IPC A 610 EXAM LATEST ACTUAL EXAM QUESTIONS
AND CORRECT DETAILED ANSWERS WITH RATIONALE
GRADED A+ 2023-2024 PASS
The reason it is important to use the correct solder wire diameter is - For control of
speed and amount of solder
The reason for tinning the soldering iron tip is to - Transfer heat rapidly
When the soldering iron contacts the cleaning sponge for too long - The tip may cool
down too much and may affect the formation of a proper solder joint
Using excessive pressure when soldering can cause - All of the above
We solder on the termination side of the board - away from the components - To
prevent heat damage to the components
Preheating - Speeds 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 - It
can harden and become difficult to remove
If you think components may be sensitive to cleaning fluids, you should - Ask about your
company specific policy if you have any questions
An ideal solder joint has - A 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 - High reliability electronics - where
failure is not an option
A cold solder joint - Looks dull and grainy, and is poorly wetted
A solder bridge is - An unwanted solder connection between two or more conductive
features
The two functions of a solder connection are - Mechanical and electrical connection
An imperfect solder joint may result in - Electrical failure
, Keeping your workstation clean means you can - Avoid contamination of the assembly
ESD damage can be controlled by - Proper grounding
The primary reason not to eat or drink at your workstation is to avoid - Ingesting lead
A pointed soldering iron tip should be used - For small connections
When a solder joint is heated for more than 3 seconds - There may be heat damage to
the base material and plated barrel
The main advantages of 63/37 eutectic solder are - It melts at lower temperature and
solidifies faster
It's important to remove certain types of fluxes after hand soldering because - Sticky
residues can hold electrically conductive contaminants and cause metal corrosion
Solder wetting is defined as - A smooth, unbroken film of solder, feathered onto base
metals
A disturbed solder joint is caused by - Movements 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 - Avoid damage
to components
We use solder flux to - All of the above
You should tin the tip of your soldering iron - Both "A and "C"
When you expect your soldering iron to sit (or idle) for a while, it is important to - Tin 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 - The formation of a heat bridge to transfer heat faster
Re-melting a solder joint without using flux usually results in - The texture of the solder
becomes grainy, and weakening the strength of the connection
The maximum preferred solder contact angle is - 90 degrees or less
What is an IPC standard? - An evolving set of rules that the electronics industry follows
to develop safe, reliable and quality products
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