Mosby's Questions (Safety) 2025/2026 Exam Questions and Verified Answers | Already Graded A+

Mosby's Questions (Safety) 2025/2026
Exam Questions and Verified Answers |
Already Graded A+



Natural background radiation represents what percentage of humans

radiation exposure?




a.) 21%

b.) 50%

c.) 82%


d.) 5% - 🧠ANSWER ✔✔B




50%

The greatest source of natural background radiation exposure is:




a.) Cosmic rays

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,b.) Radioactive materials

c.) The body itself


d.) Radon gas - 🧠ANSWER ✔✔D




Radon gas

Cosmic radiation:




a.) Is present only in space

b.) Is a source of exposure only to persons who lie in the sun

c.) Is of concern only to space travelers


d.) Is a part of natural background exposure - 🧠ANSWER ✔✔D




Is a part of natural background exposure

Radon gas:




a.) Presents a danger when undetected


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,b.) Is present in doses proportional to other sources

c.) Is entirely human-made


d.) Is the source of 100% of annual background dose - 🧠ANSWER ✔✔A




Presents a danger when undetected

X-rays and gamma rays used in diagnostic imaging are:




a.) Not of concern because the beam is filtered

b.) Part of the natural background dose

c.) Part of an artificial background radiation dose


d.) An insignificant dose to the general population - 🧠ANSWER ✔✔C




Part of an artificial background radiation dose

A feature of fluoroscopic X-ray machines that automatically adjusts kVp

and mA so as to maintain image brightness for necessary image quality is

called:



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, a.) Automatic imaging

b.) Automatic brightness control (ABC)

c.) Automatic image processing


d.) Constant exposure output - 🧠ANSWER ✔✔B




Automatic brightness control (ABC)

What term best describes the approximate skin dose where the X-ray beam

is exerting the patient?




a.) Effective dose

b.) Nonoccupational dose

c.) In-air exposure


d.) Air kerma - 🧠ANSWER ✔✔D




Air kerma


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