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21 Cards in this Set
- Front
- Back
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RT- A lead symbol "B" for backscatter radiation shall have a minimum dimensions of? Where shall it be attached during exposure? |
1/2" height
1/16" thick
Shall be attached to the back of each film holder during exposure to determine backscatter radiation. |
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RT- what shall be used for judging film density? |
Either a densitometer or step wedge comparison. |
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RT- image quality indicators IQI shall be of what type? |
Hole type or wire type |
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RT- geometric unsharpness determination |
Ug= Fd/D (find in Art 2, T-274) |
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RT- location markers, what are they to appear as and where shall they be placed? |
Are to appear as radiographic images on film
Shall be placed on part, not on exposure holder / cassette |
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RT- for double wall viewing, at least _______ location marker shall be placed adjacent to weld for each radiograph. |
One |
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RT- IQI's shall be selected from what alloy material group or grade? |
From either the same alloy material group or grade as identified in SE-1025 or from an alloy material group or grade with less radiation absorption than the material being radiographed. |
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RT- Density limitations
Single film viewing X-ray and gamma ray?
Composite viewing of multiple film exposures min and maximum? Tolerances?
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Art 2, T-282.1
1.8 minimum for single film viewing with X-ray source
2.0 minimum for gamma ray source
1.3 - 4.0 composite viewing of multiple film with a tolerance 0.05. |
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RT- Excessive backscatter criteria. |
Light image of B on darker background- unacceptable
Dark image of B on lighter background- acceptable
No B- ideal |
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RT- IQI's are chosen based on the thickness being radiographed, this is done by? |
Using table T-276.1 |
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PT- prior to examination, the surface and all adjacent areas shall be dry and free of all dirt, grease, lint, scale, flux, spatter, paint, oil, etc within at least? |
1" |
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PT- the temperature of penetrant and surface of part shall not be below nor above? |
40F to 125F |
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PT- water washable, what is water pressure and temperature maximum? |
Shall not exceed 50psi and 110F |
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PT- Final interpretation shall be made within? |
10 to 60 min |
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PT- dwell times at temperature between what shall be doubled? |
40F to 50F |
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MT- prod spacing /current shall be? |
Direct or rectified shall be used
>= 3/4" thick shall be 100 to 125 amp/ in
< 3/4" thick shall be 90 to 110 amp/in |
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MT- black light shall be? |
1000 uW/cm2 on surface
Verified at least once every 8hrs or when work station is changed.
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UT- SE-797 practice provides guidelines for thickness measurement using contact pulse echo method at temperatures not to exceed? |
200F |
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UT- equation to calculate thickness T using UT measurement. |
T=Vt/2 |
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RT- from what type of material should shims be fabricated when they are to be used to radiograph welds? |
Fabricated of radiographically similar material to the object to be inspected. |
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VT- three different methods of conducting visual examination? |
Translucent, direct, remote visual. |
