Comprehensive Test Flashcards
Some metals have a slower corrosion rate due to a phenomenon known as:
A. Saponification
B. Passivation
C. Crack baby syndrome
D. Manufacturing
B. Passivation
Brush-Off Blast Cleaning of Coated and Uncoated Galvanized Steel, Stainless steels, and Non-Ferrous Metals
NACE 4/SSPC-SP 7
SSPC-SP 10
SSPC-SP 7
SSPC-SP 16
SSPC-SP 16
Some common design and fabrication defects that affect the coating process include:
Hard to reach or inaccessible areas
Rivets, bolts, or other connectors
Welds
Gaps (skip welds)
Overlapping surfaces
Angle iron badly oriented
What are some factors that affect the life of a coating?
Residues of oil, grease , and soil
Residues of (non-visible) chemical salts
Rust on the surface
Loose or broken mill scale
Tight mill scale
Rust scale
Anchor pattern issues
The preparation of aluminum and aluminum alloy surfaces
A. ASTM D 4285
B. ASTM D 1730
C. ASTM D 3359
D. NACE SP0178
B. ASTM D 1730
What are some common design defects?
Hard to reach or inaccessible areas
Rivets, bolts, other connectors
Welds, skip welds, gaps
Overlapping surfaces
Angle iron badly oriented
Threaded areas
Dissimilar metals
Sharp edges, corners,
Construction aids
Where defects are exposed by blast cleaning and subsequently removed by grinding, it is necessary to reprepare the immediate area to retain the surface profile
A. True
B. False
A. True
What is the most common defect on steel substrates?
A. Inclusions
B. Corrosion
C. Surface laminations
D. Mill Scale
C. Surface Laminations
What are some common fabrication errors?
Weld Spatter (Splatter)
Skip Welds
Rough Welds
Laminations
Gouges
Sharp corners and edges
Sharp bends or angles
The pre-cleaning methods below are defined under which standard?
Solvent wipe with cloth or rag
Immersion of substrate in solvent
Solvent spray
Steam cleaning
Emulsion cleaning
Chemical paint stripping
Alkaline cleaners
SSPC-SP 1
What should the inspector be aware of when using petroleum based mineral spirits?
A. Saponification
B. Dissolving too much oil & grease
C. LEL and TLV
D. Crushed Slag
C. Flash Point (LEL) and Threshold Limit Values (TLV)
Common Hand tool cleaning standards are_____
SELECT ALL THAT APPLY:
A. SSPC-SP 2 B. SSPC-SP 3 C. SSPC-SP 11 D. ISO 8501 St 2 E. ISO 8501 Sa 3 F. ISO 8501 St 3 G. ISO 8501 Sa 2
A. SSPC-SP2
D. ISO 8501 St 2
F. ISO 8501 St 3
A common standard used for solvent cleaning is:
A. SSPC-SP 2
B. ISO 8501-1
C. SSPC-SP 1
D. SSPC-VIS 1
C. SSPC-SP 1
Common Power tool cleaning standards are ____
SELECT ALL THAT APPLY:
A. NACE 1/SSPC-SP 5 B. SSPC-SP 3 C. SSPC-SP 11 D. SSPC-PA 2 E. SSPC-SP 15 F. ISO 8501 St 2 G. ISO 8501 Sa 2 1/2 H. ISO 8501 St 3 I. SSPC-VIS 3
B. SSPC-SP 3 C. SSPC-SP 11 E. SSPC- SP 15 F. ISO 8501 St 2 H. ISO 8501 St 3 I. SSPC-VIS 3
What are some methods of Abrasive Blasting?
Centrifugal Sand-injected water blast slurry blast wet abrasive blast dry grit blast cleaning (air blasting)
What are the (2) types of abrasive blasting hoses?
Four ply
Two ply
What type of abrasive blasting hose do you used when the hose is subject to external abuse or when there is danger of the operator pulling it at a right angle?
A. Two ply
B. Four ply
B. Four ply
What is the rule of thumb when choosing abrasive blasting hose size? The hose ID should be ______ times the size of nozzle orifice.
A. 2-3 times
B. 4-5 times
C. 3-4 times
D. 2 times
C. 3-4 times
What are some common types of abrasives?
Crushed slag
Naturally occurring mineral grit
ceramic grit
Commonly observed rules indicate a maximum delay of ______ after blasting and require that if visible deterioration has occurred, surface shall be retreated.
A. 2 hr
B. 4 hr
C. 1 hr
D. 5 hr
B. 4 hr