Random 50-Question Practice Test
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Printable Cheat Sheets
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1. Inspector Workflow
| Stage | What to Verify |
|---|---|
| Before work | Specification, coating system, product data sheets, safety data sheets, hold points, equipment, calibration, weather limits. |
| Surface prep | Cleanliness, visible contaminants, soluble salts if specified, anchor profile, dust, sharp edges, welds, and substrate condition. |
| Environmental check | Air temperature, surface temperature, relative humidity, dew point, and whether surface is safely above dew point. |
| Application | Mixing, induction time, pot life, thinner use, application method, wet film thickness, recoat window, stripe coating. |
| After application | Dry film thickness, cure, defects, adhesion if specified, holiday testing if specified, documentation. |
2. Environmental Conditions
- Measure and record ambient temperature, surface temperature, relative humidity, and dew point.
- Many coating specs require the surface temperature to be at least 5°F / 3°C above dew point.
- Watch for changing conditions: sunrise, shade, wind, fog, rain, cold steel, and enclosed spaces.
- Do not rely on “it feels dry.” Use calibrated instruments and document readings.
3. DFT / WFT Quick Notes
- WFT = wet film thickness, measured during application.
- DFT = dry film thickness, measured after curing/drying.
- Basic estimate: WFT = desired DFT ÷ volume solids.
- Example: 4 mils DFT at 50% solids needs about 8 mils WFT.
- Always follow the project specification and the coating manufacturer’s product data sheet.
4. Surface Preparation
| Issue | Inspector Focus |
|---|---|
| Oil/grease | Must be removed before blasting or coating. Blasting can spread contamination. |
| Mill scale/rust/old coating | Verify required cleanliness level from the spec. |
| Anchor profile | Profile must match coating system requirements. Too low = poor mechanical adhesion; too high = peak coverage risk. |
| Dust/debris | Clean before coating. Dust can reduce adhesion and create defects. |
| Edges/welds | Sharp edges and weld irregularities are common failure points; stripe coat if specified. |
5. Common Coating Defects
| Defect | Plain-English Meaning |
|---|---|
| Runs / sags | Coating applied too heavily or poor application control. |
| Pinholes | Tiny voids through coating film; can become corrosion sites. |
| Holidays | Missed areas or discontinuities in coating film. |
| Blistering | Loss of adhesion or osmotic pressure under coating. |
| Orange peel | Textured appearance often related to spray technique, viscosity, or conditions. |
| Solvent pop | Trapped solvent escaping and leaving small craters/voids. |
Flashcards
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7-Day Quick Study Plan
- Day 1: Coating basics, corrosion basics, inspector responsibilities.
- Day 2: Surface preparation, abrasive blasting, cleanliness, anchor profile.
- Day 3: Environmental readings, dew point, humidity, temperature limits.
- Day 4: Application, WFT, DFT, stripe coats, recoat windows, pot life.
- Day 5: Defects, holiday testing, adhesion testing, cure checks.
- Day 6: Documentation, daily reports, nonconformance, hold points.
- Day 7: Mixed practice test + review every missed question.
Disclaimer
This site is an independent study aid. It is not affiliated with AMPP, NACE, SSPC, or Pearson VUE, and it does not reproduce official exam questions.