NACE PN TO RN EXAMS NEWEST 2 WITH LATEST VERSIONS (VERSION A B & C
) WITH ACTUAL CORRECT QUESTIONS AND VERIFIED DETAILED
RATIONALES ANSWERS BY EXPERTS |FREQUENTLY TESTED QUESTIONS AND
SOLUTIONS | LATEST 2025 | ALREADY GRADED A+ | GUARANTEED PASS
What is the cause of chalking in epoxy coating -
Answer-UV or radiation exposure
What is polymerization cured coating? -
Answer-Two parts mixed together just prior to use
Examples of non-convertible coatings -
Answer-1. Chlorinated rubber 2. Vinyl 3. Acrylic 4. Bituminous
Non-convertible curing def. -
Answer-No chemical change during cure cycle
Convertible curing def. -
Answer-Some chemical change during cure cycle
What info should be included when sending samples to a lab? -
Answer-1. Identity of materials 2. Properly packed/labeled samples 3. Chain of custody form 4.
Type of analysis that is expected and the concentrations of interest
Specialized tests or equipment coating inspectors may encounter -
Answer-1. AA/AE Atomic Absorption/Emission 2. ISP Induction coupled plasma Spectrometer
3. GLC Gas liquid chromatographs 4. IR, FTIR, FTIR-ATR INfrared spectrophotometers 5. DSC
Differential scanning calorimeters
What is a cathodic dis-bondment test? -
Answer-Procedure to determine how easily a coating loosens from a substrate or develops
holidays as a result of normal soil potentials
Individuals who perform surveys -
Answer-1. O-Cat or S-cat tech 2. NACE coating specialist 3. NACE Level III 4. Coating
Inspector w/field experience 5. Coating manufacturer representative 6. Maintenence engineer
with specific plant knowledge.
Coating survey steps -
Answer-1. Understand scope 2. Gather team 3. Develop survey plan 4. Review standards 5.
Agree on format 6. Delegate various tasks 7. Eveluate existing coating 8. Delegate various tasks
9. Evaluate existing coating 10. Gather additional info 11. Summarize data 12. Prepare
maintenance plans 13. Prepare reports/input data 14. Submit final survey reports.
List some of the primary reasons surveys are performed -
Answer-1. Plan maintenance. 2. Prioritize work 3. Budgetary concerns 4. Determine value of
assets 5. Legal compliance
,Definition of a coating survey -
Answer-Gather baseline info needed to plan maintenance coating procedures
What are faying surfaces and why not galvanize them? -
Answer-Surfaces that depend on friction to hold galvanizing it may/will reduce friction if they
are galvanized
Common problems seen during the usual inspections of HD galvanized items -
Answer-1. Cracking 2. Peeling 3. Bare spots 4. Lumps 5. Blisters 6. Flux inclusions 7. Ash
inclusions 8. Dross inclusions
Post galvanizing treatments and why -
Answer-To Remove Thickness: Roll, Wipe, Centrifuge/Air Blast
To change properties/To alloy: Annealing
Temperature range for galvanizing kettle -
Answer-820-850 F
Purpose of pickling -
Answer-Hydrochloric or sulfuric acid bath to remove oxides and mill scale
Purpose of caustic cleaning -
Answer-Acid bath or caustic to remove dirt, oil and grease
Stages of hot dip process -
Answer-1. Surface prep. 2. Galvanizing 3. Post treatment
4. Inspection
Hot dip galvanizing safety -
Answer-1. Can stay for some time 2. Molten metal splash
3. Nascent hydrogen above kettle
Usual layers of galvanized coating consists of: -
Answer-1. ETA=100% Zn 2. ZETA= 94% Zn 6%Fe 3. DELTA= 90% Zn 10 Fe 4. GAMMA=
75% Zn 25% Fe
What is hot dip galvanizing? -
Answer-Coating iron or steel with zinc at temperatures of 820-860 F
If a maintenance coating to be applied is incompatible with the existing coating
system may occur -
Answer-Curling
is performed at the work area by working the edges of the repaired
area back to achieve a fairly smooth transition from the repair area to sound coating. -
Answer-Feathering
, With regards to maint. coating all parties should agree on ?-
Answer-1. Spot repair requirements 2. Feathering 3. Appearance of repaired areas
) WITH ACTUAL CORRECT QUESTIONS AND VERIFIED DETAILED
RATIONALES ANSWERS BY EXPERTS |FREQUENTLY TESTED QUESTIONS AND
SOLUTIONS | LATEST 2025 | ALREADY GRADED A+ | GUARANTEED PASS
What is the cause of chalking in epoxy coating -
Answer-UV or radiation exposure
What is polymerization cured coating? -
Answer-Two parts mixed together just prior to use
Examples of non-convertible coatings -
Answer-1. Chlorinated rubber 2. Vinyl 3. Acrylic 4. Bituminous
Non-convertible curing def. -
Answer-No chemical change during cure cycle
Convertible curing def. -
Answer-Some chemical change during cure cycle
What info should be included when sending samples to a lab? -
Answer-1. Identity of materials 2. Properly packed/labeled samples 3. Chain of custody form 4.
Type of analysis that is expected and the concentrations of interest
Specialized tests or equipment coating inspectors may encounter -
Answer-1. AA/AE Atomic Absorption/Emission 2. ISP Induction coupled plasma Spectrometer
3. GLC Gas liquid chromatographs 4. IR, FTIR, FTIR-ATR INfrared spectrophotometers 5. DSC
Differential scanning calorimeters
What is a cathodic dis-bondment test? -
Answer-Procedure to determine how easily a coating loosens from a substrate or develops
holidays as a result of normal soil potentials
Individuals who perform surveys -
Answer-1. O-Cat or S-cat tech 2. NACE coating specialist 3. NACE Level III 4. Coating
Inspector w/field experience 5. Coating manufacturer representative 6. Maintenence engineer
with specific plant knowledge.
Coating survey steps -
Answer-1. Understand scope 2. Gather team 3. Develop survey plan 4. Review standards 5.
Agree on format 6. Delegate various tasks 7. Eveluate existing coating 8. Delegate various tasks
9. Evaluate existing coating 10. Gather additional info 11. Summarize data 12. Prepare
maintenance plans 13. Prepare reports/input data 14. Submit final survey reports.
List some of the primary reasons surveys are performed -
Answer-1. Plan maintenance. 2. Prioritize work 3. Budgetary concerns 4. Determine value of
assets 5. Legal compliance
,Definition of a coating survey -
Answer-Gather baseline info needed to plan maintenance coating procedures
What are faying surfaces and why not galvanize them? -
Answer-Surfaces that depend on friction to hold galvanizing it may/will reduce friction if they
are galvanized
Common problems seen during the usual inspections of HD galvanized items -
Answer-1. Cracking 2. Peeling 3. Bare spots 4. Lumps 5. Blisters 6. Flux inclusions 7. Ash
inclusions 8. Dross inclusions
Post galvanizing treatments and why -
Answer-To Remove Thickness: Roll, Wipe, Centrifuge/Air Blast
To change properties/To alloy: Annealing
Temperature range for galvanizing kettle -
Answer-820-850 F
Purpose of pickling -
Answer-Hydrochloric or sulfuric acid bath to remove oxides and mill scale
Purpose of caustic cleaning -
Answer-Acid bath or caustic to remove dirt, oil and grease
Stages of hot dip process -
Answer-1. Surface prep. 2. Galvanizing 3. Post treatment
4. Inspection
Hot dip galvanizing safety -
Answer-1. Can stay for some time 2. Molten metal splash
3. Nascent hydrogen above kettle
Usual layers of galvanized coating consists of: -
Answer-1. ETA=100% Zn 2. ZETA= 94% Zn 6%Fe 3. DELTA= 90% Zn 10 Fe 4. GAMMA=
75% Zn 25% Fe
What is hot dip galvanizing? -
Answer-Coating iron or steel with zinc at temperatures of 820-860 F
If a maintenance coating to be applied is incompatible with the existing coating
system may occur -
Answer-Curling
is performed at the work area by working the edges of the repaired
area back to achieve a fairly smooth transition from the repair area to sound coating. -
Answer-Feathering
, With regards to maint. coating all parties should agree on ?-
Answer-1. Spot repair requirements 2. Feathering 3. Appearance of repaired areas
