LMRT Mock Board Exam Prep
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
Increasing diagnostic filtration from 2.5 mm to 3.5 mm will have what effect on x-ray
beam intensity?
A. Increase in x-ray beam intensity
B. Decrease in x-ray beam intensity
C. No change in x-ray beam intensity - ✔️✔️B. Decrease in x-ray beam intensity
What is the minimum requirement for the evaluation of holes and cracks of shielding
accessories?
A. Annually
B. Bi-annually
C. Semi-annually
D. Monthly - ✔️✔️A. Annually
A Picture Archiving and Communication System (PACS) network is used to connect
which three of the following? (Select three)
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
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?
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%
C. 5%
D. 25% - ✔️✔️A. 2%
Which of the following three signs/symptoms below that would indicate a patient is
going into shock? (Select three)
I. Increased urination
II. Pallor
III. Coughing
IV. Increased heart rate
V. Diaphoresis - ✔️✔️II, IV and V
The natural curve of the thoracic spine is:
A. Toward the dominant side
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
Increasing diagnostic filtration from 2.5 mm to 3.5 mm will have what effect on x-ray
beam intensity?
A. Increase in x-ray beam intensity
B. Decrease in x-ray beam intensity
C. No change in x-ray beam intensity - ✔️✔️B. Decrease in x-ray beam intensity
What is the minimum requirement for the evaluation of holes and cracks of shielding
accessories?
A. Annually
B. Bi-annually
C. Semi-annually
D. Monthly - ✔️✔️A. Annually
A Picture Archiving and Communication System (PACS) network is used to connect
which three of the following? (Select three)
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
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?
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%
C. 5%
D. 25% - ✔️✔️A. 2%
Which of the following three signs/symptoms below that would indicate a patient is
going into shock? (Select three)
I. Increased urination
II. Pallor
III. Coughing
IV. Increased heart rate
V. Diaphoresis - ✔️✔️II, IV and V
The natural curve of the thoracic spine is:
A. Toward the dominant side
