ASNT NDT Level III Radiographic Testing (RT)
Certification Examination
1. Why is Radiographic testing uses ionizing electromagnetic radiation to create
images that reveal internal conditions. important when applying the principles
tested in this examination?
A. Magnetic flux only
B. Audible sound
C. Ionizing electromagnetic radiation
D. Visible light only
Answer: C
Rationale: The correct answer is C because ionizing electromagnetic radiation
directly addresses the principle tested by this question. Option A is incorrect
because it does not best address the stated principle. Option B is incorrect because
it does not best address the stated principle. Option C is correct. Option D is
incorrect because it does not best address the stated principle.
2. Why would selecting the correct approach to Radiation intensity decreases as it
passes through material because photons are absorbed or scattered. matter when
conditions become more demanding or abnormal?
A. Thermal expansion
B. Acoustic coupling
C. Absorption and scattering
D. Magnetic saturation
Answer: C
,Rationale: The correct answer is C because absorption and scattering directly
addresses the principle tested by this question. Option A is incorrect because it
does not best address the stated principle. Option B is incorrect because it does not
best address the stated principle. Option C is correct. Option D is incorrect because
it does not best address the stated principle.
3. Which statement best identifies the principal purpose or effect of Radiographic
image density is influenced by exposure, material thickness, composition, and
processing or detector response. in this field?
A. Exposure and material conditions
B. Pipe color only
C. Room temperature only
D. Operator height
Answer: A
Rationale: The correct answer is A because exposure and material conditions
directly addresses the principle tested by this question. Option A is correct. Option
B is incorrect because it does not best address the stated principle. Option C is
incorrect because it does not best address the stated principle. Option D is incorrect
because it does not best address the stated principle.
4. Where does Radiographic contrast describes differences in image density
between adjacent regions. have its most important effect within the process
described by this examination?
A. Sensor cable length
B. Image density differences
C. Film cassette weight
D. Pipe diameter only
,Answer: B
Rationale: The correct answer is B because image density differences directly
addresses the principle tested by this question. Option A is incorrect because it
does not best address the stated principle. Option B is correct. Option C is incorrect
because it does not best address the stated principle. Option D is incorrect because
it does not best address the stated principle.
5. Which concept is most directly described by the following situation in this exam
domain: Geometric unsharpness increases when source size is larger or
object-to-detector distance increases relative to source-to-object distance.?
A. Source size and geometry
B. Only room lighting
C. Only kVp
D. Only film chemistry
Answer: A
Rationale: The correct answer is A because source size and geometry directly
addresses the principle tested by this question. Option A is correct. Option B is
incorrect because it does not best address the stated principle. Option C is incorrect
because it does not best address the stated principle. Option D is incorrect because
it does not best address the stated principle.
6. Why is Magnification increases when the object is farther from the detector
relative to the source. important when applying the principles tested in this
examination?
A. Room humidity
B. Film brand
C. Lead letter size
, D. Object-detector geometry
Answer: D
Rationale: The correct answer is D because object-detector geometry directly
addresses the principle tested by this question. Option A is incorrect because it
does not best address the stated principle. Option B is incorrect because it does not
best address the stated principle. Option C is incorrect because it does not best
address the stated principle. Option D is correct.
7. Why is An image quality indicator provides evidence that required radiographic
sensitivity has been achieved. important when applying the principles tested in this
examination?
A. Radiation shielding
B. Exposure timer
C. Film storage
D. Evidence of image quality
Answer: D
Rationale: The correct answer is D because evidence of image quality directly
addresses the principle tested by this question. Option A is incorrect because it
does not best address the stated principle. Option B is incorrect because it does not
best address the stated principle. Option C is incorrect because it does not best
address the stated principle. Option D is correct.
8. Which choice best represents the relationship between Source energy should be
selected considering material thickness, material type, required penetration, and
image quality. and the surrounding process or system?
A. Only room size
B. Material and image-quality requirements
Certification Examination
1. Why is Radiographic testing uses ionizing electromagnetic radiation to create
images that reveal internal conditions. important when applying the principles
tested in this examination?
A. Magnetic flux only
B. Audible sound
C. Ionizing electromagnetic radiation
D. Visible light only
Answer: C
Rationale: The correct answer is C because ionizing electromagnetic radiation
directly addresses the principle tested by this question. Option A is incorrect
because it does not best address the stated principle. Option B is incorrect because
it does not best address the stated principle. Option C is correct. Option D is
incorrect because it does not best address the stated principle.
2. Why would selecting the correct approach to Radiation intensity decreases as it
passes through material because photons are absorbed or scattered. matter when
conditions become more demanding or abnormal?
A. Thermal expansion
B. Acoustic coupling
C. Absorption and scattering
D. Magnetic saturation
Answer: C
,Rationale: The correct answer is C because absorption and scattering directly
addresses the principle tested by this question. Option A is incorrect because it
does not best address the stated principle. Option B is incorrect because it does not
best address the stated principle. Option C is correct. Option D is incorrect because
it does not best address the stated principle.
3. Which statement best identifies the principal purpose or effect of Radiographic
image density is influenced by exposure, material thickness, composition, and
processing or detector response. in this field?
A. Exposure and material conditions
B. Pipe color only
C. Room temperature only
D. Operator height
Answer: A
Rationale: The correct answer is A because exposure and material conditions
directly addresses the principle tested by this question. Option A is correct. Option
B is incorrect because it does not best address the stated principle. Option C is
incorrect because it does not best address the stated principle. Option D is incorrect
because it does not best address the stated principle.
4. Where does Radiographic contrast describes differences in image density
between adjacent regions. have its most important effect within the process
described by this examination?
A. Sensor cable length
B. Image density differences
C. Film cassette weight
D. Pipe diameter only
,Answer: B
Rationale: The correct answer is B because image density differences directly
addresses the principle tested by this question. Option A is incorrect because it
does not best address the stated principle. Option B is correct. Option C is incorrect
because it does not best address the stated principle. Option D is incorrect because
it does not best address the stated principle.
5. Which concept is most directly described by the following situation in this exam
domain: Geometric unsharpness increases when source size is larger or
object-to-detector distance increases relative to source-to-object distance.?
A. Source size and geometry
B. Only room lighting
C. Only kVp
D. Only film chemistry
Answer: A
Rationale: The correct answer is A because source size and geometry directly
addresses the principle tested by this question. Option A is correct. Option B is
incorrect because it does not best address the stated principle. Option C is incorrect
because it does not best address the stated principle. Option D is incorrect because
it does not best address the stated principle.
6. Why is Magnification increases when the object is farther from the detector
relative to the source. important when applying the principles tested in this
examination?
A. Room humidity
B. Film brand
C. Lead letter size
, D. Object-detector geometry
Answer: D
Rationale: The correct answer is D because object-detector geometry directly
addresses the principle tested by this question. Option A is incorrect because it
does not best address the stated principle. Option B is incorrect because it does not
best address the stated principle. Option C is incorrect because it does not best
address the stated principle. Option D is correct.
7. Why is An image quality indicator provides evidence that required radiographic
sensitivity has been achieved. important when applying the principles tested in this
examination?
A. Radiation shielding
B. Exposure timer
C. Film storage
D. Evidence of image quality
Answer: D
Rationale: The correct answer is D because evidence of image quality directly
addresses the principle tested by this question. Option A is incorrect because it
does not best address the stated principle. Option B is incorrect because it does not
best address the stated principle. Option C is incorrect because it does not best
address the stated principle. Option D is correct.
8. Which choice best represents the relationship between Source energy should be
selected considering material thickness, material type, required penetration, and
image quality. and the surrounding process or system?
A. Only room size
B. Material and image-quality requirements
