RT Level III Practice Exam
.50 - ANS-Refer to specification 3.4 and 3.4.1 and fig 13. For a half inch thick weld joint,
what's the variety that should appear at the IQI?
.50 - ANS- Refer to a few.Four, three.4.1, and Figure 13 inside the specification. What
number should be displayed at the IQI for a weld joint that could be a thickness of 1/2 an
inch? 0.Half inch - ANS-Refer to specification, 3.Four. What penetrameter thickness would
be required for a 0.25 inch thick component?
0.Half inch - ANS-Refer to the specification, three.4. What penetrameter thickness could be
required for a zero.25 inch thick part?
0.1/2 inches - ANS-Given the specimen thickness is 1 inch, the supply size is 1/9 inch
diameter, and the SOD is 24 inches, what's the geometric unsharpness?
ANS-Film emulsions commonly have a thickness of 0.010 inches. 0.010-inch penetrameter
and zero.375-inch shim - ANS-If a 0.Five-inch-thick weld joint with a zero.375-inch backing
bar is to be radiographed according with the specification, what could be an appropriate
penetrameter and shim, if any, for that shot? 0.014 inch - ANS-What is the geometric
unsharpness of the picture of an object placed 2 inches under the source aspect surface (far
from the film) of a three inch thick take a look at obkect while rediographed with an eight mm
(zero.315 inch) focal spot at 24 i nches attention-to-film?
0.014 inch - ANS-What is the unsharpness of a discontinuity positioned 1 inch from the
lowest of a 3 inch thick element whilst a radiograph is shot with a 24 inch SFD and 0.0315
inch focal spot?
Zero.029 inch - ANS-When a radiograph is taken the use of a 24 inch SFD and a zero.315
inch focal spot, how unsharp is a discontinuity 2 inches from the lowest of a three inch
element? 0.0625 - ANS-Refer to specification. Fig eleven. Using X-ray the minimum size of
the hollow that will be detected will be _(blank)__ for a zero.Five inch thick part?
0.0625 for X-ray and zero.09375 for gamma ray - ANS-Refer to specification, fig eleven.
When analyzing a zero.Five inch thick part what are the minimum sizes of the 3T and 4T
holes?
Zero.09375 - ANS-Refer to specification, fig 11. For a zero.Five-inch-thick component, the
minimal size of the hole with the intention to be detected the usage of gamma rays is? 0.13 -
ANS-Given the publicity instances for the 0.25 and zero.45 inch shims for Material C in table
three the half of layer thickness for the fabric is __(blank)__
1.2 hr - ANS-How lengthy should you work in a place given an publicity price of thirteen.27
mR/hr in case you aren't allowed to obtain any greater than sixteen mR in step with day?
1.3 R/Ci - ANS-A Co60 source places out 1.3 R/hr in line with Ci at 1 m. After 10.6 years
the output per Ci of a 70 Ci source can be __(blank)__. "Read what it's far soliciting for
cautiously"
1.Ninety seven - ANS-How may additionally HVLs are represented by means of zero.375
inches of lead while using an lr192 supply?
One thousand KV - ANS-Which of the subsequent might reason the least unsharpness?
2 inch - ANS-Refer to desk 1. An exposure chart for steel at the equal KV is used to shoot a
layer of zirconium that is one inch thick at 220 KV. What thickness might be used on the
chart to determine the required publicity?
, At 220 KV, a 1 inch thick Zirconium element made from 2 inches of metal could be shot in
the same way as __(clean)__. 2.12 toes - ANS-It is desired to double the publicity of a
radiograph by means of converting focal movie distance. What will the brand new distance
be, assuming that the initial distance become 3 toes? 2.Three - ANS-If one hundred ft-c of
light is hitting a movie and best 0.5 toes-c passes via, what is the density if the movie?
210 ft - ANS-Refer to Figure 10. If the concrete barrier become no longer gift, how far
would someone have to stand from the source before the radiaition stage would be
decreased to 2 mR/hr?
250 kV - ANS-What is the maximum endorsed kV that ought to be used within the pinhole
projection technique of measuring focal spot size?
3.75 inches of lead - ANS- To lessen the intensity of a 10 Ci Co-60 supply to seventy five
mR/hr at 1 m, the quantity of defensive required could be about: 32 instances - ANS-A 20
curie cobalt 60 source is used for an exposure at 1 m. What exposure might be had to reap
the same degree of darkening on the movie 5.Three years later at a distance of four m?
Four.22 R/hr - ANS-How many R/hr may be predicted at a film located four m from Co-60
source after 5.3 years? The authentic pastime of the source turned into 100Ci.
400 kV - ANS-What supply would be used when performing radiography on a 5 inch
aluminum weld?
4T - ANS-A 2-T designation method the hole size is __(clean)__
5500 A - ANS-Fluoroscopic screens are typically covered with phosphors which includes
zinc sulfide or zinc cadmium sulfide, which produce seen yellow-green light with a
wavelength of about:
ninety% - ANS-What is the distinction in film density among a three.0 to a 2.Zero?
A approach for figuring out the depth of a discontinuity within a specimen - ANS-The time
period parallax is commonly utilized in radiography with regard to
A panoramic publicity - ANS-A approach that is generally used for big diameter pipes
whereby a whole circumferential weld can be radiographed in a single publicity is called:
A TLD - ANS-The maximum accurate manner to display publicity of employees is with
__(blank)__
The time period "afterglow" refers to ANS-Delayed luminescence or the persistence of a
phosphor below fluorescence. Aid in interpretation - ANS-Grinding the crown off a weld
would be finished to __(blank)__
Alpha debris - ANS-Which of the following might now not be used for thickness gauging?
Alpha, beta, and neutrons - ANS-Which of the following have mass and weight and are
components of radiation?
An amorphous, noncrystalline film of selenium - ANS-The photoconductor utilized in
xeroradiographic X-ray image systems is;
Anitomy - ANS-Lead displays are alloyed with __(blank)__ to cause them to more inflexible.
Number of atoms, density, and thickness of the specimen - ANS-The absorption of gamma
rays from a specific source once they pass via be counted is encouraged through:
Autoradiography - ANS-In the nuclear subject, it is from time to time important to decide fuel
distribution inside a given gas detail. This can be achieved by means of placing radiographic
film in touch with the gasoline element ensuing in exposure of the film to radioactivity. This
system is known as:
due to the movie's moisture or condensation, which can reason radiographic artifacts. ANS:
Why is it essential to convey a refrigerated movie package up to room temperature earlier
than establishing it? Become fogged - ANS-Films that stay between lead monitors to lengthy
in high temperatures and high humidity can also:
.50 - ANS-Refer to specification 3.4 and 3.4.1 and fig 13. For a half inch thick weld joint,
what's the variety that should appear at the IQI?
.50 - ANS- Refer to a few.Four, three.4.1, and Figure 13 inside the specification. What
number should be displayed at the IQI for a weld joint that could be a thickness of 1/2 an
inch? 0.Half inch - ANS-Refer to specification, 3.Four. What penetrameter thickness would
be required for a 0.25 inch thick component?
0.Half inch - ANS-Refer to the specification, three.4. What penetrameter thickness could be
required for a zero.25 inch thick part?
0.1/2 inches - ANS-Given the specimen thickness is 1 inch, the supply size is 1/9 inch
diameter, and the SOD is 24 inches, what's the geometric unsharpness?
ANS-Film emulsions commonly have a thickness of 0.010 inches. 0.010-inch penetrameter
and zero.375-inch shim - ANS-If a 0.Five-inch-thick weld joint with a zero.375-inch backing
bar is to be radiographed according with the specification, what could be an appropriate
penetrameter and shim, if any, for that shot? 0.014 inch - ANS-What is the geometric
unsharpness of the picture of an object placed 2 inches under the source aspect surface (far
from the film) of a three inch thick take a look at obkect while rediographed with an eight mm
(zero.315 inch) focal spot at 24 i nches attention-to-film?
0.014 inch - ANS-What is the unsharpness of a discontinuity positioned 1 inch from the
lowest of a 3 inch thick element whilst a radiograph is shot with a 24 inch SFD and 0.0315
inch focal spot?
Zero.029 inch - ANS-When a radiograph is taken the use of a 24 inch SFD and a zero.315
inch focal spot, how unsharp is a discontinuity 2 inches from the lowest of a three inch
element? 0.0625 - ANS-Refer to specification. Fig eleven. Using X-ray the minimum size of
the hollow that will be detected will be _(blank)__ for a zero.Five inch thick part?
0.0625 for X-ray and zero.09375 for gamma ray - ANS-Refer to specification, fig eleven.
When analyzing a zero.Five inch thick part what are the minimum sizes of the 3T and 4T
holes?
Zero.09375 - ANS-Refer to specification, fig 11. For a zero.Five-inch-thick component, the
minimal size of the hole with the intention to be detected the usage of gamma rays is? 0.13 -
ANS-Given the publicity instances for the 0.25 and zero.45 inch shims for Material C in table
three the half of layer thickness for the fabric is __(blank)__
1.2 hr - ANS-How lengthy should you work in a place given an publicity price of thirteen.27
mR/hr in case you aren't allowed to obtain any greater than sixteen mR in step with day?
1.3 R/Ci - ANS-A Co60 source places out 1.3 R/hr in line with Ci at 1 m. After 10.6 years
the output per Ci of a 70 Ci source can be __(blank)__. "Read what it's far soliciting for
cautiously"
1.Ninety seven - ANS-How may additionally HVLs are represented by means of zero.375
inches of lead while using an lr192 supply?
One thousand KV - ANS-Which of the subsequent might reason the least unsharpness?
2 inch - ANS-Refer to desk 1. An exposure chart for steel at the equal KV is used to shoot a
layer of zirconium that is one inch thick at 220 KV. What thickness might be used on the
chart to determine the required publicity?
, At 220 KV, a 1 inch thick Zirconium element made from 2 inches of metal could be shot in
the same way as __(clean)__. 2.12 toes - ANS-It is desired to double the publicity of a
radiograph by means of converting focal movie distance. What will the brand new distance
be, assuming that the initial distance become 3 toes? 2.Three - ANS-If one hundred ft-c of
light is hitting a movie and best 0.5 toes-c passes via, what is the density if the movie?
210 ft - ANS-Refer to Figure 10. If the concrete barrier become no longer gift, how far
would someone have to stand from the source before the radiaition stage would be
decreased to 2 mR/hr?
250 kV - ANS-What is the maximum endorsed kV that ought to be used within the pinhole
projection technique of measuring focal spot size?
3.75 inches of lead - ANS- To lessen the intensity of a 10 Ci Co-60 supply to seventy five
mR/hr at 1 m, the quantity of defensive required could be about: 32 instances - ANS-A 20
curie cobalt 60 source is used for an exposure at 1 m. What exposure might be had to reap
the same degree of darkening on the movie 5.Three years later at a distance of four m?
Four.22 R/hr - ANS-How many R/hr may be predicted at a film located four m from Co-60
source after 5.3 years? The authentic pastime of the source turned into 100Ci.
400 kV - ANS-What supply would be used when performing radiography on a 5 inch
aluminum weld?
4T - ANS-A 2-T designation method the hole size is __(clean)__
5500 A - ANS-Fluoroscopic screens are typically covered with phosphors which includes
zinc sulfide or zinc cadmium sulfide, which produce seen yellow-green light with a
wavelength of about:
ninety% - ANS-What is the distinction in film density among a three.0 to a 2.Zero?
A approach for figuring out the depth of a discontinuity within a specimen - ANS-The time
period parallax is commonly utilized in radiography with regard to
A panoramic publicity - ANS-A approach that is generally used for big diameter pipes
whereby a whole circumferential weld can be radiographed in a single publicity is called:
A TLD - ANS-The maximum accurate manner to display publicity of employees is with
__(blank)__
The time period "afterglow" refers to ANS-Delayed luminescence or the persistence of a
phosphor below fluorescence. Aid in interpretation - ANS-Grinding the crown off a weld
would be finished to __(blank)__
Alpha debris - ANS-Which of the following might now not be used for thickness gauging?
Alpha, beta, and neutrons - ANS-Which of the following have mass and weight and are
components of radiation?
An amorphous, noncrystalline film of selenium - ANS-The photoconductor utilized in
xeroradiographic X-ray image systems is;
Anitomy - ANS-Lead displays are alloyed with __(blank)__ to cause them to more inflexible.
Number of atoms, density, and thickness of the specimen - ANS-The absorption of gamma
rays from a specific source once they pass via be counted is encouraged through:
Autoradiography - ANS-In the nuclear subject, it is from time to time important to decide fuel
distribution inside a given gas detail. This can be achieved by means of placing radiographic
film in touch with the gasoline element ensuing in exposure of the film to radioactivity. This
system is known as:
due to the movie's moisture or condensation, which can reason radiographic artifacts. ANS:
Why is it essential to convey a refrigerated movie package up to room temperature earlier
than establishing it? Become fogged - ANS-Films that stay between lead monitors to lengthy
in high temperatures and high humidity can also:
