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NACE > Week 2 Quiz > Flashcards

Week 2 Quiz Flashcards

1
Q

The two broad classification for curing mechanisms are

A

convertible and non-convertible

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2
Q

the two non-convertible coating types are

A

chlorinated rubber and vinyl

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3
Q

the primary convertible coating curing mechanisms are

A

Oxidation, Co-reaction (polymerization), Hydration, and Fusion

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4
Q

The characteristics of oxidation cure coatings are

A

Not suitable for immersion service.
Not suitable for use over alkaline substrates.
Limited dry film thickness per coat.

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5
Q

List the coating types that cure by polymerization

A 
Epoxies
Polyurethanes
Polyureas
Polyaspartics
Polysiloxanies
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6
Q

Induction time is

A

The time required by the product data sheet (coatings manufacturer) between mixing the coating and the start of application.

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7
Q

What is the main requirement for a hydrolysis coating to cure?

A

Moisture

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8
Q

Industrial and marine coatings are commonly referred to by

A

Generic resin type

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9
Q

Oil based coatings applied over alkaline surfaces may result in

A

Saponification

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10
Q

List the formal sections usually contained in a good specification

A 
Scope of work
Terms and Conditions
Reference standards and codes
Safety
Pre-job conference
Surface preparation
Coating Materials (includes the coating schedule)
Sampling Coatings
Workmanship
Application
Work Schedule (sequence of work to be done)
Repairs and remedial coating work
Inspection
Documentation
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11
Q

What are two of the inspector’s responsibilities as it relates to the specification?

A

Verify the specification and not to make changes to the specification.

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12
Q

During the surface preparation, surface cleanliness should be inspected (as minimum) the following three times:

A

Before any surface preparation activities.
After surface preparation, before coating begins.
Between each application of coating in a multi-coat system.

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13
Q

Factors during surface preparation that may effect service life include:

A 
Residues of oil, grease, and soil
Residues of (non-visible) chemical salts
Rust on the surface
Loose or broken mill scale
Rust scale
Anchor pattern
Defects mechanical cleaning equipment
Surface condensation
Old coatings that may have poor adhesion or may be too deteriorated for recoating
Existing coatings that may be incompatible
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14
Q

Common design defects include

A

Hard-to-reach or inaccessible areas
Rivets, bolts, or other connectors
Welds
Gaps (particularly skip welds or surfaces close together)
Overlapping surfaces (e.g., roof plates in water tanks)
Angle iron badly oriented or in complex arrangements
Threaded areas
Dissimilar metals
Sharp edges, particularly on corners or rough cut plate
Construction aids

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15
Q

Common fabrication defects include

A

Weld Spatter
Skip Welds
Rough Welds
Sharp Corners & Edges

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16
Q

SSPC SP1 pre-cleaning methods include:

A 
Solvent wipe with cloth or rag
Immersion or the substrate in solvent
Solvent spray
Vapor degreasing
Steam cleaning
Emulsion cleaning
Chemical Paint Stripping
Use of alkaline cleaners
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17
Q

The standards for Power Tool Cleaning

A

SSPC-SP3
SSPC-SP 15
SSPC-SP11
ISO 8501-1, St2 or St3

18
Q

Tools used for Power Tool Cleaning are

A 
Rotary Wire Brushes
Impact tools
Needle Scaler
Rotary Scalers
Piston Scalers
Grinders and sanders
Disc Sanders
19
Q

Abrasive Blasting methods include

A 
Centrifugal blasting
Sand-injected water blast
Slurry blast
Wet abrasive blast
Dry grit Blast Cleaning (Air Blasting)
20
Q

Visual Standards for abrasive blasting include

A

SSPC-Vis 1

ISO 8501-1

21
Q

SSPC SP 10/NACE 2 limits staining to

A

5% per each unit area

22
Q

SSPC SP 5/NACE 1 limits staining to

A

0% per each unit area

23
Q

SSPC SP 6/NACE 3 limits staying to

A

33% per each unit area

24
Q

The two types of abrasive blasting nozzles include:

A

Straight

Venturi

25
Q

The specified level of surface cleanliness must be achieved and maintained

A

immediately prior to coatings application

26
Q

Advantages of centrifugal blast equipment include:

A

Dust and Fines are contained
Abrasives are easily recycled
Blasting and priming can be an inline operation
General overall economy compared to air blasting
No compressors, piping, or air handling equipment needed for wheel blasting

27
Q

The Inspectors checklist for surface preparation should include:

A 
Ambient conditions
Conditions of substrate
Pre-Blast surface cleanliness
Shot/Grit size selection
Shot/Grit Cleanliness
Abrasive Blasting Equipment
Surface Profile
Surface Cleanliness after abrasive blasting
Operator qualifications
Safety
28
Q

Abrasive media types include:

A 
Shot & Grit (metallic)
Crushed Slag
Ceramic Grit
Silica Sand
Garnet
Agricultural Abrasives
Specialty Abrasives
29
Q

Abrasive media typically used for recycling include:

A

Steel Shot

Steel Grit

30
Q

List the pressure ranges that categorize:

A

Low Pressure Water Cleaning: <34 MPa (5,000 psi)
High-Pressure Water Cleaning: 34 to 70 MPa (5,000 to 10,000 psi)
High-Pressure Water Jetting: 70 to 210 MPa (10,000 to 30,000 psi)
Ultrahigh=Pressure Water Jetting: >210 MPa (30,000 psi)

31
Q

Three types of Water-Blasting include:

A

Grit blasting with a shroud
Sand injected Water Blast
Slurry Blast with Grit/Water Mix

32
Q

The NACE/SSPC Waterjetting Standard is

A

SSPC/VIS 4 and VIS 7 are visual comparators to be used with the standard

33
Q

Three Test Methods for surface profile include:

A

Comparator and coupons
Replica tape
Digital Surface Profile Gauge

34
Q

Types of Soluble Salt Contamination include:

A

Chlorides
Sulfates
Nitrates

35
Q

If inspection is to be effective with regards to soluble salts, the specification should very clearly state:

A 
Limits to be accepted
Specific salts to be limited
Test method to be used
Frequency of testing
Locations in which tests should be administered
36
Q

Test for soluble salts include

A

Bresle Patch
Sleeve Test
Soluble Salt Meters
Conductivity Meters

37
Q

Depth of surface profile can be evaluated by several methods

A

ISO comparator
Replica Tape
Digital Profile Gauge

38
Q

The ISO Comparator grades may be recorded

A 
Finer-than-Fine Grade
Fine Grade
Medium Grade
Coarse Grade
Coarser-than-Coarse Grade
39
Q

The two types of replica tape are commonly used:

A

Coarse - for 20 to 64 um (0.8 to 2.5 mils)

X-Coarse - for 38 to 115 um (1.5 to 4.5 mils)

40
Q

List the standards for using the Replica tape

A

ASTM D 4417 Method C

NACE SP 0287-2002

41
Q

When using Replica tape common errors include:

A

Variation in the point-to-point over the surface being tested
The presence of particles of dirt on either the replica tape or gauge
Gauge Accuracy
The rubbing or burnishing technique

NACE (6 decks)

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