IPC CID questions and answers 2026\2027 A+ Grade
What do performance classes reflect?
- correct answer Progressive increases in sophistication, functional performance, and
frequency/intensity of inspection or stress testing
What are the three performance classes?
- correct answer 1-General Electronics 2-Dedicated Service 3-High reliability
Who is the end user?
- correct answer 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?
- correct answer The end user
What would be in class 3 performance?
- correct answer Military, medical, etc.
What is ambient temperature?
- correct answer The surrounding environment that comes into contact with your product
What do producibility levels tell us?
- correct answer Increasing complexity of tooling, materials, and processing. Yields increase as costs
decrease, etc.
What increases with each producibility level?
- correct answer Sophisitication
What is the zaxis aspect ratio?
- correct answer Ratio between the nominal thickness of the board and the smallest drill size.
, What is the most important special consideration in terms of electrical functionality that a designer
must consult the EE?
- correct answer Special keep out or keep in areas of the board.
Where should high frequency circuits be placed?
- correct answer NEar the connector
Where should filtering caps be placed?
- correct answer Near the source of power/gnd (at the connector)
What is least important to route in analog circuits?
- correct answer Power and ground
What is a major consideration for component placement?
- correct answer Will backwards compatibility be necessary?
What is Ohm's law?
- correct answer V=IR
What is an important basic rule for a designer of a board?
- correct answer Terminate unused logic pins with a pull-down or pull-up resistor.
What product safety testing regards flame retardants?
- correct answer UL 94
How thick is half ounce copper?
- correct answer 0.7 mils (17 um thick)
What is the subtractive process?
- correct answer Unwanted copper is etched away
What do performance classes reflect?
- correct answer Progressive increases in sophistication, functional performance, and
frequency/intensity of inspection or stress testing
What are the three performance classes?
- correct answer 1-General Electronics 2-Dedicated Service 3-High reliability
Who is the end user?
- correct answer 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?
- correct answer The end user
What would be in class 3 performance?
- correct answer Military, medical, etc.
What is ambient temperature?
- correct answer The surrounding environment that comes into contact with your product
What do producibility levels tell us?
- correct answer Increasing complexity of tooling, materials, and processing. Yields increase as costs
decrease, etc.
What increases with each producibility level?
- correct answer Sophisitication
What is the zaxis aspect ratio?
- correct answer Ratio between the nominal thickness of the board and the smallest drill size.
, What is the most important special consideration in terms of electrical functionality that a designer
must consult the EE?
- correct answer Special keep out or keep in areas of the board.
Where should high frequency circuits be placed?
- correct answer NEar the connector
Where should filtering caps be placed?
- correct answer Near the source of power/gnd (at the connector)
What is least important to route in analog circuits?
- correct answer Power and ground
What is a major consideration for component placement?
- correct answer Will backwards compatibility be necessary?
What is Ohm's law?
- correct answer V=IR
What is an important basic rule for a designer of a board?
- correct answer Terminate unused logic pins with a pull-down or pull-up resistor.
What product safety testing regards flame retardants?
- correct answer UL 94
How thick is half ounce copper?
- correct answer 0.7 mils (17 um thick)
What is the subtractive process?
- correct answer Unwanted copper is etched away
