RTE 2563 EXAM 1 QUESTIONS WITH VERIFIED
ANSWERS
The symbol Z indicates:
a. atomic weight of an atom.
b. fluorescent yield.
c. the number of vacancies in an atomic shell.
d. atomic number of an atom. - Answers - d. atomic number of an atom.
Which of the following radiation quantities is intended to be the best overall measure of
the biologic effects of ionizing radiation?
a. Effective dose
b. Exposure
c. There is no radiation quantity that is intended to be the best overall measure of the
biologic effects of ionizing radiation.
d. Absorbed dose - Answers - a. Effective dose
In which of the following X-ray interactions with matter is the energy of the incident
photon completely absorbed?
a. Photoelectric absorption
b. Characteristic interactions
c. Compton scattering
d. Bremsstrahlung interactions - Answers - a. Photoelectric absorption
The main contributor to image fog is this interaction:
a. pair production
b. photelectric
c. Compton
d. coherent - Answers - c. Compton
The radiation a person receives from the sun (cosmic radiation) is categorized as
a. radioactivity.
b. natural background radiation.
c. atmospheric radiation.
d. medical background radiation. - Answers - b. natural background radiation.
Every radiology department should provide a radiation safety program that includes
___________________.
,a. training new employees
b. periodic in-services for all employees
c. counseling during pregnancy
d. All of the above - Answers - d. All of the above
Which of the following would be considered a "stochastic" effect from radiation?
a. blood disorders
b. radiodermatitis
c. lung cancer
d. skin erythema - Answers - c. lung cancer
The initial threshold dose limit used until 1934 was ______ R/day.
a. 0.2
b. 2.0
c. 0.02
d. 20 - Answers - a. 0.2
The gas which is a decay product of radium is
a. radon.
b. cesium.
c. strontium.
d. x-ray. - Answers - a. radon.
Which of the following is not a type of interaction between x-radiation and biologic
matter?
a. Bremsstrahlung
b. Compton scattering
c. Pair production
d. Photoelectric absorption - Answers - a. Bremsstrahlung
Which of the following is considered by the EPA to be the second leading cause of lung
cancer in the United States?
a. Annual PA and lateral chest radiographic images
b. Radon exposure
c. A fluoroscopic examination of the upper gastrointestinal tract
d. Cosmic ray exposure - Answers - b. Radon exposure
The term as low as reasonable achievable (ALARA) is synonymous with the term
a. optimization for radiation protection (ORP).
, b. diagnostic efficacy.
c. equivalent dose (EqD).
d. background equivalent radiation time (BERT). - Answers - a. optimization for radiation
protection (ORP).
The probability of occurrence of photoelectric absorption _________ as the energy of
the incident photon decreases and the atomic number of the irradiated atoms
_________.
a. decreases markedly; increases
b. increases markedly; decreases
c. stays the same; increases
d. increases markedly; increases - Answers - d. increases markedly; increases
In the electromagnetic spectrum, higher frequencies are associated with
a. longer wavelengths and lower energies.
b. longer wavelengths and higher energies.
c. shorter wavelengths and higher energies.
d. shorter wavelengths and lower energies. - Answers - c. shorter wavelengths and
higher energies.
If the risk of performing an exam outweighs the benefit of the exam, then the exam
should be:
a. canceled or not ordered
b. all of the above; depends on physician preference
c. carried out as normally
d. rescheduled until the patient is older - Answers - a. canceled or not ordered
Typically, people are more willing to accept a risk if they perceive that the potential
benefit to be obtained is
a. greater than the risk involved.
b. typically, people are not willing to accept risk no matter how great the benefit may be.
c. less than the risk involved.
d. equal to the risk involved. - Answers - a. greater than the risk involved.
A negative contrast agent will enhance ______________.
a. attenuation
b. transmission
c. all of the above
d. absorption - Answers - b. transmission
Which of these is NOT a property of x-ray photons?
ANSWERS
The symbol Z indicates:
a. atomic weight of an atom.
b. fluorescent yield.
c. the number of vacancies in an atomic shell.
d. atomic number of an atom. - Answers - d. atomic number of an atom.
Which of the following radiation quantities is intended to be the best overall measure of
the biologic effects of ionizing radiation?
a. Effective dose
b. Exposure
c. There is no radiation quantity that is intended to be the best overall measure of the
biologic effects of ionizing radiation.
d. Absorbed dose - Answers - a. Effective dose
In which of the following X-ray interactions with matter is the energy of the incident
photon completely absorbed?
a. Photoelectric absorption
b. Characteristic interactions
c. Compton scattering
d. Bremsstrahlung interactions - Answers - a. Photoelectric absorption
The main contributor to image fog is this interaction:
a. pair production
b. photelectric
c. Compton
d. coherent - Answers - c. Compton
The radiation a person receives from the sun (cosmic radiation) is categorized as
a. radioactivity.
b. natural background radiation.
c. atmospheric radiation.
d. medical background radiation. - Answers - b. natural background radiation.
Every radiology department should provide a radiation safety program that includes
___________________.
,a. training new employees
b. periodic in-services for all employees
c. counseling during pregnancy
d. All of the above - Answers - d. All of the above
Which of the following would be considered a "stochastic" effect from radiation?
a. blood disorders
b. radiodermatitis
c. lung cancer
d. skin erythema - Answers - c. lung cancer
The initial threshold dose limit used until 1934 was ______ R/day.
a. 0.2
b. 2.0
c. 0.02
d. 20 - Answers - a. 0.2
The gas which is a decay product of radium is
a. radon.
b. cesium.
c. strontium.
d. x-ray. - Answers - a. radon.
Which of the following is not a type of interaction between x-radiation and biologic
matter?
a. Bremsstrahlung
b. Compton scattering
c. Pair production
d. Photoelectric absorption - Answers - a. Bremsstrahlung
Which of the following is considered by the EPA to be the second leading cause of lung
cancer in the United States?
a. Annual PA and lateral chest radiographic images
b. Radon exposure
c. A fluoroscopic examination of the upper gastrointestinal tract
d. Cosmic ray exposure - Answers - b. Radon exposure
The term as low as reasonable achievable (ALARA) is synonymous with the term
a. optimization for radiation protection (ORP).
, b. diagnostic efficacy.
c. equivalent dose (EqD).
d. background equivalent radiation time (BERT). - Answers - a. optimization for radiation
protection (ORP).
The probability of occurrence of photoelectric absorption _________ as the energy of
the incident photon decreases and the atomic number of the irradiated atoms
_________.
a. decreases markedly; increases
b. increases markedly; decreases
c. stays the same; increases
d. increases markedly; increases - Answers - d. increases markedly; increases
In the electromagnetic spectrum, higher frequencies are associated with
a. longer wavelengths and lower energies.
b. longer wavelengths and higher energies.
c. shorter wavelengths and higher energies.
d. shorter wavelengths and lower energies. - Answers - c. shorter wavelengths and
higher energies.
If the risk of performing an exam outweighs the benefit of the exam, then the exam
should be:
a. canceled or not ordered
b. all of the above; depends on physician preference
c. carried out as normally
d. rescheduled until the patient is older - Answers - a. canceled or not ordered
Typically, people are more willing to accept a risk if they perceive that the potential
benefit to be obtained is
a. greater than the risk involved.
b. typically, people are not willing to accept risk no matter how great the benefit may be.
c. less than the risk involved.
d. equal to the risk involved. - Answers - a. greater than the risk involved.
A negative contrast agent will enhance ______________.
a. attenuation
b. transmission
c. all of the above
d. absorption - Answers - b. transmission
Which of these is NOT a property of x-ray photons?
