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NACE / AMPP CIP LEVEL 2| NACE / AMPP CIP
LEVEL 1 ALL COMBINED EXAM SET
QUESTIONS WITH VERIFIED SOLUTIONS
2025/2026 LATEST UPDATE
True or False: None of the standards (WJ-1 through WJ-4) specifies the amount
of non visible contaminants (soluble salts) that are allowed to be left on the
surface. This is left up to the specifier. -- ANSWER--True
Back Thrust -- ANSWER--- Causes fatigue
- Should be no more than 1/3 of the operators body weight
When using UHP waterjetting with an inhibitor, the steel surface after cleaning
will appear __________. -- ANSWER--- As a dull matte finish
You are a new inspector on a UHP waterjetting project. What is the typical
distance between the waterjetting tip and surface that you would expect to see? -
- ANSWER--- 2 inches (5 cm)
Light (L) flash rusted surface: -- ANSWER--Not easily removed by lightly
wiping with a cloth
, Page 2 of 41
Moderate (M) flash rusted surface: -- ANSWER--Leaves light marks on a cloth
that is lightly wiped over the surface
Heavy (H) flash rusted surface: -- ANSWER--Leaves significant marks on a
cloth that is lightly wiped over the surface
The concentrated area of blast created by a centrifugal blast machine is called
the what? -- ANSWER--Hot spot
What could be the cause of low amperage readings on a centrifugal blast
machine? -- ANSWER--- An abrasive-starved wheel
- A flooded or choked wheel
True or False : Abrasive blast machines clean best with a range of abrasives. --
ANSWER--True
In a centrifugal blast operation, the degree of cleanliness is determined
primarily by __________. -- ANSWER--Speed of travel
What are some advantages of portable centrifugal blast cleaning? -- ANSWER--
- Can be used for multiple substrates
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- Dust can be collected for disposal
- Abrasives can be recycled
What are some abrasives that can be used in centrifugal blast units? --
ANSWER--- Steel shot/grit
- Glass beads
- Garnet
- Walnut shells
Low-Pressure Water Cleaning (LP WC) -- ANSWER--- Below 5,000 psig
- Also called "power washing" or "pressure washing"
High-Pressure Water Cleaning (HP WC) -- ANSWER--- 5,000 to 10,000 psig
High-Pressure Waterjetting (HP WJ) -- ANSWER--- 10,000 to 30,000 psig
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Ultrahigh-Pressure Waterjetting (UHP WJ) -- ANSWER--- 30,000 psig and
above
Advantages of Robotic Waterjetting include: -- ANSWER--- Controlled by
single operator
- Collects in excess of 95% of the water, removed coatings, and rust (waste
generated)
The waterjetting team consists of: -- ANSWER--- The nozzle operator
- The pump operator
- Additional operators or workers
Waterjetting is effective for removing: -- ANSWER--- Surface oil and grease
- Concrete (shot-crete) spatter
- Water-soluble contaminants
- Barnacles or other micro-organisms for ship hulls or off-shore platform legs
NACE / AMPP CIP LEVEL 2| NACE / AMPP CIP
LEVEL 1 ALL COMBINED EXAM SET
QUESTIONS WITH VERIFIED SOLUTIONS
2025/2026 LATEST UPDATE
True or False: None of the standards (WJ-1 through WJ-4) specifies the amount
of non visible contaminants (soluble salts) that are allowed to be left on the
surface. This is left up to the specifier. -- ANSWER--True
Back Thrust -- ANSWER--- Causes fatigue
- Should be no more than 1/3 of the operators body weight
When using UHP waterjetting with an inhibitor, the steel surface after cleaning
will appear __________. -- ANSWER--- As a dull matte finish
You are a new inspector on a UHP waterjetting project. What is the typical
distance between the waterjetting tip and surface that you would expect to see? -
- ANSWER--- 2 inches (5 cm)
Light (L) flash rusted surface: -- ANSWER--Not easily removed by lightly
wiping with a cloth
, Page 2 of 41
Moderate (M) flash rusted surface: -- ANSWER--Leaves light marks on a cloth
that is lightly wiped over the surface
Heavy (H) flash rusted surface: -- ANSWER--Leaves significant marks on a
cloth that is lightly wiped over the surface
The concentrated area of blast created by a centrifugal blast machine is called
the what? -- ANSWER--Hot spot
What could be the cause of low amperage readings on a centrifugal blast
machine? -- ANSWER--- An abrasive-starved wheel
- A flooded or choked wheel
True or False : Abrasive blast machines clean best with a range of abrasives. --
ANSWER--True
In a centrifugal blast operation, the degree of cleanliness is determined
primarily by __________. -- ANSWER--Speed of travel
What are some advantages of portable centrifugal blast cleaning? -- ANSWER--
- Can be used for multiple substrates
, Page 3 of 41
- Dust can be collected for disposal
- Abrasives can be recycled
What are some abrasives that can be used in centrifugal blast units? --
ANSWER--- Steel shot/grit
- Glass beads
- Garnet
- Walnut shells
Low-Pressure Water Cleaning (LP WC) -- ANSWER--- Below 5,000 psig
- Also called "power washing" or "pressure washing"
High-Pressure Water Cleaning (HP WC) -- ANSWER--- 5,000 to 10,000 psig
High-Pressure Waterjetting (HP WJ) -- ANSWER--- 10,000 to 30,000 psig
, Page 4 of 41
Ultrahigh-Pressure Waterjetting (UHP WJ) -- ANSWER--- 30,000 psig and
above
Advantages of Robotic Waterjetting include: -- ANSWER--- Controlled by
single operator
- Collects in excess of 95% of the water, removed coatings, and rust (waste
generated)
The waterjetting team consists of: -- ANSWER--- The nozzle operator
- The pump operator
- Additional operators or workers
Waterjetting is effective for removing: -- ANSWER--- Surface oil and grease
- Concrete (shot-crete) spatter
- Water-soluble contaminants
- Barnacles or other micro-organisms for ship hulls or off-shore platform legs
