LMRT Mock Board Exam Prep Questions And
Answers|Latest Update
When performing an AP projection of the femur, what is the purpose of internal rotation of the
leg?
A. To compensate for anteversion of the proximal femur
B. It is more comfortable for the patient
C. To place the patella in the center of the distal femur
D. To better demonstrate the intercondylar fossa A. To compensate for anteversion of the
proximal femur
Which of the listed x-ray generator types has the least amount of voltage ripple?
A. Three-phase, twelve pulse
B. Single-phase, half-wave
C. Single-phase, full-wave
D. Three-phase, six-pulse A. Three-phase, twelve pulse
An x-ray of the sternum uses a 72-inch source-to-image distance (SID) and a 10-inch by 12-inch
image receptor. If the image of the sternum measures 9 cm and the actual sternum measures 6
cm, what is the magnification factor?
A. 54
B. 1.5
C. 8
D. 0.67 B. 1.5
A Picture Archiving and Communication System (PACS) network is used to connect which three
of the following? (Select three)
, LMRT Mock Board Exam Prep Questions And
Answers|Latest Update
I. Radiologist reading station
II. Imaging Equipment
III. PACS servers
IV. Electronic Medical Record (EMR) I, II and III
Federal law on radiation protection requires which two of the following? (Select two)
I. Signage for radiation areas
II. Maintaining personnel dose records
III. Publication of personnel dose records
IV. Dosimeters for all employees exposed to radiation I and II
Because of the binding energy of a K-shell tungsten atom, the minimum electron energy
necessary to create a characteristic photon is:
A. 80 kiloelectron volts (keV)
B. 73 kiloelectron volts (keV)
C. 69.5 kiloelectron volts (keV)
D. 55 kiloectron volts (keV) C. 69.5 kiloelectron volts (keV)
Walls that are considered to be secondary barriers should be:
A. 0.25 mm of lead thickness and be 1.5 meters (5 feet) tall
B. 0.4 mm of lead thickness and be 1.5 meters (5 feet) tall
C. 0.8 mm of lead thickness and be 2.1 meters (7 feet) tall
, LMRT Mock Board Exam Prep Questions And
Answers|Latest Update
D. 1.6 mm of lead thickness and be 2.1 meters (7 feet) tall C. 0.8 mm of lead thickness
and be 2.1 meters (7 feet) tall
The Heimlich maneuver (abdominal thrust) is used for someone who:
A. Has dyspnea while lying supine
B. Is choking
C. Is in cardiac arrest
D. Has a nosebleed B. Is choking
Expectant mothers who are technologists should wear a fetal dosimeter at what location?
A. At the collar
B. At the thyroid
C. At the waist
D. Outside the apron C. At the waist
Diabetes mellitus is a metabolic disease resulting from a chronic disorder of:
A. Fat metabolism
B. Bile production
C. Renin production
D. Blood glucose metabolism D. Blood glucose metabolism
If the generator you are using has 1000 milliampere (mA) capacity and your technique is 20
milliampere-seconds (mAs) at 74 kilovoltage peak (kVp), what is the shortest exposure time
possible?
, LMRT Mock Board Exam Prep Questions And
Answers|Latest Update
A. 0.02 seconds
B. 0.2 seconds
C. 50 seconds
D. 5.0 seconds A. 0.02 seconds
The main purpose of adding filtration to the x-ray tube is to:
A. Decrease occupational dose
B. Increase spatial resolution
C. Decrease patient dose
D. Increase image contrast C. Decrease patient dose
An anteroposterior (AP) chest x-ray was obtained at a 40-inch source-to-image distance (SID),
3.5 milliampere-seconds (mAs), 110 kilovoltage peak (kVp), and a 12:1 grid. Which technical
factor change would increase image receptor exposure?
A. Decreased kVp
B. Increased SID
C. Decreased mAs
D. Decreased grid ratio D. Decreased grid ratio
Radiation safety standards require that collimators be accurate within what percentage of the
source-to-image distance (SID)?
A. 2%
B. 10%
Answers|Latest Update
When performing an AP projection of the femur, what is the purpose of internal rotation of the
leg?
A. To compensate for anteversion of the proximal femur
B. It is more comfortable for the patient
C. To place the patella in the center of the distal femur
D. To better demonstrate the intercondylar fossa A. To compensate for anteversion of the
proximal femur
Which of the listed x-ray generator types has the least amount of voltage ripple?
A. Three-phase, twelve pulse
B. Single-phase, half-wave
C. Single-phase, full-wave
D. Three-phase, six-pulse A. Three-phase, twelve pulse
An x-ray of the sternum uses a 72-inch source-to-image distance (SID) and a 10-inch by 12-inch
image receptor. If the image of the sternum measures 9 cm and the actual sternum measures 6
cm, what is the magnification factor?
A. 54
B. 1.5
C. 8
D. 0.67 B. 1.5
A Picture Archiving and Communication System (PACS) network is used to connect which three
of the following? (Select three)
, LMRT Mock Board Exam Prep Questions And
Answers|Latest Update
I. Radiologist reading station
II. Imaging Equipment
III. PACS servers
IV. Electronic Medical Record (EMR) I, II and III
Federal law on radiation protection requires which two of the following? (Select two)
I. Signage for radiation areas
II. Maintaining personnel dose records
III. Publication of personnel dose records
IV. Dosimeters for all employees exposed to radiation I and II
Because of the binding energy of a K-shell tungsten atom, the minimum electron energy
necessary to create a characteristic photon is:
A. 80 kiloelectron volts (keV)
B. 73 kiloelectron volts (keV)
C. 69.5 kiloelectron volts (keV)
D. 55 kiloectron volts (keV) C. 69.5 kiloelectron volts (keV)
Walls that are considered to be secondary barriers should be:
A. 0.25 mm of lead thickness and be 1.5 meters (5 feet) tall
B. 0.4 mm of lead thickness and be 1.5 meters (5 feet) tall
C. 0.8 mm of lead thickness and be 2.1 meters (7 feet) tall
, LMRT Mock Board Exam Prep Questions And
Answers|Latest Update
D. 1.6 mm of lead thickness and be 2.1 meters (7 feet) tall C. 0.8 mm of lead thickness
and be 2.1 meters (7 feet) tall
The Heimlich maneuver (abdominal thrust) is used for someone who:
A. Has dyspnea while lying supine
B. Is choking
C. Is in cardiac arrest
D. Has a nosebleed B. Is choking
Expectant mothers who are technologists should wear a fetal dosimeter at what location?
A. At the collar
B. At the thyroid
C. At the waist
D. Outside the apron C. At the waist
Diabetes mellitus is a metabolic disease resulting from a chronic disorder of:
A. Fat metabolism
B. Bile production
C. Renin production
D. Blood glucose metabolism D. Blood glucose metabolism
If the generator you are using has 1000 milliampere (mA) capacity and your technique is 20
milliampere-seconds (mAs) at 74 kilovoltage peak (kVp), what is the shortest exposure time
possible?
, LMRT Mock Board Exam Prep Questions And
Answers|Latest Update
A. 0.02 seconds
B. 0.2 seconds
C. 50 seconds
D. 5.0 seconds A. 0.02 seconds
The main purpose of adding filtration to the x-ray tube is to:
A. Decrease occupational dose
B. Increase spatial resolution
C. Decrease patient dose
D. Increase image contrast C. Decrease patient dose
An anteroposterior (AP) chest x-ray was obtained at a 40-inch source-to-image distance (SID),
3.5 milliampere-seconds (mAs), 110 kilovoltage peak (kVp), and a 12:1 grid. Which technical
factor change would increase image receptor exposure?
A. Decreased kVp
B. Increased SID
C. Decreased mAs
D. Decreased grid ratio D. Decreased grid ratio
Radiation safety standards require that collimators be accurate within what percentage of the
source-to-image distance (SID)?
A. 2%
B. 10%
