RADIATION PROTECTION ARRT STUDY GUIDE
Which of the following is the unit of absorbed radiation dose: - ANSWER Gray,
measure amount of energy transferred from x-ray beam to the body
Which of the following personnel monitoring devices is capable of providing an
immediate reading: - ANSWER pocket dosimeter, pen like object you hold up to the
light
Of the following types of radiation, which one is considered the most ionizing: -
ANSWER alpha, large and easy to ionize
The Geiger counter is capable of detecting which of the following types of radiation: -
ANSWER x-rays, gamma rays, beta particles
The time it takes for a radioactive material to have 1/2 of its atoms disintegrate is
known as what: - ANSWER half-life
How many milligram in one gray: - ANSWER 1000
While wearing a lead apron where should the radiation monitor be worn: - ANSWER
on the collar, outside the apron
Which of the following would be considered natural background radiation: -
ANSWER cosmic rays, alpha particles
The reduction of the intensity of radiation as it passes through a material known as: -
ANSWER attenuation
Which of the following is the least expensive type of radiation monitoring: - ANSWER
film badge
Which of the following is the unit of exposure dose of gamma, x-rays: - ANSWER
coulomb per kilogram (C/kg)
Which of the following timers is used to accurately and automatically reproduce
radiographic exposures: - ANSWER phototimer
Radiation monitoring instruments depend on which of the following: - ANSWER
ionization
Which of the following radiation monitoring devices is considered to be the most
accurate: - ANSWER optically stimulated luminescence dosimeter (OSL) accurate
to 10 millieseiverts
Which of the following describes an Alpha particles: - ANSWER 2 protons, 2
neutrons
, The allowable occupational radiation dosage that is assumed to result in an average
nominal lifetime risk is known as what: - ANSWER effective dose limit
How many half-value layers are required to reduce a 100 R/minute exposure rate to
25 R/minute: - ANSWER 2 - 100 is reduced to 50
Which of the following interactions will occur in the diagnostic x-ray range: -
ANSWER coherent (classical) scatter, Compton scatter, photoelectric scatter
Which of the following refers to measuring the quantity of an x-ray beam: - ANSWER
dosimetry
The becquerel is a measurement of which of the following: - ANSWER number of
disintegrations per second
Radiation that leaves the tube housing by any means other than through the window
is called what: - ANSWER leakage radiation
Which of the following types of radiation is classified as electromagnetic: - ANSWER
gamma
Radiation that changes direction as it passes through a material is called what: -
ANSWER scatter
Which of the following are by-products of photoelectric absorption: - ANSWER
photoelectron, characteristic radiation, ionized atom
The probability of photoelectric absorption occurring increases with an increase in
which of the following: - ANSWER atomic number of material
What is the cumulative effective dose limit for a 25 year old radiation worker: -
ANSWER 250 millisievert (NCRP #116)
Which of the following is a major disadvantage of a film badge as a radiation
monitoring device: - ANSWER immediate reading are not available
Which of the following refers to the primary beam after it has passed through the
beam restricting device: - ANSWER useful beam - primary beam
Where should a radiation worker's radiation monitor be located if he/she is receiving
a medical radiographic exam: - ANSWER Not in the radiographic room
Which of the following refers to biological dose: - ANSWER relative biological
effectiveness (RBE)
What are the two general types of radiation detection devices: - ANSWER field
survey and personnel monitoring
Field survey units: - ANSWER used to determine exposure rates and detection of
radiation
Which of the following is the unit of absorbed radiation dose: - ANSWER Gray,
measure amount of energy transferred from x-ray beam to the body
Which of the following personnel monitoring devices is capable of providing an
immediate reading: - ANSWER pocket dosimeter, pen like object you hold up to the
light
Of the following types of radiation, which one is considered the most ionizing: -
ANSWER alpha, large and easy to ionize
The Geiger counter is capable of detecting which of the following types of radiation: -
ANSWER x-rays, gamma rays, beta particles
The time it takes for a radioactive material to have 1/2 of its atoms disintegrate is
known as what: - ANSWER half-life
How many milligram in one gray: - ANSWER 1000
While wearing a lead apron where should the radiation monitor be worn: - ANSWER
on the collar, outside the apron
Which of the following would be considered natural background radiation: -
ANSWER cosmic rays, alpha particles
The reduction of the intensity of radiation as it passes through a material known as: -
ANSWER attenuation
Which of the following is the least expensive type of radiation monitoring: - ANSWER
film badge
Which of the following is the unit of exposure dose of gamma, x-rays: - ANSWER
coulomb per kilogram (C/kg)
Which of the following timers is used to accurately and automatically reproduce
radiographic exposures: - ANSWER phototimer
Radiation monitoring instruments depend on which of the following: - ANSWER
ionization
Which of the following radiation monitoring devices is considered to be the most
accurate: - ANSWER optically stimulated luminescence dosimeter (OSL) accurate
to 10 millieseiverts
Which of the following describes an Alpha particles: - ANSWER 2 protons, 2
neutrons
, The allowable occupational radiation dosage that is assumed to result in an average
nominal lifetime risk is known as what: - ANSWER effective dose limit
How many half-value layers are required to reduce a 100 R/minute exposure rate to
25 R/minute: - ANSWER 2 - 100 is reduced to 50
Which of the following interactions will occur in the diagnostic x-ray range: -
ANSWER coherent (classical) scatter, Compton scatter, photoelectric scatter
Which of the following refers to measuring the quantity of an x-ray beam: - ANSWER
dosimetry
The becquerel is a measurement of which of the following: - ANSWER number of
disintegrations per second
Radiation that leaves the tube housing by any means other than through the window
is called what: - ANSWER leakage radiation
Which of the following types of radiation is classified as electromagnetic: - ANSWER
gamma
Radiation that changes direction as it passes through a material is called what: -
ANSWER scatter
Which of the following are by-products of photoelectric absorption: - ANSWER
photoelectron, characteristic radiation, ionized atom
The probability of photoelectric absorption occurring increases with an increase in
which of the following: - ANSWER atomic number of material
What is the cumulative effective dose limit for a 25 year old radiation worker: -
ANSWER 250 millisievert (NCRP #116)
Which of the following is a major disadvantage of a film badge as a radiation
monitoring device: - ANSWER immediate reading are not available
Which of the following refers to the primary beam after it has passed through the
beam restricting device: - ANSWER useful beam - primary beam
Where should a radiation worker's radiation monitor be located if he/she is receiving
a medical radiographic exam: - ANSWER Not in the radiographic room
Which of the following refers to biological dose: - ANSWER relative biological
effectiveness (RBE)
What are the two general types of radiation detection devices: - ANSWER field
survey and personnel monitoring
Field survey units: - ANSWER used to determine exposure rates and detection of
radiation
