ARRT SAFETY EXAMS SCRIPT ANSWERS AND
QUESTIONS SET A+
✔✔Diagnostic x-radiation may be correctly described as
low energy, low LET
low energy, high LET
high energy, low LET
high energy, high LET - ✔✔low energy, low LET
✔✔In radiation protection, the product of absorbed dose and the correct weighting
factors is used to determine
air kerma
Gy
Sv
Bq - ✔✔Sv
✔✔What is the approximate ESE for the average AP lumbar spine radiograph?
1.0 mGy
1.75 mGy
2.75 mGy
4.0 mGy - ✔✔2.75 mGy
✔✔The tabletop intensity of the fluoroscopic beam must not exceed 100 mGya/min (10
R/min,) or 21 mGya/min/mA (2.1 R/min/mA). - ✔✔tabletop intensity of high level control
fluoroscopy must not exceed 200 mGya/min (20 R/min)
✔✔Any wall that the useful x-ray beam can be directed toward is called a
secondary barrier
primary barrier
leakage barrier
scattered barrier - ✔✔primary barrier
, ✔✔What is the intensity of scattered radiation perpendicular to and 1 m from a patient
compared with the useful beam at the patient's surface?
0.01%
0.1%
1.0%
10.0% - ✔✔.1% - at 1 m from the patient, the intensity is reduced by a factor of 1,000 to
about 0.1% of the original intensity.
✔✔Secondary radiation barriers usually require the following thickness of shielding:
1/4-inch lead
1/8-inch lead
1/16-inch lead
1/32-inch lead - ✔✔1/32-inch lead
✔✔The term effective dose refers to
A
whole-body dose
B
localized organ dose
C
genetic effects
D
somatic and genetic effects - ✔✔whole body dose
✔✔What is the unit for biological dose? - ✔✔relative biologic effectiveness
✔✔Unit of exposure dose of gamma or xrays - ✔✔coulomb per kilogram
✔✔Which device alerts the radiologist that 5 minutes of fluoror has elapsed? -
✔✔cumulative timer
✔✔which of the following definitions describes equivalent dose
-max dose a body can tolerate
-dose not expected to produce significant effects
-dose worker will receive in a year
-max dose radiation monitor records - ✔✔dose not expected to produce significant
effects
✔✔the optically stimulated luminescence dosimeter uses which of the following to
detect radiation? - ✔✔aluminum oxide
QUESTIONS SET A+
✔✔Diagnostic x-radiation may be correctly described as
low energy, low LET
low energy, high LET
high energy, low LET
high energy, high LET - ✔✔low energy, low LET
✔✔In radiation protection, the product of absorbed dose and the correct weighting
factors is used to determine
air kerma
Gy
Sv
Bq - ✔✔Sv
✔✔What is the approximate ESE for the average AP lumbar spine radiograph?
1.0 mGy
1.75 mGy
2.75 mGy
4.0 mGy - ✔✔2.75 mGy
✔✔The tabletop intensity of the fluoroscopic beam must not exceed 100 mGya/min (10
R/min,) or 21 mGya/min/mA (2.1 R/min/mA). - ✔✔tabletop intensity of high level control
fluoroscopy must not exceed 200 mGya/min (20 R/min)
✔✔Any wall that the useful x-ray beam can be directed toward is called a
secondary barrier
primary barrier
leakage barrier
scattered barrier - ✔✔primary barrier
, ✔✔What is the intensity of scattered radiation perpendicular to and 1 m from a patient
compared with the useful beam at the patient's surface?
0.01%
0.1%
1.0%
10.0% - ✔✔.1% - at 1 m from the patient, the intensity is reduced by a factor of 1,000 to
about 0.1% of the original intensity.
✔✔Secondary radiation barriers usually require the following thickness of shielding:
1/4-inch lead
1/8-inch lead
1/16-inch lead
1/32-inch lead - ✔✔1/32-inch lead
✔✔The term effective dose refers to
A
whole-body dose
B
localized organ dose
C
genetic effects
D
somatic and genetic effects - ✔✔whole body dose
✔✔What is the unit for biological dose? - ✔✔relative biologic effectiveness
✔✔Unit of exposure dose of gamma or xrays - ✔✔coulomb per kilogram
✔✔Which device alerts the radiologist that 5 minutes of fluoror has elapsed? -
✔✔cumulative timer
✔✔which of the following definitions describes equivalent dose
-max dose a body can tolerate
-dose not expected to produce significant effects
-dose worker will receive in a year
-max dose radiation monitor records - ✔✔dose not expected to produce significant
effects
✔✔the optically stimulated luminescence dosimeter uses which of the following to
detect radiation? - ✔✔aluminum oxide
