Page | 1
IRRSP PRACTICE TEST 2025| BRAND NEW
ACTUAL EXAM WITH 100% VERIFIED
QUESTIONS AND CORRECT SOLUTIONS|
GUARANTEED VALUE PACK| ACE YOUR
GRADES.
1. Using a 50 Curie Iridium-192 source and a 3 HVL collimator,
what is the distance a radiographer must place the Restricted
area boundary?
a. 19 feet
b. 127 feet
c. 222 feet
d. 81 feet - correct answer - 127 feet
2. The primary reason over-exposures to radiography personnel
occur is due to:
(Answer with A, B, C, or D)
a. Insufficient training in the handling and use of radiation
exposure devices and x-ray generators
b. Malfunctions of exposure devices and associated
equipment or x-ray generators
c. Radiography personnel failing to perform required surveys
after radiographic exposures
d. Survey meter malfunctions - correct answer - C
, Page | 2
3. A Sievert is a unit of:
a. Activity
b. Radiation dose
c. Dose rate
d. Source focal size - correct answer - Radiation dose
4. During a radiographic exposure using a x-ray machine, the
radiographer is required to stop the exposure. What should he
do?
a. Ask the RSO for assistance
b. Turn the mA and kV controls back to zero
c. Turn the line switch OFF
d. Let the automatic timer run down to shut the generator OFF
- correct answer - Turn the line switch OFF
5. The use of 4 half value layers of shielding will reduce an
intensity by a factor of:
a. 4
b. 8
c. 16
d. 32 - correct answer - 16
6. A 40 Curie Iridium-192 source is approximately equal to:
(1 Ci = 37 Gbq)
a. 1480 GBq
, Page | 3
b. 10 GBq
c. 2 GBq
d. 10,480 GBq - correct answer - 1480 GBq
7. What is the process by which x-rays are produced in an
industrial x-ray machine?
a. Inelastic scatter
b. Absorption
c. Bremsstrahlung
d. Vapor recoil effect - correct answer - Bremsstrahlung
8. The process that results in the removal of orbital electrons from
atoms resulting in the formation of ion pairs:
a. Excitation
b. Radioactivity
c. Ionization
d. Thermalization - correct answer - Ionization
9. Which of the following is not a primary component for the
production of radiation when using x-ray machines?
(Answer with A, B, C, or D)
a. High voltage generator
b. X-ray control
c. Tube housing assembly
IRRSP PRACTICE TEST 2025| BRAND NEW
ACTUAL EXAM WITH 100% VERIFIED
QUESTIONS AND CORRECT SOLUTIONS|
GUARANTEED VALUE PACK| ACE YOUR
GRADES.
1. Using a 50 Curie Iridium-192 source and a 3 HVL collimator,
what is the distance a radiographer must place the Restricted
area boundary?
a. 19 feet
b. 127 feet
c. 222 feet
d. 81 feet - correct answer - 127 feet
2. The primary reason over-exposures to radiography personnel
occur is due to:
(Answer with A, B, C, or D)
a. Insufficient training in the handling and use of radiation
exposure devices and x-ray generators
b. Malfunctions of exposure devices and associated
equipment or x-ray generators
c. Radiography personnel failing to perform required surveys
after radiographic exposures
d. Survey meter malfunctions - correct answer - C
, Page | 2
3. A Sievert is a unit of:
a. Activity
b. Radiation dose
c. Dose rate
d. Source focal size - correct answer - Radiation dose
4. During a radiographic exposure using a x-ray machine, the
radiographer is required to stop the exposure. What should he
do?
a. Ask the RSO for assistance
b. Turn the mA and kV controls back to zero
c. Turn the line switch OFF
d. Let the automatic timer run down to shut the generator OFF
- correct answer - Turn the line switch OFF
5. The use of 4 half value layers of shielding will reduce an
intensity by a factor of:
a. 4
b. 8
c. 16
d. 32 - correct answer - 16
6. A 40 Curie Iridium-192 source is approximately equal to:
(1 Ci = 37 Gbq)
a. 1480 GBq
, Page | 3
b. 10 GBq
c. 2 GBq
d. 10,480 GBq - correct answer - 1480 GBq
7. What is the process by which x-rays are produced in an
industrial x-ray machine?
a. Inelastic scatter
b. Absorption
c. Bremsstrahlung
d. Vapor recoil effect - correct answer - Bremsstrahlung
8. The process that results in the removal of orbital electrons from
atoms resulting in the formation of ion pairs:
a. Excitation
b. Radioactivity
c. Ionization
d. Thermalization - correct answer - Ionization
9. Which of the following is not a primary component for the
production of radiation when using x-ray machines?
(Answer with A, B, C, or D)
a. High voltage generator
b. X-ray control
c. Tube housing assembly
