IPC A 610 Practice Test Latest Version/ IPC A 610 Test
Answers Updated / New IPC A 610 Actual Exam Already
Graded A+
3 types of Conformal Coating: Acrylic Resin (AR) - ANSWER>>This type of coating
provides FAIR elasticity and general protection. It has high dielectric strength, and fair
moisture and abrasion resistance. This coating is different from others because its
facility for removal. This type are EASILY and quickly removed by a variety of solvents,
often without requiring agitation. This makes rework and field repair very practical and
economical. This type doesn't protect against solvents and solvent vapors.
3 types of Conformal Coating: Silicone Resin (SR) - ANSWER>>This type of coating
provides EXCELLENT protection in a very wide temperature range. This coating
provides good chemical resistance, moisture, and salt spray resistance, and is very
flexible. This type is NOT abrasion resistant because of its rubbery nature, but this
property does make it resilient against vibrational stresses. Commonly used in high-
humidity environments. Removal can be CHALLENGING. requiring specialized solvents,
long soak time, and agitation from a brush.
3 types of Conformal Coating: Urethane (Polyurethane) Resin (UR) - ANSWER>>This
type of coating is known for its EXCELLENT moisture and chemical resistance. It is
also very abrasion resistant. Combining those factors with its SOLVENT RESISTANCE
results in a conformal coating that is very difficult to remove. Like SR, full removal
generally requires special solvents, long soak time, and agitation with a brush. This is
common in aerospace application. ex: Conathane
5 Coating application methods: Manual Spraying - ANSWER>>Aerosol can or handheld
spray gun. Time consuming method of coating for a small quantity of boards. Lots of
masking beforehand. Quality and consistency of outcome are operator- dependent.
5 Coating application methods: Automated spraying - ANSWER>>Programmed spray
system that moves the board on a CONVEYOR under an alternative spray head that
applies a conformal coating.
, 5 Coating application methods: Selective coating - ANSWER>>An automated conformal
coating process that uses PROGRAMMABLE ROBOTIC SPRAY NOZZLES to apply the
coating to very specific areas on the circuit board. May eliminate the need for masking
using the program. The UV lamp in machine helps cure the coating right after it is
sprayed.
5 Coating application methods: Dipping - ANSWER>>The circuit board is first immersed,
Then withdrawn from the conformal coating solution. Immersion speed, withdrawn
speed, Immersion time, and Viscosity determine the resulting film formation. Common
for high volume processing. Masking may increase. This method is good to coat both
Front and Back of the board.
5 Coating application methods: Brushing - ANSWER>>Simple application method used
mainly in repair and rework. Conformal Coating is applied with a BRUSH to specific
areas on the board. Low-cost method but requires lots of manual labor and is highly
variable depending on operator proficiency and consistency. This is the best for a small
batch or a single board.
1. Solvent Removal
2. Peeling
3. Microblasting: using a concentrated mix of soft abrasive and compressed air to
abrade the coating.
4. Grinding/Scaping - ANSWER>>What are the Conformal Coating Removal Methods by
IPC? (4)
(6) Most Common Coating Defects and causes:
Capillary Flow - ANSWER>>occurs when coating migrates from one area of a board to
another, leaving behind an inconsistent, uneven finish on the surface.
Causes: -application of too much coating
- coating with low viscosity or high surface tension.
- low surface energy of component being coated.
(6) Most Common Coating Defects and causes:
Answers Updated / New IPC A 610 Actual Exam Already
Graded A+
3 types of Conformal Coating: Acrylic Resin (AR) - ANSWER>>This type of coating
provides FAIR elasticity and general protection. It has high dielectric strength, and fair
moisture and abrasion resistance. This coating is different from others because its
facility for removal. This type are EASILY and quickly removed by a variety of solvents,
often without requiring agitation. This makes rework and field repair very practical and
economical. This type doesn't protect against solvents and solvent vapors.
3 types of Conformal Coating: Silicone Resin (SR) - ANSWER>>This type of coating
provides EXCELLENT protection in a very wide temperature range. This coating
provides good chemical resistance, moisture, and salt spray resistance, and is very
flexible. This type is NOT abrasion resistant because of its rubbery nature, but this
property does make it resilient against vibrational stresses. Commonly used in high-
humidity environments. Removal can be CHALLENGING. requiring specialized solvents,
long soak time, and agitation from a brush.
3 types of Conformal Coating: Urethane (Polyurethane) Resin (UR) - ANSWER>>This
type of coating is known for its EXCELLENT moisture and chemical resistance. It is
also very abrasion resistant. Combining those factors with its SOLVENT RESISTANCE
results in a conformal coating that is very difficult to remove. Like SR, full removal
generally requires special solvents, long soak time, and agitation with a brush. This is
common in aerospace application. ex: Conathane
5 Coating application methods: Manual Spraying - ANSWER>>Aerosol can or handheld
spray gun. Time consuming method of coating for a small quantity of boards. Lots of
masking beforehand. Quality and consistency of outcome are operator- dependent.
5 Coating application methods: Automated spraying - ANSWER>>Programmed spray
system that moves the board on a CONVEYOR under an alternative spray head that
applies a conformal coating.
, 5 Coating application methods: Selective coating - ANSWER>>An automated conformal
coating process that uses PROGRAMMABLE ROBOTIC SPRAY NOZZLES to apply the
coating to very specific areas on the circuit board. May eliminate the need for masking
using the program. The UV lamp in machine helps cure the coating right after it is
sprayed.
5 Coating application methods: Dipping - ANSWER>>The circuit board is first immersed,
Then withdrawn from the conformal coating solution. Immersion speed, withdrawn
speed, Immersion time, and Viscosity determine the resulting film formation. Common
for high volume processing. Masking may increase. This method is good to coat both
Front and Back of the board.
5 Coating application methods: Brushing - ANSWER>>Simple application method used
mainly in repair and rework. Conformal Coating is applied with a BRUSH to specific
areas on the board. Low-cost method but requires lots of manual labor and is highly
variable depending on operator proficiency and consistency. This is the best for a small
batch or a single board.
1. Solvent Removal
2. Peeling
3. Microblasting: using a concentrated mix of soft abrasive and compressed air to
abrade the coating.
4. Grinding/Scaping - ANSWER>>What are the Conformal Coating Removal Methods by
IPC? (4)
(6) Most Common Coating Defects and causes:
Capillary Flow - ANSWER>>occurs when coating migrates from one area of a board to
another, leaving behind an inconsistent, uneven finish on the surface.
Causes: -application of too much coating
- coating with low viscosity or high surface tension.
- low surface energy of component being coated.
(6) Most Common Coating Defects and causes:
