IPC A 610 ACTUAL EXAM PAPER 2026
QUESTIONS WITH ANSWERS GRADED A+
• Connector Pin Backplane.
• Answer:
Edge Connector Pin.
• Answer:
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.
• Extractor.
• Answer:
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
, • Press Fit Pins.
• Answer:
Solder Ferrule.
• Answer:
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.
• Lacing.
• Answer:
Wire Routing.
• Answer:
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.
QUESTIONS WITH ANSWERS GRADED A+
• Connector Pin Backplane.
• Answer:
Edge Connector Pin.
• Answer:
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.
• Extractor.
• Answer:
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
, • Press Fit Pins.
• Answer:
Solder Ferrule.
• Answer:
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.
• Lacing.
• Answer:
Wire Routing.
• Answer:
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.
