LMRT Mock Board Exam Prep Questions
and Answers
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 - Answer-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 - Answer-A. Annually
,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 - Answer-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 - Answer-B. 1.5
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) - Answer-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 - Answer-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) - Answer-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 - Answer-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 - Answer-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 - Answer-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 - Answer-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 - Answer-A. 0.02 seconds
The main purpose of adding filtration to the x-ray tube is to:
A. Decrease occupational dose
and Answers
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 - Answer-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 - Answer-A. Annually
,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 - Answer-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 - Answer-B. 1.5
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) - Answer-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 - Answer-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) - Answer-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 - Answer-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 - Answer-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 - Answer-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 - Answer-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 - Answer-A. 0.02 seconds
The main purpose of adding filtration to the x-ray tube is to:
A. Decrease occupational dose
