IRRSP Study Guide Questions and All
Correct Answers 2026 Updated.
CHAPTER 1
D. All the above - Answer 1. In the early years of Radiography, what caused personnel to be
overexposed?
A. Poor equipment design
B. Lack of understanding
C. Lack of and poor safety practices
D. All the above
D. Late in 1898 - Answer 2. In what year did Marie Curie discover Radium?
A. The beginning of 1896
B. The end of 1897
C. The beginning of 1898
D. Late in 1898
A. Marie and Pierre Curie - Answer 3. Who coined the term Radioactivity
A. Marie and Pierre Curie
B. Henry Becquerel
C. Ernest Rutherford
D. Wilhelm Roentgen
C. 3 in (7.62 cm) - Answer 4. In the early years of radiography from 1920-1930, the maximum
thickness that could be inspected via x-radiation was________ of steel?
A. 1 in. (2.54cm)
B. 2 in. (5.08 cm)
C. 3 in. (7.62 cm)
D. 10 in. (25.4 cm)
,D. All of the above - Answer 5. Historically, it has been proven that the predominant cause of
overexposure is:
A. Improper surveys
B. Th source being left in an uncontrolled state
C. The source not being locked once retracted to the shielded position.
D. All of the above
A. The radiographer - Answer 6. The responsibility to adhere to the regulations, license
conditions and company policies falls to:
A. The radiographer
B. The assistant radiographer
C. The Radiation Safety Officer
D. All radiation workers
C. Ernest Rutherford - Answer 7. Alpha particles were discovered by:
A. Marie Curie
B. Pierre Curie
C. Ernest Rutherford
D. Henri Becquerel
D. Massachusetts General - Answer 8. The first medical X-ray was conducted at:
A. Berlin Memorial Hospital
B. Oslow General
C. Boston General
D. Massachusetts General
A. True - Answer 9. Regulations from one state to the next are essentially the same for
radioactive materials.
, A. True
B. False
B. Their radiation safety officer - Answer 10. A radiographer has several avenues to seek
guidance and counsel. The first person he or she can turn to is?
A. Their state or federal jurisdictions hotline
B. Their program's radiation safety officer
C. A senior technician
D. The NRC
B. Wilhelm Roentgen - Answer 11. The origins of industrial radiography can be attributed to:
A. Henri Becquerel
B. Wilhelm Roentgen
C. Ernest Rutherford
D. Pierre Curie
C. Particulate and Electromagetic - Answer CHAPTER TWO
1. The two basic types of radiation are:
A. Audible and Visible
B. Sub-light and faster than light.
C. Particulate and electromagnetic
D. Energetic and prolific
B. At the speed of light without regard to pressure, temperature or magnetic fields. - Answer
2. Wavelike radiation travels at:
A. Just slightly below the speed of light as atmospheric conditions are not constant.
B. At the speed of light without regard to pressure, temperature or magnetic fields.
C. In a wavelike motion allowing it curve around objects
Correct Answers 2026 Updated.
CHAPTER 1
D. All the above - Answer 1. In the early years of Radiography, what caused personnel to be
overexposed?
A. Poor equipment design
B. Lack of understanding
C. Lack of and poor safety practices
D. All the above
D. Late in 1898 - Answer 2. In what year did Marie Curie discover Radium?
A. The beginning of 1896
B. The end of 1897
C. The beginning of 1898
D. Late in 1898
A. Marie and Pierre Curie - Answer 3. Who coined the term Radioactivity
A. Marie and Pierre Curie
B. Henry Becquerel
C. Ernest Rutherford
D. Wilhelm Roentgen
C. 3 in (7.62 cm) - Answer 4. In the early years of radiography from 1920-1930, the maximum
thickness that could be inspected via x-radiation was________ of steel?
A. 1 in. (2.54cm)
B. 2 in. (5.08 cm)
C. 3 in. (7.62 cm)
D. 10 in. (25.4 cm)
,D. All of the above - Answer 5. Historically, it has been proven that the predominant cause of
overexposure is:
A. Improper surveys
B. Th source being left in an uncontrolled state
C. The source not being locked once retracted to the shielded position.
D. All of the above
A. The radiographer - Answer 6. The responsibility to adhere to the regulations, license
conditions and company policies falls to:
A. The radiographer
B. The assistant radiographer
C. The Radiation Safety Officer
D. All radiation workers
C. Ernest Rutherford - Answer 7. Alpha particles were discovered by:
A. Marie Curie
B. Pierre Curie
C. Ernest Rutherford
D. Henri Becquerel
D. Massachusetts General - Answer 8. The first medical X-ray was conducted at:
A. Berlin Memorial Hospital
B. Oslow General
C. Boston General
D. Massachusetts General
A. True - Answer 9. Regulations from one state to the next are essentially the same for
radioactive materials.
, A. True
B. False
B. Their radiation safety officer - Answer 10. A radiographer has several avenues to seek
guidance and counsel. The first person he or she can turn to is?
A. Their state or federal jurisdictions hotline
B. Their program's radiation safety officer
C. A senior technician
D. The NRC
B. Wilhelm Roentgen - Answer 11. The origins of industrial radiography can be attributed to:
A. Henri Becquerel
B. Wilhelm Roentgen
C. Ernest Rutherford
D. Pierre Curie
C. Particulate and Electromagetic - Answer CHAPTER TWO
1. The two basic types of radiation are:
A. Audible and Visible
B. Sub-light and faster than light.
C. Particulate and electromagnetic
D. Energetic and prolific
B. At the speed of light without regard to pressure, temperature or magnetic fields. - Answer
2. Wavelike radiation travels at:
A. Just slightly below the speed of light as atmospheric conditions are not constant.
B. At the speed of light without regard to pressure, temperature or magnetic fields.
C. In a wavelike motion allowing it curve around objects
