1
IPC CID extra Questions with Answers (100% Correct
Answers)
What do performance classes reflect? Answer: Progressive increases in
sophistication, functional performance, and frequency/intensity of inspection or
stress testing
What are the three performance classes? Answer: 1-General Electronics 2-
Dedicated Service 3-High reliability
Who is the end user? 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? Answer: The end user
What would be in class 3 performance? Answer: Military, medical, etc.
What is ambient temperature? Answer: The surrounding environment that
comes into contact with your product
What do producibility levels tell us? Answer: Increasing complexity of tooling,
materials, and processing. Yields increase as costs decrease, etc.
What increases with each producibility level? Answer: Sophisitication
What is the zaxis aspect ratio? Answer: Ratio between the nominal thickness of
the board and the smallest drill size.
© 2025 All rights reserved
, 2
What is the most important special consideration in terms of electrical
functionality that a designer must consult the EE? Answer: Special keep out or
keep in areas of the board.
Where should high frequency circuits be placed? Answer: Near the connector
Where should filtering caps be placed? Answer: Near the source of power/gnd
(at the connector)
What is least important to route in analog circuits? Answer: Power and ground
What is a major consideration for component placement? Answer: Will
backwards compatibility be necessary?
What is Ohm's law? Answer: V=IR
What is an important basic rule for a designer of a board? Answer: Terminate
unused logic pins with a pull-down or pull-up resistor.
What product safety testing regards flame retardants? Answer: UL 94
How thick is half ounce copper? Answer: 0.7 mils (17 um thick)
What is the subtractive process? Answer: Unwanted copper is etched away
What is the additive process? Answer: Only wanted copper is added to the
board
© 2025 All rights reserved
IPC CID extra Questions with Answers (100% Correct
Answers)
What do performance classes reflect? Answer: Progressive increases in
sophistication, functional performance, and frequency/intensity of inspection or
stress testing
What are the three performance classes? Answer: 1-General Electronics 2-
Dedicated Service 3-High reliability
Who is the end user? 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? Answer: The end user
What would be in class 3 performance? Answer: Military, medical, etc.
What is ambient temperature? Answer: The surrounding environment that
comes into contact with your product
What do producibility levels tell us? Answer: Increasing complexity of tooling,
materials, and processing. Yields increase as costs decrease, etc.
What increases with each producibility level? Answer: Sophisitication
What is the zaxis aspect ratio? Answer: Ratio between the nominal thickness of
the board and the smallest drill size.
© 2025 All rights reserved
, 2
What is the most important special consideration in terms of electrical
functionality that a designer must consult the EE? Answer: Special keep out or
keep in areas of the board.
Where should high frequency circuits be placed? Answer: Near the connector
Where should filtering caps be placed? Answer: Near the source of power/gnd
(at the connector)
What is least important to route in analog circuits? Answer: Power and ground
What is a major consideration for component placement? Answer: Will
backwards compatibility be necessary?
What is Ohm's law? Answer: V=IR
What is an important basic rule for a designer of a board? Answer: Terminate
unused logic pins with a pull-down or pull-up resistor.
What product safety testing regards flame retardants? Answer: UL 94
How thick is half ounce copper? Answer: 0.7 mils (17 um thick)
What is the subtractive process? Answer: Unwanted copper is etched away
What is the additive process? Answer: Only wanted copper is added to the
board
© 2025 All rights reserved
