RT Level III Practice Exam
.50 - ANS-Refer to specification 3.4 and 3.Four.1 and fig thirteen. For a 1/2 inch thick weld joint,
what's the number that need to seem on the IQI?
.50 - ANS-Refer to specification, three.4 and 3.Four.1 an fig 13. For a half inch thick weld joint,
what's the number that should appear on the IQI?
Zero.1/2 inch - ANS-Refer to specification, 3.4. What penetrameter thickness might be required
for a zero.25 inch thick component?
Zero.0.5 inch - ANS-Refer to the specification, three.4. What penetrameter thickness might be
required for a zero.25 inch thick component?
Zero.Half inches - ANS-Given the specimen thickness is 1 inch, the source length is 1/nine inch
diameter, and the SOD is 24 inches, what's the geometric unsharpness?
Zero.010 - ANS-Film emulsion thickness is generally __(blank)__ inch thick.
0.010 thick penetrameter and zero.375 inch shim - ANS-According to th e specification, given a
0.Five inch thick weld joint with a 0.375 inch backing bar in vicinity is to be radiographed, what
would be the best penetrameter and shim, if wished, for that shot?
Zero.014 inch - ANS-What is the geometric unsharpness of the photograph of an object placed
2 inches beneath the supply side floor (away from the movie) of a three inch thick take a look at
obkect while rediographed with an 8 mm (zero.315 inch) focal spot at 24 i nches
recognition-to-film?
Zero.014 inch - ANS-What is the unsharpness of a discontinuity located 1 inch from the lowest
of a 3 inch thick element while a radiograph is shot with a 24 inch SFD and 0.0315 inch focal
spot?
0.029 inch - ANS-What is the unsharpness of a discontinuity positioned 2 inches from the lowest
of a three inch part whilst a radiograph is shot with a 24 inch SFD and a zero.315 inch focal
spot?
0.0625 - ANS-Refer to specification. Fig 11. Using X-ray the minimum size of the hole that will
be detected shall be _(clean)__ for a 0.5 inch thick part?
0.0625 for X-ray and 0.09375 for gamma ray - ANS-Refer to specification, fig eleven. When
examining a zero.5 inch thick part what are the minimal sizes of the 3T and 4T holes?
, Zero.09375 - ANS-Refer to specification, fig eleven. Using gamma ray the minimal size of the
hole that shall be detected shall be __(clean)__ for a zero.Five inch thick component?
0.13 - ANS-Given the publicity times for the 0.25 and 0.Forty five inch shims for Material C in
desk 3 the 1/2 layer thickness for the fabric is __(blank)__
1.2 hr - ANS-How lengthy ought to you figure in an area given an exposure fee of 13.27 mR/hr if
you are not allowed to receive any extra than sixteen mR in step with day?
1.3 R/Ci - ANS-A Co60 supply places out 1.Three R/hr in line with Ci at 1 m. After 10.6 years
the output according to Ci of a 70 Ci source might be __(clean)__. "Read what it is asking for
carefully"
1.97 - ANS-How may additionally HVLs are represented by 0.375 inches of lead when using an
lr192 supply?
A thousand KV - ANS-Which of the subsequent would cause the least unsharpness?
2 inch - ANS-Refer to table 1. At 220 KV a one inch thick layer of zirconium is to be shot the
usage of an exposure chart for metallic at the identical KV. What thickness would be used on
the chart to determine the desired exposure?
2 inch of metal at 220 KV - ANS-A 1 inch thick Zirconium component might be shot the identical
way as __(clean)__
2.12 ft - ANS-It is favored to double the exposure of a radiograph by converting focal movie
distance. Assuming the unique distance to be 3 toes, what is going to the new distance be?
2.3 - ANS-If 100 toes-c of mild is hitting a movie and best zero.5 toes-c passes via, what's the
density if the movie?
210 feet - ANS-Refer to Figure 10. If the concrete barrier turned into no longer present, how far
might someone must stand from the supply before the radiaition level might be decreased to
two mR/hr?
250 kV - ANS-What is the most advocated kV that need to be used in the pinhole projection
approach of measuring focal spot size?
Three.Seventy five inches of lead - ANS-The shielding required to reduce the depth of a ten Ci
Co-60 source to 75 mR/hr at 1 m would be about:
.50 - ANS-Refer to specification 3.4 and 3.Four.1 and fig thirteen. For a 1/2 inch thick weld joint,
what's the number that need to seem on the IQI?
.50 - ANS-Refer to specification, three.4 and 3.Four.1 an fig 13. For a half inch thick weld joint,
what's the number that should appear on the IQI?
Zero.1/2 inch - ANS-Refer to specification, 3.4. What penetrameter thickness might be required
for a zero.25 inch thick component?
Zero.0.5 inch - ANS-Refer to the specification, three.4. What penetrameter thickness might be
required for a zero.25 inch thick component?
Zero.Half inches - ANS-Given the specimen thickness is 1 inch, the source length is 1/nine inch
diameter, and the SOD is 24 inches, what's the geometric unsharpness?
Zero.010 - ANS-Film emulsion thickness is generally __(blank)__ inch thick.
0.010 thick penetrameter and zero.375 inch shim - ANS-According to th e specification, given a
0.Five inch thick weld joint with a 0.375 inch backing bar in vicinity is to be radiographed, what
would be the best penetrameter and shim, if wished, for that shot?
Zero.014 inch - ANS-What is the geometric unsharpness of the photograph of an object placed
2 inches beneath the supply side floor (away from the movie) of a three inch thick take a look at
obkect while rediographed with an 8 mm (zero.315 inch) focal spot at 24 i nches
recognition-to-film?
Zero.014 inch - ANS-What is the unsharpness of a discontinuity located 1 inch from the lowest
of a 3 inch thick element while a radiograph is shot with a 24 inch SFD and 0.0315 inch focal
spot?
0.029 inch - ANS-What is the unsharpness of a discontinuity positioned 2 inches from the lowest
of a three inch part whilst a radiograph is shot with a 24 inch SFD and a zero.315 inch focal
spot?
0.0625 - ANS-Refer to specification. Fig 11. Using X-ray the minimum size of the hole that will
be detected shall be _(clean)__ for a 0.5 inch thick part?
0.0625 for X-ray and 0.09375 for gamma ray - ANS-Refer to specification, fig eleven. When
examining a zero.5 inch thick part what are the minimal sizes of the 3T and 4T holes?
, Zero.09375 - ANS-Refer to specification, fig eleven. Using gamma ray the minimal size of the
hole that shall be detected shall be __(clean)__ for a zero.Five inch thick component?
0.13 - ANS-Given the publicity times for the 0.25 and 0.Forty five inch shims for Material C in
desk 3 the 1/2 layer thickness for the fabric is __(blank)__
1.2 hr - ANS-How lengthy ought to you figure in an area given an exposure fee of 13.27 mR/hr if
you are not allowed to receive any extra than sixteen mR in step with day?
1.3 R/Ci - ANS-A Co60 supply places out 1.Three R/hr in line with Ci at 1 m. After 10.6 years
the output according to Ci of a 70 Ci source might be __(clean)__. "Read what it is asking for
carefully"
1.97 - ANS-How may additionally HVLs are represented by 0.375 inches of lead when using an
lr192 supply?
A thousand KV - ANS-Which of the subsequent would cause the least unsharpness?
2 inch - ANS-Refer to table 1. At 220 KV a one inch thick layer of zirconium is to be shot the
usage of an exposure chart for metallic at the identical KV. What thickness would be used on
the chart to determine the desired exposure?
2 inch of metal at 220 KV - ANS-A 1 inch thick Zirconium component might be shot the identical
way as __(clean)__
2.12 ft - ANS-It is favored to double the exposure of a radiograph by converting focal movie
distance. Assuming the unique distance to be 3 toes, what is going to the new distance be?
2.3 - ANS-If 100 toes-c of mild is hitting a movie and best zero.5 toes-c passes via, what's the
density if the movie?
210 feet - ANS-Refer to Figure 10. If the concrete barrier turned into no longer present, how far
might someone must stand from the supply before the radiaition level might be decreased to
two mR/hr?
250 kV - ANS-What is the most advocated kV that need to be used in the pinhole projection
approach of measuring focal spot size?
Three.Seventy five inches of lead - ANS-The shielding required to reduce the depth of a ten Ci
Co-60 source to 75 mR/hr at 1 m would be about:
