Practical Test Questions

Question 1

Tooke gauge non universal, what is the standard used

Answer 1

ASTM 4138 - measurement of dry film thickness of protective coating systems by destructive means (method A)

Question 2

Took gauge measurements range(s) for 1x

Answer 2

1 mil reticle and 20-100 mils max range

Question 3

Took gauge measurements range(s) for 2x

Answer 3

.5mil reticle and 3-20mil max range

Question 4

Tooke gauge measurements range(s) for 10x

Answer 4

0.1mil reticle and 0-3mils max range

Question 5

what dft gauge can be used for non metal coatings and substrate

Answer 5

UT-DFT gauge

Question 6

What standard is used for UT-DFT gauge?

Answer 6

ASTM D6132 - standard test method for nondestructive measurement of dry film thickness of applied organic coatings using an ultrasonic gauge

Question 7

What is the standard method for Pull-off Adhesion testing

Answer 7

ASTM D 4541 - standard Test method for pull off strength of coatings using portable adhesion testers

Question 8

Adhesion testing- what does cohesion failure mean?

Answer 8

Failure within a coating layer (the one coating itself failed) a,b,c,d, etc

Question 9

Adhesion testing- what does adhesion failure mean?

Answer 9

by the interfaces at which they occur, A/B, B/C, C/D, etc (whole coat fail to another or substrate

Question 10

Adhesion testing- max allotted time for continuous pressure?

Answer 10

100 seconds

Question 11

What is eddy-current DFT gauge used for

Answer 11

Non-ferrous metals- Aluminum, copper, Brass, and stainless steel.

Question 12

What standard is used for eddy-current DFT gauges?

Answer 12

SSPC-PA 2

Question 13

What standard should be used for barcol impressor?

Answer 13

ASTM D 2583, standard test method for indentation hardness or rigid plastic by means of barcol impressor

Question 14

What does a test with barcol impressor tell you

Answer 14

Indication of cure

Question 15

How to field verify calibration of barcol impressor?

Answer 15

Hard and soft alloy disks and glass disk given reading of 100.

Question 16

When using the barcoll impressor what phenomenon occurs

Answer 16

Cold flow, creep. Take reading before it occurs

Question 17

What is considered alkaline pH?

Answer 17

7.0 - 14.0 pH

Question 18

What is considered acidic pH?

Answer 18

0.0 - 7.0 pH

Question 19

What is considered neutral PH?

Answer 19

7.0 pH

Question 20

What is LP WC?

Answer 20

5,000 PSIG - power-washing (low-pressure water cleaning)

Question 21

What is HP WC?

Answer 21

5,000-10,000 PSIG - high pressure water cleaning

Question 22

What is HP WJ?

Answer 22

10,000 - 30,000 PSI ( high-pressure water jetting)

Question 23

What is UHP WJ?

Answer 23

Above 30,000 PSIG ( ultrahigh-waterjetting)

Question 24

What is nace WJ1

Answer 24

Clean to bare substrate, matte finish. free of all visible everything

Question 25

What is Nace WJ-2?

Answer 25

Very thorough cleaning - staining and tightly adherent material shall be limited to no more than 5% of each unit area surface

Question 26

What is Nace WJ-3?

Answer 26

Thorough cleaning - staining or tightly adherent matters shall be limited to 33%

Question 27

What is Nace WJ-4?

Answer 27

Light cleaning - residual material shall be tightly adherent to the metal substrate