1. Which of the following is the primary function of a protective coating?
A. Aesthetic enhancement
B. Corrosion prevention
C. Weight reduction
D. Heat insulation
Answer: B – Corrosion prevention
Explanation: While coatings can improve appearance, their main function in
industrial settings is to protect substrates (usually metals) from corrosion and
degradation.
2. The most critical step in ensuring coating performance is:
A. Coating selection
B. Surface preparation
C. Curing time
D. Paint mixing
Answer: B – Surface preparation
Explanation: Poor surface prep is the leading cause of coating failures. SSPC-
SP and ISO standards detail surface cleanliness and profile requirements.
3. According to SSPC standards, SP-10 refers to:
A. Near-white metal blast cleaning
B. Commercial blast cleaning
C. Brush-off blast cleaning
D. White metal blast cleaning
Answer: A – Near-white metal blast cleaning
Explanation: SSPC-SP 10 achieves nearly all surface contaminants removed,
leaving no more than 5% staining.
,4. Which coating type typically provides the best chemical resistance?
A. Alkyd
B. Epoxy
C. Acrylic
D. Vinyl
Answer: B – Epoxy
Explanation: Epoxies are highly resistant to chemicals, abrasion, and
immersion conditions, making them common in marine and chemical plant
applications.
5. The profile height for most protective coating systems is typically:
A. 0.5–1 mils
B. 1–2 mils
C. 2–4 mils
D. 5–8 mils
Answer: C – 2–4 mils
Explanation: This range is common for achieving proper coating adhesion
without excessive coating consumption.
6. In coating inspection, a holiday is:
A. A scheduled shutdown
B. A gap or pinhole in coating film
C. A curing delay
D. A surface profile peak
Answer: B – A gap or pinhole in coating film
Explanation: Holidays are coating discontinuities that can lead to corrosion;
detected using holiday detectors.
7. Which organization provides PCS certification?
A. ASTM
B. NACE International (AMPP)
C. SSPC only
D. OSHA
,Answer: B – NACE International (now AMPP)
Explanation: The PCS credential is issued by AMPP (Association for Materials
Protection and Performance), formed by the merger of NACE and SSPC.
8. The primary cause of coating chalking is:
A. Chemical attack
B. Ultraviolet degradation
C. High humidity
D. Poor mixing
Answer: B – Ultraviolet degradation
Explanation: UV light breaks down resin binders, causing pigment particles to
become loose and form chalk-like deposits.
9. Which is the best method to verify surface profile after blasting?
A. Visual observation
B. Replica tape
C. Micrometer
D. Gloss meter
Answer: B – Replica tape
Explanation: Replica tape captures the peak-to-valley profile, which can be
measured with a micrometer to verify compliance.
10. Which type of coating is best for high-temperature service above 400°F
(204°C)?
A. Epoxy
B. Phenolic
C. Silicone
D. Polyurethane
Answer: C – Silicone
Explanation: Silicone-based coatings can withstand very high temperatures
without losing adhesion or degrading.
11. What does the term "DFT" stand for in coatings?
A. Dry Film Thickness
B. Drying Film Time
, C. Double Film Test
D. Density of Film Thickness
Answer: A – Dry Film Thickness
Explanation: DFT is the thickness of the coating after it has dried and cured;
it’s critical for performance and is measured in mils or micrometers.
12. Which tool is commonly used to measure wet film thickness (WFT)?
A. Micrometer
B. Wet film comb (notched gauge)
C. Pull-off adhesion tester
D. Holiday detector
Answer: B – Wet film comb (notched gauge)
Explanation: A WFT comb measures the thickness of a freshly applied wet
coating so the applicator can estimate expected DFT after cure.
13. Which failure mode is indicated by underfilm corrosion with localized
blistering?
A. Osmotic blistering due to soluble salts
B. Generalized chalking from UV
C. Abrasion wear
D. Crazing from temperature cycling
Answer: A – Osmotic blistering due to soluble salts
Explanation: Soluble salts or contaminants attract moisture, creating osmotic
pressure and causing localized blisters under the film.
14. What is the primary safety hazard when using solvent-borne coatings in
confined spaces?
A. Ultraviolet exposure
B. Fire/explosion from flammable vapors
C. Cold shock
D. Electrical shock
Answer: B – Fire/explosion from flammable vapors
Explanation: Solvent vapors can accumulate and reach flammable limits;
ventilation and monitoring are essential.
15. Which test is used to evaluate solvent resistance of a cured coating?
A. Cross-cut adhesion
B. MEK rub test (methyl ethyl ketone)
C. Salt fog chamber
D. Dry film thickness gauge
Answer: B – MEK rub test (methyl ethyl ketone)
Explanation: The MEK rub test assesses softening or removal of the film when
repeatedly rubbed with solvent-soaked cloth.
A. Aesthetic enhancement
B. Corrosion prevention
C. Weight reduction
D. Heat insulation
Answer: B – Corrosion prevention
Explanation: While coatings can improve appearance, their main function in
industrial settings is to protect substrates (usually metals) from corrosion and
degradation.
2. The most critical step in ensuring coating performance is:
A. Coating selection
B. Surface preparation
C. Curing time
D. Paint mixing
Answer: B – Surface preparation
Explanation: Poor surface prep is the leading cause of coating failures. SSPC-
SP and ISO standards detail surface cleanliness and profile requirements.
3. According to SSPC standards, SP-10 refers to:
A. Near-white metal blast cleaning
B. Commercial blast cleaning
C. Brush-off blast cleaning
D. White metal blast cleaning
Answer: A – Near-white metal blast cleaning
Explanation: SSPC-SP 10 achieves nearly all surface contaminants removed,
leaving no more than 5% staining.
,4. Which coating type typically provides the best chemical resistance?
A. Alkyd
B. Epoxy
C. Acrylic
D. Vinyl
Answer: B – Epoxy
Explanation: Epoxies are highly resistant to chemicals, abrasion, and
immersion conditions, making them common in marine and chemical plant
applications.
5. The profile height for most protective coating systems is typically:
A. 0.5–1 mils
B. 1–2 mils
C. 2–4 mils
D. 5–8 mils
Answer: C – 2–4 mils
Explanation: This range is common for achieving proper coating adhesion
without excessive coating consumption.
6. In coating inspection, a holiday is:
A. A scheduled shutdown
B. A gap or pinhole in coating film
C. A curing delay
D. A surface profile peak
Answer: B – A gap or pinhole in coating film
Explanation: Holidays are coating discontinuities that can lead to corrosion;
detected using holiday detectors.
7. Which organization provides PCS certification?
A. ASTM
B. NACE International (AMPP)
C. SSPC only
D. OSHA
,Answer: B – NACE International (now AMPP)
Explanation: The PCS credential is issued by AMPP (Association for Materials
Protection and Performance), formed by the merger of NACE and SSPC.
8. The primary cause of coating chalking is:
A. Chemical attack
B. Ultraviolet degradation
C. High humidity
D. Poor mixing
Answer: B – Ultraviolet degradation
Explanation: UV light breaks down resin binders, causing pigment particles to
become loose and form chalk-like deposits.
9. Which is the best method to verify surface profile after blasting?
A. Visual observation
B. Replica tape
C. Micrometer
D. Gloss meter
Answer: B – Replica tape
Explanation: Replica tape captures the peak-to-valley profile, which can be
measured with a micrometer to verify compliance.
10. Which type of coating is best for high-temperature service above 400°F
(204°C)?
A. Epoxy
B. Phenolic
C. Silicone
D. Polyurethane
Answer: C – Silicone
Explanation: Silicone-based coatings can withstand very high temperatures
without losing adhesion or degrading.
11. What does the term "DFT" stand for in coatings?
A. Dry Film Thickness
B. Drying Film Time
, C. Double Film Test
D. Density of Film Thickness
Answer: A – Dry Film Thickness
Explanation: DFT is the thickness of the coating after it has dried and cured;
it’s critical for performance and is measured in mils or micrometers.
12. Which tool is commonly used to measure wet film thickness (WFT)?
A. Micrometer
B. Wet film comb (notched gauge)
C. Pull-off adhesion tester
D. Holiday detector
Answer: B – Wet film comb (notched gauge)
Explanation: A WFT comb measures the thickness of a freshly applied wet
coating so the applicator can estimate expected DFT after cure.
13. Which failure mode is indicated by underfilm corrosion with localized
blistering?
A. Osmotic blistering due to soluble salts
B. Generalized chalking from UV
C. Abrasion wear
D. Crazing from temperature cycling
Answer: A – Osmotic blistering due to soluble salts
Explanation: Soluble salts or contaminants attract moisture, creating osmotic
pressure and causing localized blisters under the film.
14. What is the primary safety hazard when using solvent-borne coatings in
confined spaces?
A. Ultraviolet exposure
B. Fire/explosion from flammable vapors
C. Cold shock
D. Electrical shock
Answer: B – Fire/explosion from flammable vapors
Explanation: Solvent vapors can accumulate and reach flammable limits;
ventilation and monitoring are essential.
15. Which test is used to evaluate solvent resistance of a cured coating?
A. Cross-cut adhesion
B. MEK rub test (methyl ethyl ketone)
C. Salt fog chamber
D. Dry film thickness gauge
Answer: B – MEK rub test (methyl ethyl ketone)
Explanation: The MEK rub test assesses softening or removal of the film when
repeatedly rubbed with solvent-soaked cloth.
