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AMPP Senior Internal Corrosion Technologist Exam - Topic 3 Question 1 Discussion

You are NACE Level 2 Inspector working on a tank lining job where a mobile centrifugal blast unit is being used to blast the tank floor to a NACE No. 1/SSPC SP 5. The Contractor has completed his final blast and has called for a hold point inspection. This is the 1st time you have seen field based centrifugal blast cleaning. You observe what appears to be staining on the substrate however the Contractor assures you this is normal when using centrifugal blast units and what you are seeing is what is defined In the standard as an acceptable variation in appearance.Your FIRST preferred course of action Is to:
B) Review the standard with the Contractor and re-inspect the floor
A) Request that the Contractor re-blast the floor
C) Shut the job down
D) Call your supervisor

AMPP Senior Internal Corrosion Technologist Exam - Topic 3 Question 1 Discussion

Actual exam question for AMPP's Senior Internal Corrosion Technologist exam
Question #: 1
Topic #: 3
[All Senior Internal Corrosion Technologist Questions]

You are NACE Level 2 Inspector working on a tank lining job where a mobile centrifugal blast unit is being used to blast the tank floor to a NACE No. 1/SSPC SP 5. The Contractor has completed his final blast and has called for a hold point inspection. This is the 1st time you have seen field based centrifugal blast cleaning. You observe what appears to be staining on the substrate however the Contractor assures you this is normal when using centrifugal blast units and what you are seeing is what is defined In the standard as an acceptable variation in appearance.

Your FIRST preferred course of action Is to:

Show Suggested Answer Hide Answer
Suggested Answer: B

by Delfina at Jul 02, 2026, 12:40 PM

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Renea
3 days ago
No way, I’d just re-blast it to be safe.
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Sharmaine
8 days ago
I’d be cautious, though. Staining can mean issues.
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Miles
13 days ago
Definitely review the standard first!
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Keneth
19 days ago
I’ve seen staining before, it can be normal.
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Stephane
24 days ago
I recall a similar scenario where we had to balance contractor assurances with our own observations. I think option B is the safest bet, but I wonder if I should also consider calling my supervisor just to be cautious.
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Precious
29 days ago
I'm a bit uncertain here. I know we shouldn't just take the Contractor's word for it, but shutting down the job seems extreme. Maybe I should lean towards reviewing the standard first?
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Junita
1 month ago
This situation seems familiar from a practice question we did about acceptable variations. I feel like option B could help clarify things, but what if the staining is actually a problem?
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Chantay
1 month ago
I remember discussing the importance of understanding the standards during our training. I think reviewing the standard with the Contractor makes sense, but I'm not entirely sure if that's the best first step.
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