RHS DANB EXAM QUESTIONS AND
TERMS rated A+ 2025/2026
As Low As Reasonably Achievable - correct answer ✔ALARA
Symptoms of short term radiation effects after a massive dose of ionizing radiation - correct answer
✔Acute Radiation Syndrome (ARS)
Erythema,nausea, vomiting,diarrhea,hemorrhage,hair loss - correct answer ✔Symptoms of ARS
maybe very short or extremely long
short term effects:mins,days,wks
long term effects: years,decades,generations
depends on the rates of mitosis - correct answer ✔Latent period
controls the size and shape of the useful beam - correct answer ✔What is Collimation?
70% - correct answer ✔Rectangular collimators reduces scatter by
1.reduces radiation dose to the patient by reducing the volume of tissue exposed
2.reduces scatter radiation that causes poor contrast of the radiograph - correct answer ✔2 important
functions of Collimation are?
the shape of the collimator - correct answer ✔PID shape indicates
D Speed (slowest)
, E Speed (twice as fast a D)
F Speed (fastest) - correct answer ✔3 speeds of intraoral film
0.25mm of lead - correct answer ✔What is the Lead Apron Made of?
it can expose the operator to a significant amount of radiation - correct answer ✔how is radiation
leakage dangerous?
provides protection from potential scattered radiation - correct answer ✔shielding?
at aleast 6ft away - correct answer ✔how far should the operator be from the head of the patient?
film badge,TLD,OSL,DIS
they measure the amount of radiation the operator is getting - correct answer ✔Personnel Monitoring?
Maximum Permissible Dose - correct answer ✔what does MPD mean?
the dose equivalent of ionizing radiation that, in light of present knowledge, is not expected to cause
detectable body damage to avg persons during their lifetime - correct answer ✔MPD?
50 mSv (5rem per year) - correct answer ✔MPD for a Radiation workers?
5mSv - correct answer ✔MPD for general public (18yrs and under)
it is recommended that exposure to the fetus be limited to 5mSv per year (.5rem), and not to receive
0.5mSv per month(0.05 rem) - correct answer ✔MPD for Pregnant woman
TERMS rated A+ 2025/2026
As Low As Reasonably Achievable - correct answer ✔ALARA
Symptoms of short term radiation effects after a massive dose of ionizing radiation - correct answer
✔Acute Radiation Syndrome (ARS)
Erythema,nausea, vomiting,diarrhea,hemorrhage,hair loss - correct answer ✔Symptoms of ARS
maybe very short or extremely long
short term effects:mins,days,wks
long term effects: years,decades,generations
depends on the rates of mitosis - correct answer ✔Latent period
controls the size and shape of the useful beam - correct answer ✔What is Collimation?
70% - correct answer ✔Rectangular collimators reduces scatter by
1.reduces radiation dose to the patient by reducing the volume of tissue exposed
2.reduces scatter radiation that causes poor contrast of the radiograph - correct answer ✔2 important
functions of Collimation are?
the shape of the collimator - correct answer ✔PID shape indicates
D Speed (slowest)
, E Speed (twice as fast a D)
F Speed (fastest) - correct answer ✔3 speeds of intraoral film
0.25mm of lead - correct answer ✔What is the Lead Apron Made of?
it can expose the operator to a significant amount of radiation - correct answer ✔how is radiation
leakage dangerous?
provides protection from potential scattered radiation - correct answer ✔shielding?
at aleast 6ft away - correct answer ✔how far should the operator be from the head of the patient?
film badge,TLD,OSL,DIS
they measure the amount of radiation the operator is getting - correct answer ✔Personnel Monitoring?
Maximum Permissible Dose - correct answer ✔what does MPD mean?
the dose equivalent of ionizing radiation that, in light of present knowledge, is not expected to cause
detectable body damage to avg persons during their lifetime - correct answer ✔MPD?
50 mSv (5rem per year) - correct answer ✔MPD for a Radiation workers?
5mSv - correct answer ✔MPD for general public (18yrs and under)
it is recommended that exposure to the fetus be limited to 5mSv per year (.5rem), and not to receive
0.5mSv per month(0.05 rem) - correct answer ✔MPD for Pregnant woman
