RADIATION SAFETY (AMMO 66) EXAM
PREPARATION NEWEST 2026-2027 WITH
COMPLETE QUESTIONS AND CORRECT ANSWERS
|BRAND NEW VERSION!
1. A nurse is assessing a pregnant client
1. What type of radiation consists of helium nuclei?
A. Beta
B. Gamma
C. Alpha
D. Neutron
Rationale: Alpha particles are helium nuclei (2 protons + 2
neutrons).
2. Which radiation has the greatest penetrating power?
A. Alpha
B. Beta
C. Gamma
D. Electron
Rationale: Gamma rays have no mass or charge, allowing deep
penetration.
3. The unit used to measure absorbed dose is:
,A. Curie
B. Gray
C. Becquerel
D. Roentgen
Rationale: Gray (Gy) measures absorbed radiation dose in
tissue.
4. What principle involves reducing exposure time, increasing
distance, and using shielding?
A. Containment
B. Detection
C. ALARA
D. Moderation
Rationale: ALARA (As Low As Reasonably Achievable) minimizes
radiation exposure.
5. Which instrument is commonly used for detecting low
levels of contamination?
A. Ion chamber
B. Geiger-Mueller counter
C. Dosimeter
D. Spectrometer
Rationale: GM counters are very sensitive to low-level
contamination.
,6. Which type of radiation is stopped by a sheet of paper?
A. Gamma
B. Beta
C. Alpha
D. Neutron
Rationale: Alpha particles have very low penetration.
7. The biological effect of radiation is primarily due to:
A. Heating
B. Ionization of atoms
C. Pressure changes
D. Magnetism
Rationale: Radiation damages tissue mainly through ionization.
8. Which device measures an individual’s accumulated
radiation dose?
A. Survey meter
B. Dosimeter
C. GM counter
D. Ion probe
Rationale: Personal dosimeters track cumulative exposure.
, 9. What is the SI unit of radioactivity?
A. Curie
B. Becquerel
C. Gray
D. Sievert
Rationale: Becquerel (Bq) measures disintegrations per second.
10. Increasing distance from a radiation source reduces
exposure according to the:
A. Square law
B. Linear law
C. Inverse square law
D. Exponential law
Rationale: Intensity decreases with the square of distance.
11. Which type of radiation is most hazardous internally?
A. Gamma
B. Beta
C. Alpha
D. X-ray
Rationale: Alpha particles cause severe damage when inhaled
or ingested.
PREPARATION NEWEST 2026-2027 WITH
COMPLETE QUESTIONS AND CORRECT ANSWERS
|BRAND NEW VERSION!
1. A nurse is assessing a pregnant client
1. What type of radiation consists of helium nuclei?
A. Beta
B. Gamma
C. Alpha
D. Neutron
Rationale: Alpha particles are helium nuclei (2 protons + 2
neutrons).
2. Which radiation has the greatest penetrating power?
A. Alpha
B. Beta
C. Gamma
D. Electron
Rationale: Gamma rays have no mass or charge, allowing deep
penetration.
3. The unit used to measure absorbed dose is:
,A. Curie
B. Gray
C. Becquerel
D. Roentgen
Rationale: Gray (Gy) measures absorbed radiation dose in
tissue.
4. What principle involves reducing exposure time, increasing
distance, and using shielding?
A. Containment
B. Detection
C. ALARA
D. Moderation
Rationale: ALARA (As Low As Reasonably Achievable) minimizes
radiation exposure.
5. Which instrument is commonly used for detecting low
levels of contamination?
A. Ion chamber
B. Geiger-Mueller counter
C. Dosimeter
D. Spectrometer
Rationale: GM counters are very sensitive to low-level
contamination.
,6. Which type of radiation is stopped by a sheet of paper?
A. Gamma
B. Beta
C. Alpha
D. Neutron
Rationale: Alpha particles have very low penetration.
7. The biological effect of radiation is primarily due to:
A. Heating
B. Ionization of atoms
C. Pressure changes
D. Magnetism
Rationale: Radiation damages tissue mainly through ionization.
8. Which device measures an individual’s accumulated
radiation dose?
A. Survey meter
B. Dosimeter
C. GM counter
D. Ion probe
Rationale: Personal dosimeters track cumulative exposure.
, 9. What is the SI unit of radioactivity?
A. Curie
B. Becquerel
C. Gray
D. Sievert
Rationale: Becquerel (Bq) measures disintegrations per second.
10. Increasing distance from a radiation source reduces
exposure according to the:
A. Square law
B. Linear law
C. Inverse square law
D. Exponential law
Rationale: Intensity decreases with the square of distance.
11. Which type of radiation is most hazardous internally?
A. Gamma
B. Beta
C. Alpha
D. X-ray
Rationale: Alpha particles cause severe damage when inhaled
or ingested.
