AMPP Coating Inspector Program - Level 1 Practice Questions — 10 Free (2026)
Answer them, then check the reasoning and the clause each one comes from. No account, no card, nothing to dismiss.
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What is meant by the barrier mechanism of coating protection?
Worked answers
All ten AMPP Coating Inspector Program - Level 1 questions with the correct option, why it is correct and the paragraph it comes from. Attempt them above first — the reasoning is worth more than the key.
Show the ten answers and their references
- Q1 · AMPP CIP1 · Closed book
What is meant by the barrier mechanism of coating protection?
- A. The film resists the passage of water, oxygen and ions ✓
- B. The film supplies electrons to the steel wherever it becomes damaged
- C. The film releases chemicals that neutralise the corrosive environment
- D. The film reflects light and so keeps the surface temperature down
- E. The film conducts any applied current directly into the substrate
Barrier protection depends on the film restricting the transport of the species the corrosion reactions need. Supplying electrons is galvanic action, chemical release is inhibition, and reflection and conduction are unrelated. NACE/AMPP CIP Level 1 full theory manual, 1.1
- Q2 · AMPP CIP1 · Closed book
Why does relative humidity rise as the air cools in the evening?
- A. Because water is added to the air as the temperature falls each evening
- B. Because cooler air can hold less moisture ✓
- C. Because the barometric pressure falls at the same time each evening
- D. Because the steel surface warms as the air around it becomes cooler
- E. Because the instruments read differently at lower air temperatures
The moisture content stays the same while the capacity falls, so the relative figure climbs and the dew point is approached. Added water, pressure, surface warming and instrument behaviour are all incorrect. NACE/AMPP CIP Level 1 full theory manual, 3.1
- Q3 · AMPP CIP1 · Closed book
A blast nozzle should run at 690 kPa. The gauge at the nozzle reads 552 kPa. What percentage of the intended pressure is available?
- A. 20 percent
- B. 55 percent
- C. 80 percent ✓
- D. 110 percent
- E. 125 percent
The measured pressure is expressed as a proportion of the intended value. Inverting the ratio, or quoting the shortfall instead of the available fraction, gives the other answers. NACE/AMPP CIP Level 1 full theory manual, 5.2
- Q4 · AMPP CIP1 · Closed book
A product has 60 percent volume solids and a dry film thickness of 120 micrometres is required. What wet film thickness is needed with no thinning?
- A. 72 micrometres
- B. 150 micrometres
- C. 200 micrometres ✓
- D. 240 micrometres
- E. 720 micrometres
Dividing 120 micrometres by 0.6 gives 200 micrometres of wet film. Multiplying instead of dividing or misplacing the percentage produces the other answers. NACE/AMPP CIP Level 1 full theory manual, 6.2
- Q5 · AMPP CIP1 · Closed book
How do coatings and cathodic protection complement one another on a buried structure?
- A. The coating reduces the exposed area enormously ✓
- B. The coating supplies the current and the protection provides the barrier
- C. Both must be applied to the same square metre at once to work at all
- D. The protection improves the adhesion of the coating over its service life
- E. Coatings are used above ground and protection only below ground level
Coating quality is what makes the current demand affordable, and the current handles the holidays. Reversed roles, simultaneous application, improved adhesion and a location split are all incorrect. NACE/AMPP CIP Level 1 full theory manual, 1.1
- Q6 · AMPP CIP1 · Closed book
The dew point is 9 degrees Celsius and a 3 degree margin is specified. What is the lowest acceptable steel temperature?
- A. 3 degrees
- B. 6 degrees
- C. 9 degrees
- D. 12 degrees ✓
- E. 27 degrees
The margin is added to the dew point to give the minimum acceptable surface temperature. Subtracting the margin, or quoting the dew point itself, would allow condensation. NACE/AMPP CIP Level 1 full theory manual, 3.1
- Q7 · AMPP CIP1 · Closed book
A spring micrometre reads 102 micrometres on a replica tape whose incompressible film is 50 micrometres. What is the profile?
- A. 26 micrometres
- B. 50 micrometres
- C. 52 micrometres ✓
- D. 102 micrometres
- E. 152 micrometres
Subtracting the 50 micrometre film from the 102 micrometre reading gives a 52 micrometre profile. Halving, quoting either figure or adding them produces the other answers. NACE/AMPP CIP Level 1 full theory manual, 5.3
- Q8 · AMPP CIP1 · Closed book
A product is mixed four parts base to one part curing agent by volume. How much curing agent is needed for 12 litres of base?
- A. 1.5 litres
- B. 2.4 litres
- C. 3.0 litres ✓
- D. 4.0 litres
- E. 48.0 litres
The base volume is divided by the base part of the ratio to give the volume of one part. Multiplying instead of dividing, or misreading the ratio, gives the other options. NACE/AMPP CIP Level 1 full theory manual, 7.1
- Q9 · AMPP CIP1 · Closed book
What is the primary purpose of a protective coating on steel?
- A. To increase the mechanical strength of the steel it is applied to
- B. To conduct any cathodic protection current into the steel beneath
- C. To separate the steel from the corrosive environment ✓
- D. To raise the operating temperature the structure can withstand
- E. To allow the structure to be located electronically once buried
A coating works by keeping the electrolyte away from the metal, which prevents the anodic and cathodic reactions from proceeding on the surface. Strength, conducting current, temperature rating and locating are not what a coating provides. NACE/AMPP CIP Level 1 full theory manual, 1.1
- Q10 · AMPP CIP1 · Closed book
A product at 70 percent volume solids is thinned 10 percent by volume. What is the volume solids of the thinned material?
- A. 56 percent
- B. 60 percent
- C. 64 percent ✓
- D. 70 percent
- E. 77 percent
Adding one part thinner to ten parts product gives eleven parts total, so 70 divided by 1.1 is about 64 percent. Subtracting ten percentage points or leaving the value unchanged gives the other answers. NACE/AMPP CIP Level 1 full theory manual, 7.1
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