PROTECTIVE COATINGS SPECIALIST (PCS) FULL-LENGTH
PRACTICE EXAM ACCURATE AND CURRENTLY TESTING –
100 QUESTIONS WITH DETAILED RATIONALES AND A
STUDY GUIDE | EXPERT VERIFIED FOR GUARANTEED PASS
|2 VERSIONS
1. Which environment is MOST likely to accelerate galvanic corrosion between two dissimilar
metals?
A. Dry interior air at 20 % relative humidity
B. Immersed in seawater
C. Buried in dry desert soil
D. Refrigerated at –10 °C
Correct Answer: B
Rationale: Galvanic corrosion requires an electrolyte. Seawater provides continuous
conductivity and high salt content, making it far more aggressive than dry or frozen conditions.
2. An epoxy phenolic lining is primarily specified for:
A. Ultraviolet resistance on exterior steel
B. High-temperature chemical immersion service
C. Decorative interior walls
D. Low-temperature cryogenic piping
Correct Answer: B
Rationale: Epoxy phenolics tolerate strong chemicals and temperatures up to about 200 °C,
ideal for chemical-processing or tank linings.
3. According to SSPC-SP 10/NACE No. 2, a near-white metal blast must have no more than
____ % staining of each square inch.
A. 0.5 %
B. 5 %
,C. 10 %
D. 33 %
Correct Answer: B
Rationale: SP 10 permits only 5 % maximum staining (light shadows or discoloration) to
qualify as near-white.
4. When using plural-component spray equipment, the most critical factor for proper mixing at
the gun is:
A. Air pressure alone
B. Accurate ratio and temperature control of the two components
C. Color of the mixed coating
D. Distance from the work surface
Correct Answer: B
Rationale: Two-component coatings must be mixed at the correct ratio and temperature just
before atomization to achieve full cure and performance.
5. Which document establishes minimum health and safety requirements for abrasive blasting?
A. ASTM D4417
B. SSPC-Guide 17
C. OSHA 29 CFR 1910.94
D. NACE SP0188
Correct Answer: C
Rationale: OSHA 29 CFR 1910.94 covers ventilation, protective equipment, and other safety
requirements for abrasive blasting operations.
6. The main purpose of a holiday (pin-hole) detector is to:
A. Check coating thickness
B. Locate discontinuities in non-conductive coatings on conductive substrates
C. Measure surface profile
,D. Verify curing temperature
Correct Answer: B
Rationale: A holiday detector uses high or low voltage to find pinholes or voids in coatings over
metal.
7. When using a Type 2 magnetic dry film thickness gauge, the first step is to:
A. Calibrate with a known plastic shim
B. Zero the gauge on a coated panel
C. Measure at least three random spots
D. Clean with solvent
Correct Answer: A
Rationale: Type 2 gauges require calibration with certified shims to ensure accurate readings.
8. Which abrasive size designation represents the coarsest grit?
A. 40/50
B. 20/40
C. 30/60
D. 80/120
Correct Answer: B
Rationale: The lower the first number, the coarser the abrasive. 20/40 is coarser than 30/60 or
40/50.
9. A surface with mill scale intact and light rusting is best prepared to SSPC standard:
A. SP-1
B. SP-2
C. SP-3
D. SP-7
Correct Answer: D
, Rationale: SP-7 (Brush-Off Blast) removes loose rust and mill scale while leaving tightly
adherent material.
10. Before applying a zinc-rich primer, the steel surface should be:
A. Smooth and polished
B. Prepared to near-white metal with 1.5–3 mil profile
C. Degreased only
D. Etched with acid only
Correct Answer: B
Rationale: Zinc-rich primers need a clean, roughened profile (typically SSPC-SP 10, 1.5–3 mils)
for proper adhesion and galvanic protection.
11. Which type of corrosion occurs under deposits of dirt, salts, or coatings that trap moisture?
A. Pitting corrosion
B. Crevice corrosion
C. Galvanic corrosion
D. Uniform corrosion
Correct Answer: B
Rationale: Crevice corrosion develops where oxygen levels differ—such as beneath deposits or
gaskets—creating a localized cell.
12. A zinc-rich primer protects steel primarily by:
A. Increasing film thickness
B. Cathodic (sacrificial) protection
C. Acting as a vapor barrier only
D. Reflecting UV light
Correct Answer: B
Rationale: Zinc is anodic to steel, corroding preferentially and providing cathodic protection.
PRACTICE EXAM ACCURATE AND CURRENTLY TESTING –
100 QUESTIONS WITH DETAILED RATIONALES AND A
STUDY GUIDE | EXPERT VERIFIED FOR GUARANTEED PASS
|2 VERSIONS
1. Which environment is MOST likely to accelerate galvanic corrosion between two dissimilar
metals?
A. Dry interior air at 20 % relative humidity
B. Immersed in seawater
C. Buried in dry desert soil
D. Refrigerated at –10 °C
Correct Answer: B
Rationale: Galvanic corrosion requires an electrolyte. Seawater provides continuous
conductivity and high salt content, making it far more aggressive than dry or frozen conditions.
2. An epoxy phenolic lining is primarily specified for:
A. Ultraviolet resistance on exterior steel
B. High-temperature chemical immersion service
C. Decorative interior walls
D. Low-temperature cryogenic piping
Correct Answer: B
Rationale: Epoxy phenolics tolerate strong chemicals and temperatures up to about 200 °C,
ideal for chemical-processing or tank linings.
3. According to SSPC-SP 10/NACE No. 2, a near-white metal blast must have no more than
____ % staining of each square inch.
A. 0.5 %
B. 5 %
,C. 10 %
D. 33 %
Correct Answer: B
Rationale: SP 10 permits only 5 % maximum staining (light shadows or discoloration) to
qualify as near-white.
4. When using plural-component spray equipment, the most critical factor for proper mixing at
the gun is:
A. Air pressure alone
B. Accurate ratio and temperature control of the two components
C. Color of the mixed coating
D. Distance from the work surface
Correct Answer: B
Rationale: Two-component coatings must be mixed at the correct ratio and temperature just
before atomization to achieve full cure and performance.
5. Which document establishes minimum health and safety requirements for abrasive blasting?
A. ASTM D4417
B. SSPC-Guide 17
C. OSHA 29 CFR 1910.94
D. NACE SP0188
Correct Answer: C
Rationale: OSHA 29 CFR 1910.94 covers ventilation, protective equipment, and other safety
requirements for abrasive blasting operations.
6. The main purpose of a holiday (pin-hole) detector is to:
A. Check coating thickness
B. Locate discontinuities in non-conductive coatings on conductive substrates
C. Measure surface profile
,D. Verify curing temperature
Correct Answer: B
Rationale: A holiday detector uses high or low voltage to find pinholes or voids in coatings over
metal.
7. When using a Type 2 magnetic dry film thickness gauge, the first step is to:
A. Calibrate with a known plastic shim
B. Zero the gauge on a coated panel
C. Measure at least three random spots
D. Clean with solvent
Correct Answer: A
Rationale: Type 2 gauges require calibration with certified shims to ensure accurate readings.
8. Which abrasive size designation represents the coarsest grit?
A. 40/50
B. 20/40
C. 30/60
D. 80/120
Correct Answer: B
Rationale: The lower the first number, the coarser the abrasive. 20/40 is coarser than 30/60 or
40/50.
9. A surface with mill scale intact and light rusting is best prepared to SSPC standard:
A. SP-1
B. SP-2
C. SP-3
D. SP-7
Correct Answer: D
, Rationale: SP-7 (Brush-Off Blast) removes loose rust and mill scale while leaving tightly
adherent material.
10. Before applying a zinc-rich primer, the steel surface should be:
A. Smooth and polished
B. Prepared to near-white metal with 1.5–3 mil profile
C. Degreased only
D. Etched with acid only
Correct Answer: B
Rationale: Zinc-rich primers need a clean, roughened profile (typically SSPC-SP 10, 1.5–3 mils)
for proper adhesion and galvanic protection.
11. Which type of corrosion occurs under deposits of dirt, salts, or coatings that trap moisture?
A. Pitting corrosion
B. Crevice corrosion
C. Galvanic corrosion
D. Uniform corrosion
Correct Answer: B
Rationale: Crevice corrosion develops where oxygen levels differ—such as beneath deposits or
gaskets—creating a localized cell.
12. A zinc-rich primer protects steel primarily by:
A. Increasing film thickness
B. Cathodic (sacrificial) protection
C. Acting as a vapor barrier only
D. Reflecting UV light
Correct Answer: B
Rationale: Zinc is anodic to steel, corroding preferentially and providing cathodic protection.
