Quality Indicators And Enhancers Flashcards
What is the penetrometer designed to determine
Quality or sensitivity of the radiograph’s ability to detect printed defects
What does the penetrometer identify
The type of material and the approximate material thickness of part being inspected
What is the minimum Thickness of penetrometer
.005 inches
Penetrameter holes shall be true and normal to which surface?
The surface of the penetrometer
Tolerances on the penetrameter thickness and hole diameters shall be plus or minus what
+/- 10% or 1/2 thickness
minimum diameters for 1T, 2T, and 4T holes
1T hole = .010”
2T hole = .020”
4T hole = .040”
+/- 10%
Designed for penetrator thickness at .005 - .020”
Increments of .0025”
.025” - .050” = increments of ____
.005”
.060 - .160” = increments of ____
.010”
.180” and over = increments of ____
.020”
Quality 1,2, and 3
Q1 1.4%, sensitivity
Q2 2.0%, sensitivity
Q3 2.8% sensitivity
One penetrometer shall represent an area within which the radiographic density’s do not vary more than what or what from the resolution of the penetrometer
+30% or -15%
Penetrometers are not required when what
- Examining assemblies for debris.
- defect removal or grind out
- Material details, contrast between two or more metals, honeycomb, fabrication irregularities, presence or absence of material
- Electronic components
- Inaccessible surfaces
Penetrometers blocks are made of material having the same what and approximately the same what is the part of being radiographed
Radiographic absorption and the same thickness
What are five quality enhancers
Potter Bucky Grid. Cones. Filters. Masking. Intensification screens
Which quality enhancer reduces radiation area to only the area necessary for exposure
Cones
What are three types of masks
Lead sheets.
Lead shots.
Lead salt solutions
Intensification screens are made of 94% what and 6% what
94% lead 6% antimony
The front screen of an intensification screen is usually how thick? Back screen?
Front .005”. back .010”
What to do intensification screens do
Intensifies primary radiation improves clarity by absorbing scatter radiation of longer wavelengths
What determines intensification screen thickness?
KV
How thick is the screen with a KV of less than 125
Thin front lead screen used to filter scatter radiation
How thick is the screen with a KV of 125-250 KV
Front .005”
back .010”
How thick is the screen with a KV range used of 250 KV to 400 KV
Front and back .010 inches
How thick is the screen in the MEV ranges
Front and back screens .050 inches
