Mosbys Comprehensive Review of
Radiography-CHALLENGE TEST #2
2025/2026 Exam Questions and Answers
| 100% Solved
The annual of radiation deposited per unit length of tissue traversed by
incoming photons is called: - 🧠ANSWER ✔✔Linear energy transfer (LET)
cataractogenesis, life span shortening, embryologic effects, and
carcinogenesis are examples of - 🧠ANSWER ✔✔long term somatic effects
compton interaction: - 🧠ANSWER ✔✔Decreases contrast in the
radiographic image
Gray, multiplied by a radiation weighting factor equals - 🧠ANSWER
✔✔Sievert
effective dose limit - 🧠ANSWER ✔✔is the level of radiation that an
organism can receive and probaby sustain no appreciable effects
radiation with a high LET: - 🧠ANSWER ✔✔is highly ionizing
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
1
,Radiation protection is based on which dose response relationship? -
🧠ANSWER ✔✔linear-nonthreshold
which of the following states that the radiosensitivity of cells is directly
proportional to their degree of differentiation - 🧠ANSWER ✔✔Law of
Bergonie and Tribondeau
which of the following causes about 95% of cellular response to radiation -
🧠ANSWER ✔✔indirect effect
when radiation strikes DNA, which of the following occurs? - 🧠ANSWER
✔✔Direct effect
the amount of radiation that causes the number of genetic mutations in a
population to double is called the - 🧠ANSWER ✔✔Doubling Dose
the SI units of equivalent dose, activity, air kerma, and absorbed dose are,
respectively: - 🧠ANSWER ✔✔Sievert, becquerel, gray and gray in air
Medical xrays are an example of: - 🧠ANSWER ✔✔Artificially produced
radiation
the effective dose limit for a fetus for the entire gestational period is -
🧠ANSWER ✔✔5.0 mSv
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
2
, the photoelectric effect - 🧠ANSWER ✔✔results in absorption of the incident
photon
the annual effective dose limit for radiographers is - 🧠ANSWER ✔✔50 mSv
the average dose to active bone marrow as an indicator of somatic effects
on a population is called - 🧠ANSWER ✔✔Mean Marrow Dose (MMD)
a radiation dose that if received by the entire population would cause the
same genetic injury as the total of doses received by the members actually
being exposed is called - 🧠ANSWER ✔✔Genetically significant dose
a lead apron of at least what thickness should be worn while being exposed
to scatter radiation - 🧠ANSWER ✔✔0.50 mm PB equivalent
use of a thyroid shield of at least what thickness should be used for
fluoroscopy - 🧠ANSWER ✔✔0.50 mm Pb equivalent
how thick are primary protective barriers - 🧠ANSWER ✔✔1/16 inch lead
equivalent
Primary protective barriers, if in the walll, must extend to a height of at least
- 🧠ANSWER ✔✔7 feet
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
Radiography-CHALLENGE TEST #2
2025/2026 Exam Questions and Answers
| 100% Solved
The annual of radiation deposited per unit length of tissue traversed by
incoming photons is called: - 🧠ANSWER ✔✔Linear energy transfer (LET)
cataractogenesis, life span shortening, embryologic effects, and
carcinogenesis are examples of - 🧠ANSWER ✔✔long term somatic effects
compton interaction: - 🧠ANSWER ✔✔Decreases contrast in the
radiographic image
Gray, multiplied by a radiation weighting factor equals - 🧠ANSWER
✔✔Sievert
effective dose limit - 🧠ANSWER ✔✔is the level of radiation that an
organism can receive and probaby sustain no appreciable effects
radiation with a high LET: - 🧠ANSWER ✔✔is highly ionizing
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
1
,Radiation protection is based on which dose response relationship? -
🧠ANSWER ✔✔linear-nonthreshold
which of the following states that the radiosensitivity of cells is directly
proportional to their degree of differentiation - 🧠ANSWER ✔✔Law of
Bergonie and Tribondeau
which of the following causes about 95% of cellular response to radiation -
🧠ANSWER ✔✔indirect effect
when radiation strikes DNA, which of the following occurs? - 🧠ANSWER
✔✔Direct effect
the amount of radiation that causes the number of genetic mutations in a
population to double is called the - 🧠ANSWER ✔✔Doubling Dose
the SI units of equivalent dose, activity, air kerma, and absorbed dose are,
respectively: - 🧠ANSWER ✔✔Sievert, becquerel, gray and gray in air
Medical xrays are an example of: - 🧠ANSWER ✔✔Artificially produced
radiation
the effective dose limit for a fetus for the entire gestational period is -
🧠ANSWER ✔✔5.0 mSv
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
2
, the photoelectric effect - 🧠ANSWER ✔✔results in absorption of the incident
photon
the annual effective dose limit for radiographers is - 🧠ANSWER ✔✔50 mSv
the average dose to active bone marrow as an indicator of somatic effects
on a population is called - 🧠ANSWER ✔✔Mean Marrow Dose (MMD)
a radiation dose that if received by the entire population would cause the
same genetic injury as the total of doses received by the members actually
being exposed is called - 🧠ANSWER ✔✔Genetically significant dose
a lead apron of at least what thickness should be worn while being exposed
to scatter radiation - 🧠ANSWER ✔✔0.50 mm PB equivalent
use of a thyroid shield of at least what thickness should be used for
fluoroscopy - 🧠ANSWER ✔✔0.50 mm Pb equivalent
how thick are primary protective barriers - 🧠ANSWER ✔✔1/16 inch lead
equivalent
Primary protective barriers, if in the walll, must extend to a height of at least
- 🧠ANSWER ✔✔7 feet
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
