test questions to study for 14-17-18 Flashcards

1
Q

Dry film thickness matches up with

A

Applications

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2
Q

it is ______ to know surface conditions before preparation

A

important

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3
Q

how well just primer on the the steel be protected

A

it provides a corrosion free surface for the steel

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4
Q

SCAT stands for

A

surface contamination analysis test

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5
Q

it is t/f that baking soda is used as blasting material

A

true

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6
Q

t/f is coating specification a legal and enforceable document

A

true

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7
Q

t/f lead paint is dangerous

A

true

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8
Q

how does humidity effect life of coating

A

it shortens it. should not coat when relative humidity

below 5F or 3C

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9
Q

pinpoint corrosion is caused by

A

overspray

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10
Q

what does a contractor get out of the specifications

A

a clear understanding of the requirements of the specification

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11
Q

is writing a specification easy

A

no

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12
Q

is a good specification a guarantee against coating failure

A

no

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13
Q

is a specification for new construct same as for repair work

A

no there are more variables

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14
Q

does an application contractor help with developing specification

A

no

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15
Q

does a specification usually stipulate just one coating system

A

no 2 or more approved systems

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16
Q

should coating inspector attend pre-job meeting

17
Q

did osha and epa develop standards for coating specs

18
Q

who determines method for preparing the surface coating

A

the specifier

19
Q

what kind of failures are chalking, checking, and cracking

A

formulation- related failures

20
Q

does substrate have effect on coating performance

21
Q

examples of surface preparation

A
white metal blast cleaning
near white metal blast cleaning
commercial blast cleaning
acid pickling
brush off blast cleaning 
solvent cleaning
22
Q

application failures

A
poor workmanship
runs,sags, curtains
brush marks
improper coating thickness
overspray
pinholes
holidays
spatter coat
23
Q

where stripe coating is used

A

nuts bolts welds corners edges

construction aids

24
Q

what causes rapid coating failure

A
exterior forces :
chemical exposure
abrasion
reverse impact
severe weathering
25
formulation failure can cause
chalking checking cracking discoloration
26
checking failure
on surface only
27
what causes alligatoring
when a hard, tough coating is applied over a soft coating. | top coat shrinks and floats and bottom coat doesn't .
28
mud cracking
similar to alligatoring but reaches the substrate
29
what kind of coating prone to Biological attack
Organic (polyamide coating)
30
How many ways microorganisms affect the coating
Bacteria (use coating for food and derive energy from them) | Fungi (highly humid atomsphere; northern hemisphere on the north sides of tank and building surfaces)
31
what kind of rusting does overspray cause
pinpoint rusting
32
which surfaces are easier to coat new or old
new is easier
33
will other coatings work well over galvanized surface
no they will fail rapidly
34
does substrate have effect on coating performance
yes
35
sulfate contamination can cause ________ to substrate
pinpoint rusting
36
remaining pits after blasting
rust chlorides sulfides
37
blushing
haze deposit on surface. was exposed to moisture while curing