Radiation Therapy Board Exam Review – MOSBY Questions and Answers With
Verified Solutions 2025
Orthovoltage machines operated in the range of
A. 10-40 KV
B. 100 KV
C. 100-200 KV
D. 150-500 KV - ✔✔D. 150-500 KV
0.01 J/Kg is equivalent to:
A. 1 Roengtgen
B. 1 RAD
C. 1 Gy
D. 1 Bq - ✔✔B. 1 RAD
A pocket dosimeter is a
A. low energy dosimeter
B. thermoluminescent dosimeter
C. cutie pie
D. none of the above - ✔✔A. low energy dosimeter
Traditional unit of absorbed dose equivalent.
A. REM
B. RAD
C. Roentgen
D. RBE - ✔✔A. REM
Unit of exposure in air is:
A. Roetgen
,B. Planck
C. Curie
D. REM - ✔✔A. Roentgen
Annual dose lime for occupational exposure.
A. 5 REM
B. 15 REM
C. 30 REM
D. 50 REM - ✔✔D. 50 REM.
500 mSv --> 50 REM
Annual dose limit for the general public is:
A. 0.1 REM
B. 0.5 REM
C. 1 REM
D. 5 REM - ✔✔A. 0.1 REM
0.1 REM --> 1 mSv
When a patient is treated with Iodine 131 the room should be labeled as:
A. High radiation- grave danger
B. Caution: radioactive materials
C. Caution: high Dose radiation
D. Do not enter: radiation at excessive levels - ✔✔B. caution: radioactive materials
When calibrating ion chambers, which are needed?
1. Barometric pressure
2. volume of chamber
3. temperature
4.beam energy - ✔✔1, 2, 3 but NOT beam energy
,for a controlled area, the shielding must be sufficient to reduce exposure to no more than:
A. 1 mREM/hr
B. 10 mREM/hr
C. 1 mREM/week
D. 100 mREM/ week - ✔✔D. 100 mREM/week
0.1 REM/week --> 100 mREM/Week
Light field and radiation field congruence should be checked:
A. daily
B. monthly
C. weekly
D. semiannually - ✔✔B. monthly
The most convenient and economical method of whole body personnel monitoring:
A. pocket dosimeter
B. film badge
C. TLD
D. Geiger counter - ✔✔B. film badge
annual dose limit for members of the general public is:
A. 0.1 rem
B. 0.5 rem
C. 1.0 rem
D. 5.0 rem - ✔✔A. 0.1 rem
(1 mSv = 0.1 rem)
radiation level reaching 60 mrem/hr is classified as:
A. radiation area
, B. high radiation area
C. very high radiation area
D. dangerous radiation area - ✔✔A. radiation area
(high radiation area = >100 mrem/hr)
When calibrating ion chambers, which of the following factors are needed?
1. barometric pressure
2. volume of the chamber
3. temperature
4. beam energy - ✔✔1, 2, and 3
for a controlled area, the shielding must be sufficient to reduce exposure to no more than:
A. 1 mrem/hr
B. 10 mrem/hr
C. 1 mrem/week
D. 100 mrem/week - ✔✔D. 100 mrem/week (0.1 rem/week)
the basic types of interaction between x-ray and matter includes all except:
A. compton scatter
B. radiative bremsstrahlung production
C. photoelectric absorption
D. pair produciton - ✔✔B. radiative bremsstrahlung production (product of electron integration with
matter)
What is the SI unit for exposure (roentgen - traditional) - ✔✔coulomb/kg or air
prodromal stage of acute radiation syndrome consists of:
A. nausea
B. fatigue
Verified Solutions 2025
Orthovoltage machines operated in the range of
A. 10-40 KV
B. 100 KV
C. 100-200 KV
D. 150-500 KV - ✔✔D. 150-500 KV
0.01 J/Kg is equivalent to:
A. 1 Roengtgen
B. 1 RAD
C. 1 Gy
D. 1 Bq - ✔✔B. 1 RAD
A pocket dosimeter is a
A. low energy dosimeter
B. thermoluminescent dosimeter
C. cutie pie
D. none of the above - ✔✔A. low energy dosimeter
Traditional unit of absorbed dose equivalent.
A. REM
B. RAD
C. Roentgen
D. RBE - ✔✔A. REM
Unit of exposure in air is:
A. Roetgen
,B. Planck
C. Curie
D. REM - ✔✔A. Roentgen
Annual dose lime for occupational exposure.
A. 5 REM
B. 15 REM
C. 30 REM
D. 50 REM - ✔✔D. 50 REM.
500 mSv --> 50 REM
Annual dose limit for the general public is:
A. 0.1 REM
B. 0.5 REM
C. 1 REM
D. 5 REM - ✔✔A. 0.1 REM
0.1 REM --> 1 mSv
When a patient is treated with Iodine 131 the room should be labeled as:
A. High radiation- grave danger
B. Caution: radioactive materials
C. Caution: high Dose radiation
D. Do not enter: radiation at excessive levels - ✔✔B. caution: radioactive materials
When calibrating ion chambers, which are needed?
1. Barometric pressure
2. volume of chamber
3. temperature
4.beam energy - ✔✔1, 2, 3 but NOT beam energy
,for a controlled area, the shielding must be sufficient to reduce exposure to no more than:
A. 1 mREM/hr
B. 10 mREM/hr
C. 1 mREM/week
D. 100 mREM/ week - ✔✔D. 100 mREM/week
0.1 REM/week --> 100 mREM/Week
Light field and radiation field congruence should be checked:
A. daily
B. monthly
C. weekly
D. semiannually - ✔✔B. monthly
The most convenient and economical method of whole body personnel monitoring:
A. pocket dosimeter
B. film badge
C. TLD
D. Geiger counter - ✔✔B. film badge
annual dose limit for members of the general public is:
A. 0.1 rem
B. 0.5 rem
C. 1.0 rem
D. 5.0 rem - ✔✔A. 0.1 rem
(1 mSv = 0.1 rem)
radiation level reaching 60 mrem/hr is classified as:
A. radiation area
, B. high radiation area
C. very high radiation area
D. dangerous radiation area - ✔✔A. radiation area
(high radiation area = >100 mrem/hr)
When calibrating ion chambers, which of the following factors are needed?
1. barometric pressure
2. volume of the chamber
3. temperature
4. beam energy - ✔✔1, 2, and 3
for a controlled area, the shielding must be sufficient to reduce exposure to no more than:
A. 1 mrem/hr
B. 10 mrem/hr
C. 1 mrem/week
D. 100 mrem/week - ✔✔D. 100 mrem/week (0.1 rem/week)
the basic types of interaction between x-ray and matter includes all except:
A. compton scatter
B. radiative bremsstrahlung production
C. photoelectric absorption
D. pair produciton - ✔✔B. radiative bremsstrahlung production (product of electron integration with
matter)
What is the SI unit for exposure (roentgen - traditional) - ✔✔coulomb/kg or air
prodromal stage of acute radiation syndrome consists of:
A. nausea
B. fatigue
