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NACE > Tough ones > Flashcards

Tough ones Flashcards

0
Q

Hot dipped galvanizing usually consists of how many layers

A

3

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1
Q

What are the 3 steps of surface preparation for galvanization

A

Caustic cleaning
pickling
fluxing

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2
Q

With the pencil hardness test the ranges are from what to what?

A

6H to 6B

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3
Q

To determine the DFTs with a tooke Gage, what math must be done

A

Reticle divisions x retical resolution

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4
Q

For the plastic sheet method, how long should it be in place

A

16 hours

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5
Q

For the plastic sheet method, how large should be

A

18 X 18

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6
Q

ICRI PLATES ARE FOR WHAT

A

Concrete surface comparison

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7
Q

How exactly does salt increase the rate of corrosion

A

By increasing the efficiency of the Electrolyte

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8
Q

How can the surface profile of concrete be recorded

A

Replica putty

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9
Q

List three ways to smooth concrete and fill in voids

A

Stoning sacking and trowelling

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10
Q

Name the 3 types of anti-fouling coatings

A

Ablative
self smoothing
foul release

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11
Q

How far should the nozzle be from the surface when removing heavy rust scale for old coatings

A

2 inches

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12
Q

Does water jetting create an anchor profile

A

No

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13
Q

What are the 2 types of localize corrosion

A

Pidding

crevice

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14
Q

Which part of the corrosion cell are ions transferred

A

Electrolyte

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15
Q

What is the industry standard for holiday detection… Volts/mil?

A

100 V per mil

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16
Q

What two things does acid etching do

A

Removes laitence

Ruffins surface

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17
Q

What are the 3 steps for preparing to coat concrete

A

Pre-cleaning
surface prep
filling in voids

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18
Q

Is determining the correct hardness important for the inspection criteria of rubber lining

A

Yes

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19
Q

What is the transfer efficiency of electrostatic spray

A

98%

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20
Q

What are the 2 types of Plural component spray systems

A

Fixed ratio

adjustable ratio

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21
Q

What are the 4 methods of powder coating application

A

Electrostatic spray
fluidized bed
flame spray
Roto lining

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22
Q

What are the 2 categories of fireproof coatings

A

Passive

intumescent

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23
Q

What type of current is the corrosion current (AC or DC)

A

DC

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24
Q

In ohms law, DC currents are defined by what mathematical relationship

A

Volts = amps/ohms

25
Q

This type of coating defect happens when a hard coating is applied over a softer coating

A

Alligatoring

26
Q

What is another name for a coating “blushing”

A

Amine sweating

27
Q

Which salt test indicates the color blue for the presence of salt

A

Potassium ferricyanide

28
Q

What is the most commonly used application method for coatings

A

Airless spray

29
Q

At a minimum, inspection records should include what 2 things

A
  • Environmental conditions

- The work process from beginning to end

30
Q

The conductivity meter is used to measure the conductivity of a solution that contains what

31
Q

Which salt test can be measured using multiple methods

A

Bresle patch test

32
Q

Which 2 types of cures are non-convertible

A

Evaporation cure

Coalescence

33
Q

Describe SSPC PA 2 measurement method

A

3 readings within 1.5 inch circle (averaged)

5 of these readings within 100 ft.²

34
Q

What are the three general responsibilities of the inspector

A

Observe
report
document

35
Q

When using the tooke gauge, the cutting tip is determined by what?

A

Thickness of coating

36
Q

With the 10 X cutting tip, one retical division equals how many mils?

A

0.1 or a tenth of a mil

37
Q

With the 2X cutting tip, one reticle division equals how many mills?

A

0.5 or half a mil

38
Q

With the 1X cutting tip, one reticle division equals how many mils?

39
Q

What is the most commonly used acid etching?

A

Muratic acid (hydrochloric acid)

40
Q

At what percentage relative humidity does corrosion virtually cease?

41
Q

Concrete often passivates steel above what pH?

42
Q

All coatings are affected by what 2 things?

A

Time and temperature

43
Q

For NACE/SSPC standards, can magnifiers be used?

44
Q

Does electrostatic spray produce thicker coating on edges

45
Q

In which solution do you put the probe when you’re testing for pH

A

Aqueous solution

46
Q

Will an organic solvent clean off chloride, sulfides, and mill scale?

47
Q

If there are contaminants on the surface and you poor solvent on it to detect contaminants, what should it do?

A

Flow evenly and not break into droplets

48
Q

Should an oil based coating be on top of galvanization

49
Q

What can result from an oil based coating on top of an inorganic zinc coating?

A

Saponification

50
Q

Should a solvent-cure coating always be covered by a chemical cure coating?

51
Q

Do inorganic thinks I have a high heat resistance?

52
Q

What are VOC’s?

A

Volatile organic compounds

53
Q

Can epoxies be solvent-free for you?

54
Q

Does coalescence involve water evaporation?

55
Q

What is valence bonding?

A

Adhesion by polarity

56
Q

What is “volatility”?

A

The speed at which the solvent leaves the coating

57
Q

What is “solvency power”?

A

The ability to dissolve the resin

58
Q

Which environment is generally the most corrosive?

A

Chemical/marine

59
Q

Which environment is the least corrosive, generally?

60
Q

The primary responsibility of the inspector.

A

To enforce the specifications

61
Q

Organic coatings have less resistance to THIS compared to inorganic coatings.

NACE (4 decks)

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