Solder Study Guide With Questions And
Answers 100% Verified
What is the definition of an IPC J-STD-001, Class 3 product? - Correct Answer-A Class
3 product requires performance-on-demand, the end-use environment may be
uncommonly harsh and the equipment must function when required.
What is the proper preparation and safe maintenance of the soldering iron? (an all
above answer) - Correct Answer-- The soldering iron should be checked
to ensure the tip is fully inserted and
there is no damage.
- Solder should be applied to the tip when
the iron is not in use to prevent tip
oxidation.
- Ensure iron tip is the correct size for
connection to be soldered.
- Check and verify that the ESD Protection
date on the power supply and the iron has
not expired
DO NOT heat solder above - Correct Answer-850°F - Overheated solder can release
lead fumes
What type of maintenance is required at work stations? - Correct Answer-- Work
surfaces must be uncluttered, organized, & free of Foreign
Object Debris (FOD), such as lead clippings, solder balls, contamination, etc.
When ESD protection is required: - Correct Answer-- Verify ESD labels on benches,
monitors and ionizers.
- Report expired or missing labels immediately.
- Follow all SD requirements.
Electronic Safe Static Work Station (SSWS) & Solder Irons - Correct Answer-Always
check the label to be sure:
- the date is current
- there is a procedure number
- the information is legible
Always Follow Steps In Process Instructions - Correct Answer-Do not go out of
sequence unless specifically documented in the process instructions
, What is the heat bridge technique used during the hand soldering process? - Correct
Answer-- When solder is applied at the junction of the iron tip and the area to be
soldered.
- The heat bridge allows for proper heat transfer to the connection.
What is the most important characteristic of an acceptable solder connection? - Correct
Answer-good wetting
What is the purpose of flux? (an all of the above answer) - Correct Answer-- Flux
contained within the solder core melts at a temperature lower than solder
- Flux removes oxides and other surface film on the work piece
- Flux promotes heat transfer and reduces surface tension
- Flux shall be compatible from a cleaning process standpoint and a chemical
standpoint
Why are stranded wires tinned before use? - Correct Answer-- prevent birdcaging
- reduce oxidation
- make lead forming easier
When is a wire considered birdcaged? - Correct Answer-- there is strand separation
greater than 1
strand diameter
- the strands extend beyond the outside
diameter of the wire insulation
What is the criteria for wicking on stranded wire? - Correct Answer-SHALL NOT extend
to a portion
of the wire that is required to remain FLEXIBLE.
Strand Damage - Correct Answer-SHALL NOT exceed the limits of table 5-1. Strand
damage that does not exceed limits of Table 5-1 is a PROCESS INDICATOR.
Terminal Wraps: when attaching wires to posts - Correct Answer-- Must have sufficient
length to allow at least 1 FIELD REPAIR
What is the minimum insulation clearance when soldering wires to terminals? - Correct
Answer-- Insulation SHALL NOT interfere with the solder connection
- Insulation SHALL NOT be embedded in the solder connection
- Insulation Clearance SHALL NOT permit shorting or violate minimum electrical
clearance
maximum insulation clearance when soldering wires to terminals? - Correct Answer-2
WIRE DIAMETERS including insulation
What is the wrap criteria for turret terminals? - Correct Answer-Minimum wrap: 180° (1/2
wrap)
Answers 100% Verified
What is the definition of an IPC J-STD-001, Class 3 product? - Correct Answer-A Class
3 product requires performance-on-demand, the end-use environment may be
uncommonly harsh and the equipment must function when required.
What is the proper preparation and safe maintenance of the soldering iron? (an all
above answer) - Correct Answer-- The soldering iron should be checked
to ensure the tip is fully inserted and
there is no damage.
- Solder should be applied to the tip when
the iron is not in use to prevent tip
oxidation.
- Ensure iron tip is the correct size for
connection to be soldered.
- Check and verify that the ESD Protection
date on the power supply and the iron has
not expired
DO NOT heat solder above - Correct Answer-850°F - Overheated solder can release
lead fumes
What type of maintenance is required at work stations? - Correct Answer-- Work
surfaces must be uncluttered, organized, & free of Foreign
Object Debris (FOD), such as lead clippings, solder balls, contamination, etc.
When ESD protection is required: - Correct Answer-- Verify ESD labels on benches,
monitors and ionizers.
- Report expired or missing labels immediately.
- Follow all SD requirements.
Electronic Safe Static Work Station (SSWS) & Solder Irons - Correct Answer-Always
check the label to be sure:
- the date is current
- there is a procedure number
- the information is legible
Always Follow Steps In Process Instructions - Correct Answer-Do not go out of
sequence unless specifically documented in the process instructions
, What is the heat bridge technique used during the hand soldering process? - Correct
Answer-- When solder is applied at the junction of the iron tip and the area to be
soldered.
- The heat bridge allows for proper heat transfer to the connection.
What is the most important characteristic of an acceptable solder connection? - Correct
Answer-good wetting
What is the purpose of flux? (an all of the above answer) - Correct Answer-- Flux
contained within the solder core melts at a temperature lower than solder
- Flux removes oxides and other surface film on the work piece
- Flux promotes heat transfer and reduces surface tension
- Flux shall be compatible from a cleaning process standpoint and a chemical
standpoint
Why are stranded wires tinned before use? - Correct Answer-- prevent birdcaging
- reduce oxidation
- make lead forming easier
When is a wire considered birdcaged? - Correct Answer-- there is strand separation
greater than 1
strand diameter
- the strands extend beyond the outside
diameter of the wire insulation
What is the criteria for wicking on stranded wire? - Correct Answer-SHALL NOT extend
to a portion
of the wire that is required to remain FLEXIBLE.
Strand Damage - Correct Answer-SHALL NOT exceed the limits of table 5-1. Strand
damage that does not exceed limits of Table 5-1 is a PROCESS INDICATOR.
Terminal Wraps: when attaching wires to posts - Correct Answer-- Must have sufficient
length to allow at least 1 FIELD REPAIR
What is the minimum insulation clearance when soldering wires to terminals? - Correct
Answer-- Insulation SHALL NOT interfere with the solder connection
- Insulation SHALL NOT be embedded in the solder connection
- Insulation Clearance SHALL NOT permit shorting or violate minimum electrical
clearance
maximum insulation clearance when soldering wires to terminals? - Correct Answer-2
WIRE DIAMETERS including insulation
What is the wrap criteria for turret terminals? - Correct Answer-Minimum wrap: 180° (1/2
wrap)
