COLORADO RADIOGRAPHIC TESTING TECHNICIAN
CERTIFICATION EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) Q&A 2026
|INSTANT DOWNLOAD PDF
1. What type of radiation is used in industrial radiographic
testing?
A. Alpha particles
B. Gamma rays and X-rays
C. Infrared waves
D. Sound waves
Rationale: Radiographic testing relies on penetrating
electromagnetic radiation.
Correct Answer: B. Gamma rays and X-rays
2. The main purpose of radiographic testing is to detect:
A. Surface color changes
B. Internal discontinuities
C. Electrical resistance
D. Magnetic fields
Rationale: RT reveals internal flaws not visible externally.
Correct Answer: B
3. Which property allows X-rays to penetrate materials?
,A. High density
B. Short wavelength and high energy
C. Low frequency
D. Magnetic force
Rationale: High-energy photons penetrate matter.
Correct Answer: B
4. Radiation exposure is measured in:
A. Ohms
B. Pascals
C. Sieverts or rem
D. Watts
Rationale: Dose units quantify biological effect.
Correct Answer: C
5. The device used to produce X-rays is called:
A. Geiger counter
B. X-ray tube
C. Dosimeter
D. Collimator
Rationale: X-ray tubes generate radiation electronically.
Correct Answer: B
6. Gamma rays in industrial radiography come from:
,A. Electrical generators
B. Radioactive isotopes
C. Sound vibration
D. Lasers
Rationale: Isotopes like Ir-192 emit gamma rays.
Correct Answer: B
7. A radiograph is best described as a:
A. Magnetic image
B. Visual image of internal structure
C. Sound wave pattern
D. Thermal map
Rationale: It is a shadow image of internal features.
Correct Answer: B
8. The darker areas on a radiograph indicate:
A. High density
B. Low density or more exposure
C. No radiation
D. Magnetic interference
Rationale: More radiation passes through thin areas.
Correct Answer: B
9. A discontinuity refers to:
, A. Smooth surface
B. Break in material structure
C. Paint defect
D. Temperature change
Rationale: Discontinuities are flaws in materials.
Correct Answer: B
10. Which is NOT a common RT discontinuity?
A. Porosity
B. Cracks
C. Weld slag
D. Electrical resistance
Rationale: Electrical resistance is not a defect type.
Correct Answer: D
11. Film radiography uses:
A. Sound waves
B. Photographic film
C. Magnetic sensors
D. Heat sensors
Rationale: Film captures radiation exposure.
Correct Answer: B
12. The function of a collimator is to:
CERTIFICATION EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) Q&A 2026
|INSTANT DOWNLOAD PDF
1. What type of radiation is used in industrial radiographic
testing?
A. Alpha particles
B. Gamma rays and X-rays
C. Infrared waves
D. Sound waves
Rationale: Radiographic testing relies on penetrating
electromagnetic radiation.
Correct Answer: B. Gamma rays and X-rays
2. The main purpose of radiographic testing is to detect:
A. Surface color changes
B. Internal discontinuities
C. Electrical resistance
D. Magnetic fields
Rationale: RT reveals internal flaws not visible externally.
Correct Answer: B
3. Which property allows X-rays to penetrate materials?
,A. High density
B. Short wavelength and high energy
C. Low frequency
D. Magnetic force
Rationale: High-energy photons penetrate matter.
Correct Answer: B
4. Radiation exposure is measured in:
A. Ohms
B. Pascals
C. Sieverts or rem
D. Watts
Rationale: Dose units quantify biological effect.
Correct Answer: C
5. The device used to produce X-rays is called:
A. Geiger counter
B. X-ray tube
C. Dosimeter
D. Collimator
Rationale: X-ray tubes generate radiation electronically.
Correct Answer: B
6. Gamma rays in industrial radiography come from:
,A. Electrical generators
B. Radioactive isotopes
C. Sound vibration
D. Lasers
Rationale: Isotopes like Ir-192 emit gamma rays.
Correct Answer: B
7. A radiograph is best described as a:
A. Magnetic image
B. Visual image of internal structure
C. Sound wave pattern
D. Thermal map
Rationale: It is a shadow image of internal features.
Correct Answer: B
8. The darker areas on a radiograph indicate:
A. High density
B. Low density or more exposure
C. No radiation
D. Magnetic interference
Rationale: More radiation passes through thin areas.
Correct Answer: B
9. A discontinuity refers to:
, A. Smooth surface
B. Break in material structure
C. Paint defect
D. Temperature change
Rationale: Discontinuities are flaws in materials.
Correct Answer: B
10. Which is NOT a common RT discontinuity?
A. Porosity
B. Cracks
C. Weld slag
D. Electrical resistance
Rationale: Electrical resistance is not a defect type.
Correct Answer: D
11. Film radiography uses:
A. Sound waves
B. Photographic film
C. Magnetic sensors
D. Heat sensors
Rationale: Film captures radiation exposure.
Correct Answer: B
12. The function of a collimator is to:
