IPC-A-610 Test questions with answers

IPC-A-610 Test questions with answers |\ |\ |\ |\




3 types of Conformal Coating: Acrylic Resin (AR) -
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CORRECT ANSWERS ✔✔This type of coating provides FAIR |\ |\ |\ |\ |\ |\ |\



elasticity and general protection. It has high dielectric
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strength, and fair moisture and abrasion resistance. This
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coating is different from others because its facility for
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removal. This type are EASILY and quickly removed by a
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variety of solvents, often without requiring agitation. This
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makes rework and field repair very practical and
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economical. This type doesn't protect against solvents |\ |\ |\ |\ |\ |\ |\



and solvent vapors.
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3 types of Conformal Coating: Silicone Resin (SR) -
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CORRECT ANSWERS ✔✔This type of coating provides |\ |\ |\ |\ |\ |\ |\



EXCELLENT protection in a very wide temperature range. |\ |\ |\ |\ |\ |\ |\ |\



This coating provides good chemical resistance, moisture,
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and salt spray resistance, and is very flexible. This type is
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NOT abrasion resistant because of its rubbery nature, but
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this property does make it resilient against vibrational
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stresses. Commonly used in high-humidity environments.
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Removal can be CHALLENGING. requiring specialized
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solvents, long soak time, and agitation from a brush.
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3 types of Conformal Coating: Urethane (Polyurethane)
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Resin (UR) - CORRECT ANSWERS ✔✔This type of coating
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is known for its EXCELLENT moisture and chemical
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, resistance. It is also very abrasion resistant. Combining|\ |\ |\ |\ |\ |\ |\ |\



those factors with its SOLVENT RESISTANCE results in a
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conformal coating that is very difficult to remove. Like SR,
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full removal generally requires special solvents, long soak
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time, and agitation with a brush. This is common in
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aerospace application. ex: Conathane |\ |\ |\




5 Coating application methods: Manual Spraying -
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CORRECT ANSWERS ✔✔Aerosol can or handheld spray
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gun. Time consuming method of coating for a small
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quantity of boards. Lots of masking beforehand. Quality
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and consistency of outcome are operator- dependent.
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5 Coating application methods: Automated spraying -
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CORRECT ANSWERS ✔✔Programmed spray system that|\ |\ |\ |\ |\ |\



moves the board on a CONVEYOR under an alternative
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spray head that applies a conformal coating.
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5 Coating application methods: Selective coating -
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CORRECT ANSWERS ✔✔An automated conformal coating
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process that uses PROGRAMMABLE ROBOTIC SPRAY
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NOZZLES to apply the coating to very specific areas on
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the circuit board. May eliminate the need for masking
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using the program. The UV lamp in machine helps cure
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the coating right after it is sprayed.
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