Term
| types of liquid penetrant |
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Definition
I: fluorescent Dye
Type I more sensitive
II: Visible Color Dye |
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Term
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Definition
METHOD A: Water Washable
METHOD B: Lipophilic Post-Emulsifable
METHOD C: Solvent Removable
METHOD D: Hydrophilic Post-Emulsifable |
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Term
| Write out sensitivity levels |
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Definition
Sensitivity Level 1/2 - Very Low
Sensitivity Level 1 - Low
Sensitivity Level 2 - Medium
Sensitivity Level 3 - High
Sensitivity Level 4 – Ultrahigh |
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Term
| Which developer is most sensitive |
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Definition
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Term
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Definition
Dry developers
Fluffy chalk-like powder that is applied to dry test surfaces
NONAQUEOUS WET DEVELOPER
Suspension of absorptive white powder in a solvent vehicle.
Aerosol can
Only applied to dry surfaces
Most sensitive
AQUEOUS WET DEVELOPERS
Suspension of developer particles in a rapid drying solvent.
Applied before drying |
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Term
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Definition
| Fluffy chalk-like powder that is applied to dry test surfaces |
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Term
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Definition
Suspension of absorptive white powder in a solvent vehicle.
Aerosol can
Only applied to dry surfaces
Most sensitive |
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Term
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Definition
Suspension of developer particles in a rapid drying solvent.
Applied before drying |
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Term
| 3 classes of solvent removers |
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Definition
Class 1 – Halogenated.
Class 2 – Nonhalogenated.
Class 3 – Specific application |
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Term
| What wavelength do we measure black light with |
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Definition
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Term
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Definition
| least 1000 µm/cm^2 at the test surface. |
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Term
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Definition
| at the examination site of 100 fc (1000 Lx) |
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Term
| Definitions of flaw types |
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Definition
Continuous line- caused by cracks, cold shuts, forging laps, scratches, or die marks.
Internment line- Same discontinuities that cause continuous line indications may, under different circumstances, cause intermittent line indications.
- caused by cracks, cold shuts, forging laps, scratches, or die marks.
Round- usually porosity, porosity may be the result of gas holes, pin holes, or porous make up
Small dot- caused by pin holes, Porous nature of the article, or by excessively coarse grains being used in producing a casting.
Diffused or weak- difficult to interpret, may be lack of cleaning, may be surface porosity |
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Term
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Definition
| - caused by cracks, cold shuts, forging laps, scratches, or die marks |
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Term
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Definition
- Same discontinuities that cause continuous line indications may, under
different circumstances, cause intermittent line indications.
- caused by cracks, cold shuts, forging laps, scratches, or die marks. |
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Term
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Definition
| - usually porosity, porosity may be the result of gas holes, pin holes, or porous make up |
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Term
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Definition
| - caused by pin holes, Porous nature of the article, or by excessively coarse grains being used in producing a casting. |
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Term
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Definition
| difficult to interpret, may be lack of cleaning, may be surface porosity |
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Term
| 3 properties you need in penetrant |
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Definition
Viscosity
Capillary action-
Wetting Ability |
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Term
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Definition
- The resistance to flow of a fluid and the resistance to the movement of an object through a fluid
It does not effect the penetrating ability of the penetrant but it will affect the rate of penetration.
Generally very viscous liquids are unsuitable because they do not flow rapidly enough and therefore requires long periods to migrate into fine flaws. |
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Term
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Definition
- liquid rises into straw on its own
- The height the liquid rises is directly proportional to the surface tension of the liquid and to the cosine of the angle of contact
The height the liquid rises is inversely proportional to the density of the liquid and to the radius of the capillary tube.
The forces are also involved in the entry of a liquid into a crack.
-Reversed capillary action brings pen out of crack after surface has been cleaned |
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Term
| Wetting Ability is affected by |
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Definition
Contact angle-
Good wetting: <90deg
Poor wetting: = 90deg
No wetting: > 90 deg
Surface tension |
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Term
| Sensitivity levels apply to Type I or Type II? |
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Definition
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Term
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Definition
Combine with the penetrant so as to make the resultant mixture water washable.
Must have suitable dwell time |
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Term
| Advantages of florescent over visible |
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Definition
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Term
| Advantages of solvent light method over water washable |
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Definition
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Term
| what is in portable visible kit |
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Definition
Three cans and a rag- only
Solvent cleaner or penetrant remover.
Visible dye penetrant.
Nonaqueous wet developer.
Wiping cloths and brushes - Lint Free |
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Term
| unit of measurement for black light intensity |
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Definition
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Term
| All reasons for pre cleaning |
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Definition
| All paint, carbon, oil, varnish, oxide,plating, water, dirt,and coatings must be removed |
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Term
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Definition
Alkaline
Steam
Vapor Degrease
Solvent Wash
Acid Etch
Mechanical
Paint Stripper
Ultrasonic
Detergent |
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Term
| Excessive drying is not good because it reduces __________- one word |
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Definition
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Term
| What is penetrant dwell time and why is it nessasery |
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Definition
Dwell time- sufficient time is allowed for penetration into surface discontinuities after Application
Related to size and shape of discontinuities anticipated |
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Term
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Definition
| to become converted into soap. |
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Term
| How do you tell depth of indication? |
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Definition
You can’t with pen
Brighter indication can hint at it
Must use UT or RT |
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Term
| 3 types of indications 3 examples of each |
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Definition
Relevant- caused by a condition or discontinuity that requires evaluation
round
intermenent line
Continuous line
Non-relevant- caused by a condition or discontinuity that is not rejectable
loosely adherent scale- casting
rough surface due to burned-in sand.- casting
keyed- geometry
False- from a condition other than a discontinuity
Lint
Dirt
Poor washing of water-washable and post-emulsified penetrants |
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Term
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Definition
caused by a condition or discontinuity that requires evaluation
Continuous line
-caused by cracks, cold shuts, forging laps, scratches, or die marks.
round
- usually porosity, porosity may be the result of gas holes, pin holes, or
porous make up
difused or weak
-difficult to interpret, may be lack of cleaning, may be surface porosity
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Term
Non-relevant indications
definition and examples |
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Definition
caused by a condition or discontinuity that is not rejectable
loosely adherent scale- casting
rough surface due to burned-in sand.- casting
keyed- geometry |
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Term
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Definition
Lint
Dirt
Poor washing of water-washable and post-emulsified penetrants |
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Term
Pick out a method from the PowerPoint and writ out exactly every step
#, Letter and name
Exactly from PP |
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Definition
METHOD C – SOLVENT REMOVABLE
(TYPE II, VISIBLE)
CLEAN
AND DRY
(SKC-S Cleaner)
APPLY PENETRANT
(SKL-SP1 Spray-Can)
DWELL
30 MINUTES
OR
AS REQUIRED
WIPE CLEAN
APPLY NON-AQUEOUS DEVELOPER
(SKD-S2)
DWELL
INSPECTION
POST-CLEAN
(SKC-S Cleaner) |
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