XT 121 RTBC RADIATION PROTECTION
DEVICES QUESTIONS AND ANSWERS
100% CORRECT
Radiation equipment survey devices are designed to evaluate which of the following? -
ANSWER-Radiation output of x-ray machines
Environmental radiation survey instruments are designed to evaluate which of the
following? - ANSWER-Radioactive contamination
What are personal dosimetry devices designed to evaluate? - ANSWER-Occupational
radiation dose
What type of radiation detection instrument is used to check the milliamperage (mA)
and kilovoltage peak (kVp) accuracy of an x-ray machine? - ANSWER-Equipment
survey device
What type of radiation detection instrument measures the dose to a radiographer? -
ANSWER-Personal dosimetry device
Who is qualified to operate Equipment Survey devices? - ANSWER-Medical Physicists
Who is required to wear personal dosimetry devices? - ANSWER-Anyone that is
exposed to ionizing radiation as a part of their occupation
Which of the following is a unit of measurement that a radiation detection device can
convert ionizing radiation into? - ANSWER-Milligray per hour (mGy/hr)
In order to be measured, radiation must interact with the: - ANSWER-Detector
What class of radiation detection instruments are used to evaluate the effectiveness of
lead shielding installed in the walls of an x-ray room? - ANSWER-Environmental survey
devices
The radiation-sensitive portion of an ionization chamber is composed of: - ANSWER-Air
A radiation measurement is acquired by an ionization chamber when radiation: -
ANSWER-Ionizes the air in the chamber
An ionization chamber calibrated to measure air kerma will display units of: - ANSWER-
Gray (Gy)
, A radiation detection instrument measuring the equivalent dose rate will display units of:
- ANSWER-Sieverts per hour (Sv/hr)
What is the unit of measurement of exposure? - ANSWER-Coulombs per kilogram
(C/kg)
A photoconductive material is used in radiation detectors to convert: - ANSWER-X-rays
into an electrical signal
Which statement describes the major difference between scintillation detectors and
semiconductor detectors? - ANSWER-Semiconductor detectors do not create visible
light
When a semiconductor is used to measure the range of photon energies produced by a
radionuclide, what unit of measurement may be displayed on the output screen? -
ANSWER-Kilo-electron volts (keV)
What is the following device used for?
(John Smith X-ray) - ANSWER-Occupational Dosimetry
When processing thermoluminescent dosimeters (TLD), the stored energy is released
from the crystal in response to: - ANSWER-Heat
What is an optically stimulable luminescent (OSL) dosimeter generally used to
determine? - ANSWER-Total occupational dose over several months
When processing an optically stimulable luminescent dosimeter (OSL), the stored
radiation energy is released from the crystal in response to: - ANSWER-Laser light
Aluminum oxide is a crystalline material used for which of these radiation-monitoring
devices? - ANSWER-Optically Stimulable Luminescent Dosimeter (OSL)
Which component of a semiconductor detector creates the initial electrical signal? -
ANSWER-Photoconductor crystal
In the following illustration, what component represents the semiconductor layer of the
semiconductor detector? (IMAGE 2 BARS) - ANSWER-Component (A)
Which of the following is a type of ionization chamber? - ANSWER-Geiger (GM)
Counter
A pocket ionization chamber is used for which of the following? - ANSWER-Personal
dosimetry
The device in the following image is typically used for which of the following? -
ANSWER-Personal dosimetry
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