LMRT STATE EXAM ACTUAL EXAM 200 QUESTIONS AND CORRECT DETAILED ANSWERS|AGRADE (NEWEST VERSION)
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LMRT STATE EXAM ACTUAL EXAM 200 QUESTIONS AND CORRECT DETAILED ANSWERS|AGRADE (NEWEST VERSION)
LMRT STATE EXAM 2023-2024 ACTUAL EXAM 200
QUESTIONS AND CORRECT DETAILED
ANSWERS|AGRADE (NEWEST VERSION)
According to the Bergonie Tribondeau law, which of the following types of cells
are most radiosensitive?
A.) Brain cells
B.) Embryonic tissue cells
C.) Cells of the gastric mucosa
D.) Skin cells - ANSWER- Embryonic tissue cells
Which type of x-ray photon interaction with the body is primarily responsible for
the radiation dose absorbed by the patient?
A.) Compton
B.) Photoelectric
C.) Coherent
D.) Characteristic - ANSWER- Photoelectric
What is the NCRP recommendation for the lead equivalency of aprons used for
personnel protection?
A.) 0.05 mm
B.) 0.25mm
C.) 0.5 mm
D.) 1.0mm - ANSWER- 0.5mm
What is erythema, as it relates to radiation exposure?
A.) Loss of hair caused by a high radiation dose
B.) Loss of hair caused by a long-term low radiation dose
C.) Reddening of the skin caused by high radiation dose
D.) Reddening of the skin caused by long-term low radiation dose - ANSWERReddening of the skin caused by high radiation dose
What is the guiding philosophy of radiation protection?
A.) ALARMA- as long as radiographs are made accessible
B.) ALARA- as low as reasonably achievable
C.) ALAIS- as long as ionizations are small
D.) ALAP- as low as possible - ANSWER- ALARA- as low as reasonably
achievable
Which of the following statements reflects current scientific opinion regarding the
effects of diagnostic levels of ionizing radiation?
A.) It is carcinogenic after a certain number of examinations have been preformed
B.) Spontaneous abortion will occur if the patient is pregnant
C.) Depression of the white blood cell count is followed by acute gastrointestinal
distress
D.) There is an increase risk of cancer, leukemia, birth defects and cataracts. -
ANSWER- There is an increase risk of cancer, leukemia, birth defects and
cataracts.
Which of the following changes will decrease patient dose?
1. Using a faster speed class imaging system
2. Increasing the kVp using the 15% rule, while decreasing the mAs to compensate
3. Increasing the grid ratio to a 16:1 ratio
A.) 1 and 2 only
B.) 1 and 3 only
C.) 2 and 3 only
D.) 1, 2, and 3 - ANSWER- 1 and 2 only
When radiation exposure occurs during pregnancy, the greatest risk of birth defects
occur when the exposure:
1. Exceeds 5 rad to the uterus
2. Occurs within the first trimester of pregnancy
3. Occurs within the third trimester of pregnancy
A.) 1 and 2 only
B.) 1 and 3 only
C.) 2 and 3 only
D.) 1, 2, and 3 - ANSWER- 1 and 2 only
At what kVp levels do Compton interactions occur?
A.) They do not occur with with x-ray exposure
B.) They occur below the diagnostic radiology kVp range
C.) They occur above the diagnostic radiology kVp range
D.) They occur throughout the diagnostic radiology kvp range. - ANSWER- They
occur throughout the diagnostic radiology kvp range.
What is the principal source of scatter radiation in radiography?
A.) the tube housing
B.) The Patient
C.) The IR
D.) The Collimator - ANSWER- The patient
What are the four essential elements required for x-ray production?
A.) A target, a vacuum, an electron source, and a high potential difference
B.) A target, an electron source, an inert gas environment, and a high potential
difference
C.) An electron source, a magnetic field, a resistance-free path, and a target.
D.) An electron source, an electric field, a circuit and a target - ANSWER- A
target, a vacuum, an electron source, and a high potential difference
The greatest portion of the x-ray beam is made up of :
A.) Characteristic radiation
B.) Bremsstrahlung radiation
C.) electrons
D.) heat - ANSWER- Bremsstrahlung radiation
The penetrating power of the x-ray beam is controlled by varying the:
A.) anode angle
B.) anode speed
C.) milliamperage (mA)
D.) Kilovoltage (kVp) - ANSWER- Kilovoltage (kVp)
Which of the following functions involve the autotransformer?
A.) kVp selection
B.) mA selection
C.) exposure time selection
D.) Automated exposure control - ANSWER- kVp selection
What is the IR that is used for computed radiography?
A.) Direct-conversion flat panel detector
B.) Indirect-conversion flat panel detector
C.) Rare earth intensifying screen
D.) Photostimulable Phosphor (PSP) plate - ANSWER- Photostimulable Phosphor
(PSP) plate
Nearly all new x-ray machines manufactured today use _________________
generators
A.) single-phase
B.) Three-phase, six-pulse
C.) Three-phase, 12-pulse
D.) High-frequency - ANSWER- High-frequency
The target of the x-ray tube is made of:
A.) tungsten
B.) glass
C.) Stainless steel
D.) Fluorescent phospors - ANSWER- tungsten
What is the standard control limit for the field light to radiation field alignment
test?
A.) exact alignment
B.) +/- 1% of SID
C.) +/- 2% of SID
D.) +/- 5% of SID - ANSWER- +/- 2% of SID
What is the standard control limit for the beam (Central ray) alignment test?
A.) exact alignment
B.) within 1 degree of perpendicular
C.) within 2 degrees of perpendicular
D.) within 5 degrees of perpendicular - ANSWER- within 1 degree of
perpendicular
How often should lead aprons and gloves be checked for cracks or holes?
A.) every 3 months
B.) every 6 months
C.) every 9 months
D.) every 12 months - ANSWER- every 6 months
How can detector fog be prevented when using computed radiography cassettes
A.) Use the maximum SID
B.) Apply close collimation
C.) Protect the cassette before and after exposure
D.) Select the optimum kVp - ANSWER- Protect the cassette before and after
exposure
Which of the following will result in increase receptor exposure?
1. Increase mA
2. Increase exposure time
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