EE569 IPC Test Questions – 2025/2026 Updated Exam Prep &
Study Guide | 100% Pass Guarantee
The two functions of a solder connection are - correct answerMechanical and electrical
connection
An imperfect solder joint may result in - correct answerElectrical failure
Keeping your workstation clean means you can - correct answerAvoid contamination of
the assembly
ESD damage can be controlled by - correct answerProper grounding
The primary reason not to eat or drink at your workstation is to avoid - correct
answerIngesting lead
A pointed soldering iron tip should be used - correct answerFor small connections
When a solder joint is heated for more than 3 seconds - correct answerThere may be
heat damage to the base material and plated barrel
The main advantages of 63/37 eutectic solder are - correct answerIt melts at lower
temperature and solidifies faster
It's important to remove certain types of fluxes after hand soldering because - correct
answerSticky residues can hold electrically conductive contaminants and cause metal
corrosion
Solder wetting is defined as - correct answerA smooth, unbroken film of solder,
feathered onto base metals
The reason it is important to use the correct solder wire diameter is - correct answerFor
control of speed and amount of solder
The reason for tinning the soldering iron tip is to - correct answerTransfer heat rapidly
When the soldering iron contacts the cleaning sponge for too long - correct answerThe
tip may cool down too much and may affect the formation of a proper solder joint
Using excessive pressure when soldering can cause - correct answerAll of the above
We solder on the termination side of the board - away from the components - correct
answerTo prevent heat damage to the components
, Preheating - correct answerSpeeds up the soldering process to help prevent heat
damage to the assembly
It's important to remove the flux residue right after the soldering operation because -
correct answerIt can harden and become difficult to remove
If you think components may be sensitive to cleaning fluids, you should - correct
answerAsk about your company specific policy if you have any questions
An ideal solder joint has - correct answerA concave fillet, complete solder coverage,
smooth texture, wetting that feathers smoothly onto metals, and the outline of the lead
visible
Class 3 requirements in the J-Standard 001 are for - correct answerHigh reliability
electronics - where failure is not an option
A cold solder joint - correct answerLooks dull and grainy, and is poorly wetted
A solder bridge is - correct answerAn unwanted solder connection between two or more
conductive features
A disturbed solder joint is caused by - correct answerMovements of the solder joint after
the soldering iron is removed, but before the solder is cool enough to harden
It is important to control static electricity at your workstation in order to - correct
answerAvoid damage to components
We use solder flux to - correct answerAll of the above
You should tin the tip of your soldering iron - correct answerBoth "A and "C"
When you expect your soldering iron to sit (or idle) for a while, it is important to - correct
answerTin the tip with solder to prevent oxidation
Melting a little solder on the tip - before moving the solder wire to the other side - results
in - correct answerThe formation of a heat bridge to transfer heat faster
Re-melting a solder joint without using flux usually results in - correct answerThe texture
of the solder becomes grainy, and weakening the strength of the connection
The maximum preferred solder contact angle is - correct answer90 degrees or less
What is an IPC standard? - correct answerAn evolving set of rules that the electronics
industry follows to develop safe, reliable and quality products
Study Guide | 100% Pass Guarantee
The two functions of a solder connection are - correct answerMechanical and electrical
connection
An imperfect solder joint may result in - correct answerElectrical failure
Keeping your workstation clean means you can - correct answerAvoid contamination of
the assembly
ESD damage can be controlled by - correct answerProper grounding
The primary reason not to eat or drink at your workstation is to avoid - correct
answerIngesting lead
A pointed soldering iron tip should be used - correct answerFor small connections
When a solder joint is heated for more than 3 seconds - correct answerThere may be
heat damage to the base material and plated barrel
The main advantages of 63/37 eutectic solder are - correct answerIt melts at lower
temperature and solidifies faster
It's important to remove certain types of fluxes after hand soldering because - correct
answerSticky residues can hold electrically conductive contaminants and cause metal
corrosion
Solder wetting is defined as - correct answerA smooth, unbroken film of solder,
feathered onto base metals
The reason it is important to use the correct solder wire diameter is - correct answerFor
control of speed and amount of solder
The reason for tinning the soldering iron tip is to - correct answerTransfer heat rapidly
When the soldering iron contacts the cleaning sponge for too long - correct answerThe
tip may cool down too much and may affect the formation of a proper solder joint
Using excessive pressure when soldering can cause - correct answerAll of the above
We solder on the termination side of the board - away from the components - correct
answerTo prevent heat damage to the components
, Preheating - correct answerSpeeds up the soldering process to help prevent heat
damage to the assembly
It's important to remove the flux residue right after the soldering operation because -
correct answerIt can harden and become difficult to remove
If you think components may be sensitive to cleaning fluids, you should - correct
answerAsk about your company specific policy if you have any questions
An ideal solder joint has - correct answerA concave fillet, complete solder coverage,
smooth texture, wetting that feathers smoothly onto metals, and the outline of the lead
visible
Class 3 requirements in the J-Standard 001 are for - correct answerHigh reliability
electronics - where failure is not an option
A cold solder joint - correct answerLooks dull and grainy, and is poorly wetted
A solder bridge is - correct answerAn unwanted solder connection between two or more
conductive features
A disturbed solder joint is caused by - correct answerMovements of the solder joint after
the soldering iron is removed, but before the solder is cool enough to harden
It is important to control static electricity at your workstation in order to - correct
answerAvoid damage to components
We use solder flux to - correct answerAll of the above
You should tin the tip of your soldering iron - correct answerBoth "A and "C"
When you expect your soldering iron to sit (or idle) for a while, it is important to - correct
answerTin the tip with solder to prevent oxidation
Melting a little solder on the tip - before moving the solder wire to the other side - results
in - correct answerThe formation of a heat bridge to transfer heat faster
Re-melting a solder joint without using flux usually results in - correct answerThe texture
of the solder becomes grainy, and weakening the strength of the connection
The maximum preferred solder contact angle is - correct answer90 degrees or less
What is an IPC standard? - correct answerAn evolving set of rules that the electronics
industry follows to develop safe, reliable and quality products
