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
What are some air supply issues that can lead to inadequate surface preparation?
inadequate air supply too small air hoses internal hose couplings badly designed machines too small piping on the machine compressed air lines not kept straight and short as possible
What are the types of centrifugal blasting units?
Roller tables dust collectors pre-heating ovens blast cabinets paint booths drying booths handling equipment
What are some examples of shot & grit abrasives?
Cast steel steel grit steel shot cast iron malleable iron
How do you test the size of an abrasive?
A. Blotter Test
B. Sieve test
C. Micrometer
D. Vial test
B. Sieve test
Which Standard describes how to conduct an abrasive sieve test?
A. ASTM D 4285
B. ASTM D 1730
C. NACE SP0178
D. ASTM C 136
D. ASTM C 136
When SSPC-PA 2 is specified, how do you determine the minimum number of test required?
To determine hte number of test required if hte surace area is greater than 1000 sq ft, use this formula
3 + [ (SFC AREA) - 1000) / 1000] = Number of test areas
Number of test areas X 5 = # of Spot Readings
Number of spot readings X 3 = # of gauge readings
How do you determine the cleanliness of an abrasive?
A. vial test
B. sieve test
C. baking soda
D. blotter test
A. vial test
How do you test air supply cleanliness?
A. vial test
B. sieve test
C. baking soda
D. blotter test
D. blotter test
ASTM D 4285 is the standard for
A. The preparation of aluminum and aluminum alloy surface for painting
B. The standard method for indicating oil or water in compressed air
C. Discontinuity (holiday) testing of new protective coatings on conductive substrates
D. Standard Test Methods for Field Measurement of Surface Profile of Blast Cleaned Steel
B. The standard method for indicating oil or water in compressed air
Waterjetting used abrasives and water.
A. True
B. False
B. False
Litmus & pH papers will not detect chlorides.
A. True
B. False
A. True
Ultra High Pressure waterjetting does not produce a surface profile.
A. True
B. False
A. True
What are the 3 types of water blasting?
Grit blasting with a shroud
sand injected water blast
slurry blast with grit/water mix
What are some potential issue stemming from adding inhibitors to waterjetting?
Inhibitor quantity
Inhibitor deposits
Inhibitor consistency
What are the most commonly used visual guides for waterjetting?
Select all that apply: A. NACE-VIS 4 B. SSPC-VIS 4 C. NACE-VIS 7 D. SSPC-VIS 7
B. SSPC-VIS 4
C. NACE-VIS 7
What are the most commonly used visual guides for water blasting?
Select all that apply: A. NACE-VIS 4 B. SSPC-VIS 5 C. SSPC-VIS 7 D. NACE-VIS 9
B. SSPC-VIS 5
D. NACE VIS 9
Name 3 methods used to measure surface profile
comparator and coupons
replica tape
dial gauge depth micrometer (profilometer)
Name the (2) types of replica tape and their thickness ranges
Coarse 20-64 um (0.8-2.5 mils)
Extra Coarse 38-115 (1.5-4.5 mils)
What are 4 ways to test the solution in a bresle patch?
Kitigawa tubes, the quantab method, titrators, conductivity meter
What are some test methods to determine if soluble salts are present?
Potassium ferricyanide bresle patch sleeve test soluble salts meter (elcometer) conductivity meter
What are the 3 main types of soluble salt contamination?
chlorides
sulfates
nitrates
When checking an elcometer’s accuracy what are the correction factors for both above and below 25C (77F)?
below -1.7%/C*
above +1/7%/C*
Electrical conductivity measurements indicate the total soluble salt content, but cannot indicate what specific salts are present.
A. True
B. False
A. True
What are a few vital things inspectors need to know when testing for soluble salts?
test method to use
frequency of tents
soluble salt limits to be accepted
specific salts to be tested
Good practice suggests applying at least 2 top coats over blast cleaned surfaces. An exception to this rule appears to be ______ primers, which tend to split when anchor profile exceeds about 63 um (2.5 mils)
inorganic zinc silicate
What are the standards for using replica tape?
ASTM D 4417 Method C
NACE SP0287
What are the standards for using profile gauge?
ASTM D 4417 Method B
SSPC PA-17
Rust Grade A: _____
A. Steel surfaces completely covered with adherent mill scale; little or no rust visible
B. Steel surface covered with both mill scale and rust
C. Steel surface completely covered with rust; little or no pitting visible
D. Steel surface completely covered with rust; pitting visible
A. Steel surfaces completely covered with adherent mill scale; little or no rust visible
Rust Grade B: _____
A. Steel surface completely covered with rust; little or no pitting visible
B. Steel surfaces completely covered with adherent mill scale; little or no rust visible
C. Steel surface completely covered with rust; pitting visible
D. Steel surface covered with both mill scale and rust
D. Steel surface covered with both mill scale and rust
Rust Grade C: _____
A. Steel surface covered with both mill scale and rust
B. Steel surfaces completely covered with adherent mill scale; little or no rust visible
C. Steel surface completely covered with rust; little or no pitting visible
D. Steel surface completely covered with rust; pitting visible
C. Steel surface completely covered with rust; little or no pitting visible
Rust Grade D: _____
A. Steel surface completely covered with rust; pitting visible
B. Steel surfaces completely covered with adherent mill scale; little or no rust visible
C. Steel surface covered with both mill scale and rust
D. Steel surface completely covered with rust; little or no pitting visible
A. Steel surface completely covered with rust; pitting visible