Surface Prep

Question 1

Proper surface preparation is necessary for

Answer 1

Adequate bonding of coating
full protection of substrate
avoiding early paint failure

Question 2

which of the following presents the least coating problem

Answer 2

surface texture

Question 3

what is a consideration in determining the best method of surface preparation

Answer 3

-generic type of coating
-type of substrate
-type of environment presetn

Question 4

which of the following will cause loss of adhesion on a surface to be coated

Answer 4

-loosepaint chalk
-rust
-oil

Question 5

pinpoint rusting of recently coated steel is frequently related to

Answer 5

too high a surface profile

Question 6

which of the following surface preparation systems pose a health or safety hazard

Answer 6

-abrasive blasting
-flame cleaning
-solvent cleaning

Question 7

oil and grease are best removed from steel by

Answer 7

solvent washing or steam cleaning

Question 8

hand tool cleaning effectively removes from steel

Answer 8

loose paint or rust

Question 9

inhibitors are used in wet or water blasting of steel to

Answer 9

prevent flashing rusting

Question 10

abrasive blasting

Answer 10

is best when a high level of surface preparation is required

Question 11

what are the best methods for removing contaminants

Answer 11

hand power tool-loose mill scale, rust and paint
solvent cleaning-oil and grease
water blasting-marine growth and loose chalk
abrasive cleaning-all rust and mill scale

Question 12

what method of solvent cleaning is more effective than the rag or brush scrubbing method

Answer 12

immersion method

Question 13

when is it most advantageous to use steel grit or shot for abrasive cleaning

Answer 13

when cleaning ferrous metals

Question 14

What additive is blended with teh wet sand to prevent rusting while wet blasting

Answer 14

rust inhibitors

Question 15

what are the main advantages of wet blasting

Answer 15

reduces the dust

Question 16

in order to prevent discoloration of latex paint on a masonry surface, what preparation must be accomplished before painting

Answer 16

all alkalinity must be neutalized

Question 17

what procedure is used for removing grease oil soil and other contaminants from steel surfaces manually

Answer 17

solvent cleaning

Question 18

what type of blasting system is used for removal of paint marking from concrete paving

Answer 18

the portable abrasive blaster

Question 19

what is the minimum allowable flash point for solvent used for surface cleaning

Answer 19

100 degrees F

Question 20

what problems are created for the painter when steel is coated with zinc metal and chemical treatment that prevents corrosion

Answer 20

adhesion of coatings after exposure

Question 21

what is white rust? when is it encountered

Answer 21

white deposit on zinc when in humid area

Question 22

what blast cleaning method is considered to provide a high degree of cleaning for paoint systems under normal exposure conditions

Answer 22

commercial blast

Question 23

which method of abrasive cleaning is used for cleaning loose paint from masonry

Answer 23

commercial

Question 24

what type of mateial is most often cleaned by the blat method

Answer 24

metal

Question 25

when the maximum performance is required from a pain system, what type of blast system is called for

Answer 25

white metal blast

Question 26

which of the following powdered abrasives is best for all around use

Answer 26

pumice stone

Question 27

a major advantage of the use of power tools is

Answer 27

the reduced time in preparation substrate required

Question 28

what balst cleaning method should be sued to prepare the surface for coatings that are exposed to corrosive atmospheres

Answer 28

white metal blast

Question 29

when a power wire wheel is used for cleaning metal surfaces, why must polishing the surface be avoided

Answer 29

reduces the adhesive property for future coat

Question 30

a scaling hammer must not be used on plate heavier than one-fourth inch (t/f)

Answer 30

false

Question 31

what additional cleaning is required following a flame type cleaning of a painted surface

Answer 31

wire brushing

Question 32

when would a blast cleaning operation call for the use of sand as the abrasive particle

Answer 32

when grit is unavailable

Question 33

what is the dominant factor to be considered when selecting a grit for a particular blast cleaning job

Answer 33

the surface contamination to be removed

Question 34

what preparation should be made for painting corrosion resistant metals

Answer 34

minimum surface roughening

Question 35

what is one of the requirements when wet blasting is used

Answer 35

special hoses are necessary

Question 36

what degree of abrasive blast cleaning is the most time consuming

Answer 36

white metal

Question 37

when is the vacuum blast method most efficint and economical

Answer 37

when it is semi-open

Question 38

what type of blasting requires the surface to be vacuumed to remove grit residue

Answer 38

dry conventional blasting

Question 39

the terms vacuum blasting and dry honing are synonymous (T/F)

Answer 39

True

Question 40

what is another name for dry honing

Answer 40

vacuum blasting

Question 41

why do all blasted metal surfaces require prime painting be started and completed the same day

Answer 41

to prevent rust from forming upon the surface

Question 42

the reason extra care is taken in painting metal is

Answer 42

-to prevent rust -to be sure paint adheres

Question 43

iron is primed with blue lead, or zinc chromate properties in the primer to prevent rust (t/f)

Answer 43

true

Question 44

Excess moisture will cause

Answer 44

blistering and peeling

Question 45

what is the most important thing when doing a paint patch

Answer 45

surface preparation

Question 46

to finish paint grade wood, the first step is to

Answer 46

fill holes

Question 47

the most important thing to do before repainting is to

Answer 47

prepare the surface