unwanted copper is etched away
What is the additive process? - ✔✔Only wanted copper is added to the board
What must happen immediately after drilling the holes in the boards? - ✔✔Hole
deburring
What is an unsupported hole? - ✔✔A hole in the printed board that does not contain
plating or other conductive reinforcement
What is a supported hole? - ✔✔A hole that has the inside surfaces plated or otherwise
reinforced
COPYRIGHT © 2025 BY GRACE AMELIA, ALL RIGHTS RESERVED 2
