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LMRT ARRT EXAM QUESTIONS AND ANSWERS LATEST VERSION
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"More than 99% of the energy of the electron stream is converted into: - CORRECT ANSWER
heat"
"the high-speed rotation (10,000 rpm) of the anode enables - CORRECT ANSWER Greater
dissipation of heat from high technical factors"
"The degree of angulation of the x-ray tube target will determine the: - CORRECT ANSWER
size of the actual and effective focal spot" "A dual-focus X-ray tube has: 1: Two filaments 2: Two focal spot sizes
3: Two anodes - CORRECT ANSWER 1 and 2"
"The anode heel effect is a phenomenon of X-ray production that results in: - CORRECT
ANSWER Uneven distribution of radiation within the x-ray field"
"The penetrating power of the X-ray beam is controlled by varying the - CORRECT ANSWER
Peak kilovoltage (kVp)"
"The rate flow of current flow across the X-ray tube is measured in - CORRECT ANSWER mA"
"Doubling the mA will result in 1: increased patient dose 2: twice as many photons in the X-ray beam
3: increased radiographic density - CORRECT ANSWER 1, 2, and 3"
"The unit used to indicate the total quantity of X-ray expose is - CORRECT ANSWER
Millionsampere-seconds (mAs)"
"The device for removing long-wavelength radiation from the primary X-ray beam is the -
CORRECT ANSWER Filter"
"Of what material is the filament made? - CORRECT ANSWER Tungsten"
"Of what material is the target/anode made? - CORRECT ANSWER Tungsten"
"What is added to port to remove the long-wavelength radiation? - CORRECT ANSWER
aluminum filtration" "What is the term used to describe the heating of a element to a hot temperature and the
expanding of the electrons in a atom? - CORRECT ANSWER Thermionic emission"
"The cathode side of the X-ray tube is - CORRECT ANSWER Negative"
"The anode side of the X-ray tube is - CORRECT ANSWER Positive"
"What are the two rotation speeds for the anode? - CORRECT ANSWER 3,600 rpm and 10,
rpm"
"The SI measurement of radiation EXPOSURE in Air is the - CORRECT ANSWER gray-a (gy-a)"
"The SI unit used to report the EQUIVALENT DOSE, or occupational dose, to radiation workers in
the us is - CORRECT ANSWER Sievert (Sv)"
"According to the Bergonie-Tribondeau law, the following types of cells are most radiosensitive -
CORRECT ANSWER embryonic tissue cells"
"Short term effects of radiation are typically observed within - CORRECT ANSWER 3 months"
"Which of the following is considered an observable short term effect of radiation exposure -
CORRECT ANSWER erythema"
"The annual effective dose for a whole body non pregnant workers over the age of 18 -
CORRECT ANSWER 50 (mSv)"
"Which of the following changes will decrease patient dose - CORRECT ANSWER High kVp"
"Medical term for throwing up - CORRECT ANSWER Emesis"
"Another term for heart attack? - CORRECT ANSWER myocardial infarction (MI)"
"Medical term for nosebleed - CORRECT ANSWER epistaxis"
"Disease transmission it is any medium that transports micro organisms examples include contaminated food water
drugs and blood - CORRECT ANSWER Vehicle"
"The hepatitis B virus is spread through contact with - CORRECT ANSWER Contaminated
blood, blood products" "These types of hepatitis that are spread through contact with food or water contaminated feces
or type - CORRECT ANSWER A and E"
"Vaccine is available to protect healthcare workers from infection by which hepatitis virus? -
CORRECT ANSWER B"
"If a patient complains of sudden, intense pain under the sternum, you should assume until
proven otherwise that the patient might be having a - CORRECT ANSWER Heart attack"
"Syncope is another term for - CORRECT ANSWER Fainting"
"A sensation of dizziness in which the patient feels as if the room is moving or whirling is termed
CORRECT ANSWER Vertical"
"A transient ischemic attack is a mild, temporary form of a - CORRECT ANSWER Stroke"
"Redness of the skin is termed (___________). - CORRECT ANSWER erythema"
"A severe allergic reaction is termed _______ or ______ - CORRECT ANSWER Anaphylaxis or
anaphylaxis shock"
"What's a DNR order? - CORRECT ANSWER A do-not-resuscitate (DNR) order is an order not to
administer CPR in the event of cardiac or respiratory arrest."
"Below 70 kVp, about what percentage of the beam is bremss - CORRECT ANSWER 100%"
"The unit used to indicate the total QUANTITY of x-rays in an exposure is - CORRECT ANSWER
milliampere-seconds (mAs)" "which of the following will result in increased radiographic density?
- increased mAs
- increased exposure time
3. decresed source-image receptor distance (SID) - CORRECT ANSWER D. 1,2,3"
"The mass density of the body part is referred to as: - CORRECT ANSWER tissue density"
"the primary controller of radiographic DENSITY is - CORRECT ANSWER mAs"
"the difference in radiographic density between any two adjacent portions of the image is called :
- CORRECT ANSWER contrast"
"the primary factor controlling radiographic CONTRAST and x-ray penetration is - CORRECT
ANSWER kVp"
"High contrast produced by using LOW kVp results in an image with: - CORRECT ANSWER a
Short scale of contrast"
"Low contrast produced by High kVp results in an image with - CORRECT ANSWER long-scale
contrast"
"Generalized unwanted exposure on the image is called: - CORRECT ANSWER Fog"
"A decrease in SID will result in: - CORRECT ANSWER increased magnification"
"A misrepresentation in the size or shape of the structure being examined is called: - CORRECT
ANSWER Distortion"
"The "fuzzy" un-sharpness at the edges of structures or body parts is called - CORRECT
ANSWER Penumbra"
"A grid is used when the body part become larger than - CORRECT ANSWER 10 to 12 cm"
"The quality control test of the collimator field and x-ray field must show that the two field are
within 2% of the SID - CORRECT ANSWER True"
"as the kVp is increased, the Compton effect is increased - CORRECT ANSWER True"
"As the kVp is increased, the photoelectric effect is increased - CORRECT ANSWER False"
"The production of scatter results in fog on the radiograph - CORRECT ANSWER true"
"Electrons that are ejected out of atoms. Photon is absorbed. what effect is this - CORRECT
ANSWER Photoelectric Effect"
"Electrons are NOT ejected out of atoms. Incident photon is absorbed. A new photon of lower
frequency is emitted, this effect is called - CORRECT ANSWER Compton Effect"
"The minimum standard lead equivalency for the aprons should be - CORRECT ANSWER 0.
mm"
"The minimum standard of lead equivalent for protective gloves is - CORRECT ANSWER 0.
mm"
"Radiographer perform this quality check every? - CORRECT ANSWER 6 months"
. What type of current is required for proper operation of the x-ray tube? - CORRECT ANSWER
Direct"
"Electromagnetic radiation travels: - CORRECT ANSWER In waves along a straight path"
"Frequency is defined as: - CORRECT ANSWER The number of waves passing a point per unit
time"
"Wavelength is defined as the distance from: - CORRECT ANSWER Peak to peak of the wave"
"Wavelength and frequency are: - CORRECT ANSWER Inversely proportional to each other"
"The x-ray beam changes as it travels through the patient by a process called: - CORRECT
ANSWER Attenuation"
"The intensity of radiation is inversely proportional to the square of the distance between the
source of radiation and the person receiving it. This describes the: - CORRECT ANSWER
inverse square law"
"Electricity is supplied to the imaging department by a: - CORRECT ANSWER Generator"
"High-frequency power: - CORRECT ANSWER Has almost no ripple"
"The primary advantage of three-phase power is that: - CORRECT ANSWER Voltage never
drops to zero"
"A variable transformer that is used to select kVp for the x-ray circuit is the: - CORRECT
ANSWER Autotransformer"
"Which of the following is surrounded by a negatively charged focusing cup? - CORRECT
ANSWER Filament"
"Which of the following is composed of solid-state silicon-based diodes? - CORRECT ANSWER
rectifier"
"What regulates the duration of x-ray production? - CORRECT ANSWER Timer"
"What is located in the x-ray circuit between the high-voltage transformer and the x-ray tube? -
CORRECT ANSWER Rectifier"
"Which of the following measures tube current? - CORRECT ANSWER mA meter"
"What device spins at 10,000-12,000 rpm? - CORRECT ANSWER Anode"
"What device uses maximum heat storage ability of the tube to deliver mAs? - CORRECT
ANSWER Falling load generator"
"What is the source of bremsstrahlung and characteristic rays? - CORRECT ANSWER anode"
"Which of the following has the least voltage ripple? - CORRECT ANSWER high frequency"
"In CR radiography, the photo-stimulable phosphor holds the latent image. - CORRECT
ANSWER true"
"The minimum half value layer at 70 kVp should be ________ - CORRECT ANSWER 2.5 mm Al"
"How should the wheelchair footrests be positioned as a patient is assisted into or out of a
wheelchair? - CORRECT ANSWER Moved aside"
"Which of the following visual signs can the radiographer use to continually assess patient
condition? - CORRECT ANSWER I. Changes in skin color
II. Changes in skin temperature III. Level of consciousness (LOC) IV. Breathing rate V. Motor control" "What type of transmission-based precaution requires the health-care worker to wear a
particulate protection/surgical string mask? - CORRECT ANSWER Airborne
Contact Droplet" "What is the term used to describe the use of various devices to help prevent patient movement
during imaging procedures? - CORRECT ANSWER Immobilization"
"Select the violations of ARRT Rules of Ethics from the following: - CORRECT ANSWER
Submitting misleading educational history Revealing privileged patient communication Violating state/federal narcotics laws" "Which is the term used to describe patient protection concerning release of their private
information? - CORRECT ANSWER Confidentiality"
"Conditions required for valid patient consent include which of the following? - CORRECT
ANSWER I. Legal age
II. Sound mind III. Consent freely IV. Adequately informed"
"True or false, the use of physical restraints on adult patients requires a physician's order? -
CORRECT ANSWER True"
"What is the normal respiratory rate for adults? - CORRECT ANSWER 12 to 18 breaths per
minute"
"Disposable materials wet with contaminated blood or body fluids should be placed where? -
CORRECT ANSWER n a special container marked with biohazard symbol"
"What is the difference between assault and battery? - CORRECT ANSWER Assault is the
threat to touch another in an injurious way; battery is unlawful touching of another without consent" "Reservoir of is the term used to describe the principal habitat where a particular infectious agent
lives and multiplies, and from which it can spread to cause disease. - CORRECT ANSWER
infection"
"Which is the term used to describe the ethical principle of truthfulness? - CORRECT ANSWER
Veracity"
"An inanimate object that has been in contact with an infectious microorganism is termed a -
CORRECT ANSWER fomite."
"What type of transmission-based precaution is required for influenza, mumps, and rubella? -
CORRECT ANSWER Droplet"
"Which is the ethical term used to describe no evil, that is, our obligation not to inflict harm? -
CORRECT ANSWER Nonmaleficence"
"When performing cardiopulmonary resuscitation (CPR) on an infant, it is recommended that the number of compressions per minute, compared with that for an adult,
"Example of radiation-induced conditions that follow a linear nonthreshold dose-response
relationship include? - CORRECT ANSWER genetic effects
radiation-induced cancer leukemia" "What minimum total amount of filtration (inherent plus added) is required in x-ray equipment
operated above 70 kVp? - CORRECT ANSWER 2.5 mm Al equivalent"
"Which x-ray production process do most x-rays get produced by? - CORRECT ANSWER
Bremsstrahlung"
"Where/how should a typical personal radiation monitor be worn? - CORRECT ANSWER At
collar level, facing forward"
"What exposure factor(s) regulate(s) x-ray photon wavelength and beam penetration? -
CORRECT ANSWER kV"
"What is a 35-year-old radiation worker's lifetime cumulative effective dose limit? - CORRECT
ANSWER 350 mSv"
"Which of the following are not types of beam restrictors? - CORRECT ANSWER All are types of
beam restrictors" "Which of the major interactions between x-ray photons and tissue cells is a major contributor to
patient dose? - CORRECT ANSWER Compton scatter"
"Biologic material irradiated under hypoxic conditions is: - CORRECT ANSWER less sensitive
than when irradiated under oxygenated conditions" "The annual effective dose (EfD) limit for radiography students participating in clinical education
before the age of 18 is: - CORRECT ANSWER 1 mSv"
"The following are types of protective apparel for personnel. - CORRECT ANSWER Lead aprons
Lead gloves Thyroid shields" "True or false, the energy of an x-ray beam be described as polyenergetic, or having a spectrum of
energies? - CORRECT ANSWER True"
"The genetic dose of radiation borne by each member of the reproductive population is called the
- CORRECT ANSWER genetically significant dose"
"Because the primary x-ray beam is polyenergetic, the entrance dose is often: - CORRECT
ANSWER significantly greater than the exit dose."
"The type of acute radiation syndrome that requires the least amount of ionizing radiation dose
to occur is: - CORRECT ANSWER Hematological"
"Where/how should a fetal personal radiation monitor be worn? - CORRECT ANSWER Under
the lead apron, at waist level"
"Which of the following illustrates the inverse square law? - CORRECT ANSWER Distance is a
most effective protection from radiation."
"Which is not a type of patient shield? - CORRECT ANSWER Flat shadow shields"
"The two basic types of protective barriers are - CORRECT ANSWER primary barriers and
secondary barriers."
"Which of the following results in total absorption of an incident x-ray photon? - CORRECT
ANSWER Photoelectric interaction"
"What agency publishes radiation protection standards based on scientific research? -
CORRECT ANSWER National Council on Radiation Protection and Measurements (NCRP)"
"ALARA is an acronym for: - CORRECT ANSWER A radiation protection concept that
encourages radiation users to keep the dose to the patient as low as reasonably achievable"
"Which of the following is the basis for all radiation protection standards? - CORRECT
ANSWER Linear-nonthreshold effect"
"Which of the following means there is a safe level of radiation for certain effects and those
effects are directly proportional to the dose received when the safe level is exceeded? -
CORRECT ANSWER Linear-threshold effect"
"The lowest intensity of scatter radiation from the patient is located: - CORRECT ANSWER At a
90-degree angle from the patient"
"Minimal (M) readings on dosimeter reports mean: - CORRECT ANSWER A dose below the
sensitivity of the dosimeter has been received"
"Which of the following is the most sensitive personnel monitoring device? - CORRECT
ANSWER OSL dosimeter"
"When wearing a lead apron, a pregnant radiographer must wear the fetal badge: - CORRECT
ANSWER At the level of the abdomen - worn under the shield"
"The NCRP recommendation for dose limits for the hands, skin and feet is: - CORRECT
ANSWER 500 mSv"
"Which of the following are types of beam restricting devices? - CORRECT ANSWER
Collimators Cones Aperture diaphragms"
"Which stage of Acute Radiation Syndrome is described as false recovery? - CORRECT
ANSWER Latent"
"Which of the cardinal principles of radiation protection is used to decrease personnel exposure?
- CORRECT ANSWER Increase distance from the source of radiation Place shielding between the source and yourself Decrease the amount of time exposed"
"What unit of measurement is used for effective dose limits? - CORRECT ANSWER Gyt"
"Cell radiosensitivity is described by the: - CORRECT ANSWER Law of Bergonié and
Tribondeau" "To ensure the lifetime risk of occupationally exposed persons remains within acceptable limits,
each person cannot exceed a lifetime dose. The lifetime dose is termed the ______ dose. -
CORRECT ANSWER cumulative effective"
"The greatest cause of unnecessary radiation to patients is from: - CORRECT ANSWER repeat
exposures."
“Roentgen discovered x-rays while working with a _____ tube? - CORRECT ANSWER Crookes"
"An "electron cloud" surrounding the filament of the cathode is referred to as a - CORRECT
ANSWER Space charge"
"Free electrons of X-ray production come from the - CORRECT ANSWER Filament"
"The creation of the space charge in the X-ray tube produces: - CORRECT ANSWER thermionic
emission"
"The majority of photons in the X-ray beam are created by which process? - CORRECT
ANSWER Bremsstrahlung interactions"
"X-ray equipment capable of producing 70 kVp or more is required to have total filtration of at
least: - CORRECT ANSWER 2.5 mm Al equiv"
"The purpose of rotating the anode of the X-ray tube is to - CORRECT ANSWER Increase the
heat capacity of the anode"
"Image sharpness is determined by the - CORRECT ANSWER Size of the effective focal spot"
"Above 70 kVp, what percentage of photons is created by the bremsstrahlung process? -
CORRECT ANSWER 85%"
"The amount detail seen in the X-ray image is referred to as - CORRECT ANSWER spatial
resolution" "What type of radiation production makes up the greatest portion of the X-ray beam-
bremsstrahlung or characteristic? - CORRECT ANSWER Brehmsstrahlung"
"How much aluminum filtration must be in the x-ray tube to meet government standards? -
CORRECT ANSWER 2.5mm Al equiv"
"The anode heel effect is most pronounced when using which size of IR - CORRECT ANSWER
14x17in IR"
an object that has been in contact with pathogenic organisms called
examples it is commonly on xray table, up right Bucky, etc. - CORRECT ANSWER Fomites"
"Disease transmission
an arthropod examples insect, spider, or similar form. mosquitoes, fleas - CORRECT ANSWER
Vectors" "Often occurs when an infectious individual coughs, sneeze, speaks, or sings I am particles are
suspended in the air - CORRECT ANSWER Droplet contamination"
"The first route is by means of direct contact this transition mode touched by infected person in
such a manner that the organisms are placed in ________ contact with susceptible host -
CORRECT ANSWER Direct contact"
"The cerebrovascular accident (CVA) Is also called a - CORRECT ANSWER Stroke"
"The cuff and gauge for measuring blood pressure are called a(n): - CORRECT ANSWER
Sphygmomanometer" "The legal doctrine of respondent superior
the employer is liable for employees negligence acts that occur in the course of their work. -
CORRECT ANSWER Let the master respond"
"Malicious spreading usually refers to written information - CORRECT ANSWER Libel"
"Malicious spreading of information spread verbally - CORRECT ANSWER Slander"
"Consist of an unlawful touching of a person without consent - CORRECT ANSWER Battery"
"Maybe defined as the threat of touching in an injurious way - CORRECT ANSWER Assault"
"The unjustifiable detention of a person against his or her well - CORRECT ANSWER False
imprisonment"
"The diabetic patient who has taken insulin but no food may develop - CORRECT ANSWER
Hypoglycemia"
"Fog affects radiographic quality by causing: - CORRECT ANSWER decreased contrast"
"Motion of the patient, either voluntary or involuntary, during the exposure will result in
decreased? - CORRECT ANSWER Detail"
"A term used to describe a grainy or mottled image is - CORRECT ANSWER quantum mottle"
"one means of controlling distortion is by controlling the - CORRECT ANSWER motion"
"If the mAs is doubled, the dose to the patient will? - CORRECT ANSWER double"
"The principal means of controlling involuntary motion is to - CORRECT ANSWER use a short
exposure time"
"When a body part is dense, or has a greater atomic number, scatter radiation: - CORRECT
ANSWER is decreased"
"in the diagnostic range of kVp settings ( 50 to 100 kVp), the majority of scattered radiation will be
from which interaction with matter? - CORRECT ANSWER Compton effect"
"Total absorption of an x-ray photon by the atom of the body part is termed - CORRECT
ANSWER the photoelectric effect"
"The majority of photons that are scattered will scatter in what direction - CORRECT ANSWER
in a more forward direction"
"A transformer that has more turns in the secondary coil than in the primary coil is called a: -
CORRECT ANSWER Step-up transformer"
"What is the transformer used to boost voltage to kilovoltage levels called? - CORRECT
ANSWER Step-up transformer"
"Voltage coming to the x-ray machine is kept constant through the use of a(n): - CORRECT
ANSWER Line voltage compensator"
"A step-down transformer: - CORRECT ANSWER Steps down voltage"
"Where does thermionic emission occur? - CORRECT ANSWER Cathode"
". Which of the following devices is prereading? - CORRECT ANSWER kVp meter"
