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Question 1 of 18
1. Question
According to Article 2 – Radiographic Examination of ASME V, the IQI or penetrameter selection shall be selected and based on:
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Question 2 of 18
2. Question
An excellent radiograph is obtained under given exposure conditions with a tube current of 3 mA and an exposure time of 12 minutes. If other conditions are not changed, what exposure time would be required if the X-ray tube current could be raised to 7 mA?
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Question 3 of 18
3. Question
According to Article 2 – Radiographic Examination of ASME V In film radiography, penetrameter or Wire IQIs for welds shall be placed :
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Question 4 of 18
4. Question
When performing Double Wall Technique, Double Wall Viewing, what are the necessary conditions to be applied:
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Question 5 of 18
5. Question
Using the Table T-276 of Article 2 ASME V. Determine the Hole Type Designation number (Film Side) if the base weld thickness 1.75” without reinforcement:
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Question 6 of 18
6. Question
In order to decrease geometric unsharpness:
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Question 7 of 18
7. Question
If an exposure time of 120 seconds was necessary using a 1.55 m (5 ft) source-to film distance for a particular exposure, what time would be necessary if a 0.6 m (2 ft) source-to-film distance is used and all other variables remain the same?
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Question 8 of 18
8. Question
With a given exposure time and kilovoltage, a properly exposed radiograph is obtained with a 5 mA-minutes exposure at the distance of 51 cm (20 in.). It is desired to increase the sharpness of detail in the image by increasing the source-to-film distance to 102 cm (40 in.). The correct milliamperage-minutes exposure to obtain the desired radiographic density at the increased distance is:
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Question 9 of 18
9. Question
Assuming that a good radiograph is obtained at a setting of 15 mA in 30 s, how much time will be necessary to obtain one equivalent radiograph if the milliamperage is changed to 5 mA (all other conditions remaining constant)?
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Question 10 of 18
10. Question
In making an isotope exposure in an unshielded area, you find the dose rate 1.8 m (6 ft) from the source is 2 500 mR/h. What would be the dose rate at 9.15 m (30 ft)?
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Question 11 of 18
11. Question
If initial activity of Ir-192 source is 75 Ci, what will be its activity after 3 months?
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Question 12 of 18
12. Question
Based on the absorbing capability, which of the following list concrete, lead, and steel in order of their effectiveness in providing shielding against radiation?
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Question 13 of 18
13. Question
A radiation level of 100 mR/h is noted at the perimeter of your posted high radiation area. . This perimeter is 25 cm (10 Ft) from the exposed source. Approximately how far away from the source should the radiation area signs be posted for the 2 mR/h line
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Question 14 of 18
14. Question
. If the rule of thumb is used as a minimum Source to film distance , calculate the geometric unsharpness if the source size is having a length of 2.5 mm and diameter of 1.5 mm , thickness of the test specimen is 5 in.
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Question 15 of 18
15. Question
Calculate the half life of a certain isotope if the activity original of the source is 63 Ci and become 3.94 Ci after 300 days has elapsed.
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Question 16 of 18
16. Question
An exposure technique is established to obtain a 2.0 density using type D film and automatic processing at 27 degrees Celsius. . In order to obtain comparable results using manual processing at 20 degrees and 5 minute development time, it would be necessary for the original exposure time to be
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Question 17 of 18
17. Question
A cobalt 60 was purchased 20 years ago which has an original activity of 53 curie. A weld that has a thickness of 5 inches is to be radiograph using the same source of radiation. How far should be the safe distance from the source unshielded in order to become permissible at 2 mR/h. (2.5 points)? Show your calculations.
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Question 18 of 18
18. Question
What is the necessary exposure time in order to radiograph the above specimen, assuming that the sensitivity requirement of 2% is met and the exposure factor of a film is .20 Ci-min/in2 using the rule of thumb for the minimum SFD? (1.5 points). Show your calculations
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