test questions to study for 14-17-18

Question 1

Dry film thickness matches up with

Answer 1

Applications

Question 2

it is ______ to know surface conditions before preparation

Answer 2

important

Question 3

how well just primer on the the steel be protected

Answer 3

it provides a corrosion free surface for the steel

Question 4

SCAT stands for

Answer 4

surface contamination analysis test

Question 5

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

Answer 5

true

Question 6

t/f is coating specification a legal and enforceable document

Answer 6

true

Question 7

t/f lead paint is dangerous

Answer 7

true

Question 8

how does humidity effect life of coating

Answer 8

it shortens it. should not coat when relative humidity

below 5F or 3C

Question 9

pinpoint corrosion is caused by

Answer 9

overspray

Question 10

what does a contractor get out of the specifications

Answer 10

a clear understanding of the requirements of the specification

Question 11

is writing a specification easy

Answer 11

no

Question 12

is a good specification a guarantee against coating failure

Answer 12

no

Question 13

is a specification for new construct same as for repair work

Answer 13

no there are more variables

Question 14

does an application contractor help with developing specification

Answer 14

no

Question 15

does a specification usually stipulate just one coating system

Answer 15

no 2 or more approved systems

Question 16

should coating inspector attend pre-job meeting

Answer 16

yes

Question 17

did osha and epa develop standards for coating specs

Answer 17

no

Question 18

who determines method for preparing the surface coating

Answer 18

the specifier

Question 19

what kind of failures are chalking, checking, and cracking

Answer 19

formulation- related failures

Question 20

does substrate have effect on coating performance

Answer 20

yes

Question 21

examples of surface preparation

Answer 21

white metal blast cleaning
near white metal blast cleaning
commercial blast cleaning
acid pickling
brush off blast cleaning 
solvent cleaning

Question 22

application failures

Answer 22

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

Question 23

where stripe coating is used

Answer 23

nuts bolts welds corners edges

construction aids

Question 24

what causes rapid coating failure

Answer 24

exterior forces :
chemical exposure
abrasion
reverse impact
severe weathering

Question 25

formulation failure can cause

Answer 25

chalking
checking
cracking
discoloration

Question 26

checking failure

Answer 26

on surface only

Question 27

what causes alligatoring

Answer 27

when a hard, tough coating is applied over a soft coating.

top coat shrinks and floats and bottom coat doesn’t .

Question 28

mud cracking

Answer 28

similar to alligatoring but reaches the substrate

Question 29

what kind of coating prone to Biological attack

Answer 29

Organic (polyamide coating)

Question 30

How many ways microorganisms affect the coating

Answer 30

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)

Question 31

what kind of rusting does overspray cause

Answer 31

pinpoint rusting

Question 32

which surfaces are easier to coat new or old

Answer 32

new is easier

Question 33

will other coatings work well over galvanized surface

Answer 33

no they will fail rapidly

Question 34

does substrate have effect on coating performance

Answer 34

yes

Question 35

sulfate contamination can cause ________ to substrate

Answer 35

pinpoint rusting

Question 36

remaining pits after blasting

Answer 36

rust
chlorides
sulfides

Question 37

blushing

Answer 37

haze deposit on surface. was exposed to moisture while curing