ASNT Level II Radiographic Testing (RT)
Certification Exam Practice Questions
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1. Which of the following best describes the primary purpose of
Radiographic Testing (RT) in nondestructive examination?
A. To measure electrical conductivity variations in metallic materials
B. To detect internal discontinuities using penetrating radiation and film or
digital imaging
C. To determine surface hardness using indentation methods
D. To evaluate magnetic field leakage at discontinuities
B. The primary purpose of Radiographic Testing is to use X-rays or gamma
rays to penetrate materials and produce an image that reveals internal
discontinuities such as voids, cracks, and inclusions, making it effective for
volumetric inspection of components.
2. In RT, which type of radiation is most commonly used for field
inspections involving thick steel structures?
A. Infrared radiation
B. Alpha particles
,C. Gamma radiation from radioisotopes
D. Ultraviolet radiation
C. Gamma radiation from radioisotopes is commonly used in field
inspections because it is highly penetrating, portable, and does not require
electrical power, making it suitable for thick steel structures.
3. What is the main function of an intensifying screen in film
radiography?
A. To reduce geometric unsharpness
B. To increase film density by converting X-ray energy into visible light
C. To eliminate scatter radiation completely
D. To measure radiation dose directly
B. Intensifying screens improve radiographic efficiency by converting X-ray
photons into visible light, which reduces exposure time and increases film
density.
4. Which factor most directly affects radiographic image contrast?
A. Source-to-film distance only
B. Object thickness and material density differences
C. Type of film cassette only
D. Exposure time alone
B. Radiographic contrast is primarily influenced by differences in material
thickness and density, which affect how much radiation is absorbed or
transmitted through the specimen.
5. What does geometric unsharpness in radiography refer to?
A. Blur caused by film development errors
B. Image distortion due to scattered radiation only
C. Loss of definition due to finite focal spot size and geometry
D. Reduced contrast from excessive exposure
, C. Geometric unsharpness occurs because the radiation source has a finite
focal spot size, causing penumbra and loss of image sharpness depending
on source, object, and detector geometry.
6. Which safety principle is fundamental in radiographic operations?
A. Maximum permissible dose
B. ALARA (As Low As Reasonably Achievable)
C. Minimum exposure time rule
D. Radiation amplification principle
B. The ALARA principle ensures radiation exposure is kept as low as
reasonably achievable through time, distance, and shielding controls.
7. What is the purpose of an Image Quality Indicator (IQI) in radiography?
A. To calibrate radiation output
B. To measure radiation intensity
C. To verify radiographic sensitivity and image quality
D. To detect surface cracks only
C. IQIs are used to verify radiographic quality by demonstrating that the
image has sufficient sensitivity to detect small discontinuities.
8. Which discontinuity is most likely to appear as a dark, elongated
indication on a radiograph?
A. Gas porosity
B. Slag inclusion
C. Crack
D. Tungsten inclusion
C. Cracks typically appear as dark, sharp, linear indications because they
create thin regions of high radiation transmission.
Certification Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationale 2026 Q&A| Instant
Download Pdf
1. Which of the following best describes the primary purpose of
Radiographic Testing (RT) in nondestructive examination?
A. To measure electrical conductivity variations in metallic materials
B. To detect internal discontinuities using penetrating radiation and film or
digital imaging
C. To determine surface hardness using indentation methods
D. To evaluate magnetic field leakage at discontinuities
B. The primary purpose of Radiographic Testing is to use X-rays or gamma
rays to penetrate materials and produce an image that reveals internal
discontinuities such as voids, cracks, and inclusions, making it effective for
volumetric inspection of components.
2. In RT, which type of radiation is most commonly used for field
inspections involving thick steel structures?
A. Infrared radiation
B. Alpha particles
,C. Gamma radiation from radioisotopes
D. Ultraviolet radiation
C. Gamma radiation from radioisotopes is commonly used in field
inspections because it is highly penetrating, portable, and does not require
electrical power, making it suitable for thick steel structures.
3. What is the main function of an intensifying screen in film
radiography?
A. To reduce geometric unsharpness
B. To increase film density by converting X-ray energy into visible light
C. To eliminate scatter radiation completely
D. To measure radiation dose directly
B. Intensifying screens improve radiographic efficiency by converting X-ray
photons into visible light, which reduces exposure time and increases film
density.
4. Which factor most directly affects radiographic image contrast?
A. Source-to-film distance only
B. Object thickness and material density differences
C. Type of film cassette only
D. Exposure time alone
B. Radiographic contrast is primarily influenced by differences in material
thickness and density, which affect how much radiation is absorbed or
transmitted through the specimen.
5. What does geometric unsharpness in radiography refer to?
A. Blur caused by film development errors
B. Image distortion due to scattered radiation only
C. Loss of definition due to finite focal spot size and geometry
D. Reduced contrast from excessive exposure
, C. Geometric unsharpness occurs because the radiation source has a finite
focal spot size, causing penumbra and loss of image sharpness depending
on source, object, and detector geometry.
6. Which safety principle is fundamental in radiographic operations?
A. Maximum permissible dose
B. ALARA (As Low As Reasonably Achievable)
C. Minimum exposure time rule
D. Radiation amplification principle
B. The ALARA principle ensures radiation exposure is kept as low as
reasonably achievable through time, distance, and shielding controls.
7. What is the purpose of an Image Quality Indicator (IQI) in radiography?
A. To calibrate radiation output
B. To measure radiation intensity
C. To verify radiographic sensitivity and image quality
D. To detect surface cracks only
C. IQIs are used to verify radiographic quality by demonstrating that the
image has sufficient sensitivity to detect small discontinuities.
8. Which discontinuity is most likely to appear as a dark, elongated
indication on a radiograph?
A. Gas porosity
B. Slag inclusion
C. Crack
D. Tungsten inclusion
C. Cracks typically appear as dark, sharp, linear indications because they
create thin regions of high radiation transmission.
