3 - Unit review exercises Flashcards
1
Q
- (632) What should the installation radiation safety officer (IRSO) develop for each dose
equivalent category of the Radiation Dosimetry Laboratory (RDL) Listing 1499?
a. As low as reasonably achievable (ALARA) training requirements.
b. Investigation action levels.
c. Maximum exposure rates.
d. Installation activity levels
A
b. Investigation action levels.
2
Q
- (633) A common problem you will likely encounter when employing a scintillation
instrument that uses a thin window is the
a. tendency to get dirty and provide false measurements.
b. susceptibility to light leaks caused by small holes in the window.
c. textured glass may cause inaccurate readings.
d. susceptibility to cold temperatures that can cause the window to constrict and crack.
A
b. susceptibility to light leaks caused by small holes in the window.
3
Q
- (633) When using the ADM-300 XP–100, hold the probe
a. parallel to the surface and use a fast and steady sweeping motion.
b. parallel to the surface and use a slow and steady sweeping motion.
c. vertical to the surface and use a fast and steady sweeping motion.
d. vertical to the surface and use a slow and steady sweeping motion.
A
d. vertical to the surface and use a slow and steady sweeping motion.
4
Q
- (633) Which radiation measuring device is an example of a gamma-spectrometer?
a. RADiation Detection COmpany (RADeCO) sampler.
b. SAM 940.
c. Geiger-Mueller (GM).
d. Victoreen 451P.
A
b. SAM 940.
5
Q
- (634) What type of testing do you conduct on unsealed radiation sources?
a. Leak.
b. Air.
c. Swipe.
d. Bulk.
A
c. Swipe.
6
Q
- (634) The most effective means of taking a swipe sample is to
a. add a few drops of deionized water (DI) to dampen it, increasing its efficiency up to 90%.
b. add a few drops of DI to dampen it, increasing its efficiency by 10%.
c. use a dry swipe only, increasing its efficiency up to 90%.
d. use a dry swipe only, increasing its efficiency by 10%.
A
add a few drops of deionized water (DI) to dampen it, increasing its efficiency up to 90%.
7
Q
- (634) When swipe testing a radiological source, what is the first step after you have
prepared and checked the field blank (field paper)?
a. Apply a few drops of deionized (DI) water until the wipe is damp but not soaked.
b. Place a small “X” in pencil on the outer edge of the filter paper on the side to touch the
source.
c. In a slow back and forth “S” motion applying moderate pressure, swipe an area of 100
square centimeters (cm2 ).
d. Check the filter paper with an ADM 300 with probe or an instrument capable of measuring
beta/gamma to establish background reading
A
c. In a slow back and forth “S” motion applying moderate pressure, swipe an area of 100
8
Q
- (634) What is the total surface area covered, in square centimeters (cm2
), during a swipe
sample of a sealed radiological source?
a. 10 square centimeters (cm2
b. 30 cm2
c. 100 cm2
d. 300 cm2
A
c. 100 cm2
9
Q
- (635) What type of survey instrument do you use to monitor external radiation levels for
packages that contain radioactive material (RAM)?
a. Proportion detector.
b. Portable ion chamber.
c. Scintillation instrument.
d. Geiger-Mueller (GM) detector.
A
b. Portable ion chamber.
10
Q
- (635) When monitoring a radioactive material (RAM) shipment for external levels of
radiation, at what distance from the surface of the package are readings taken?
a. 100 centimeters (cm).
b. 50 cm.
c. 20 cm.
d. 10 cm
A
d. 10 cm
11
Q
- (636) There is greater concern for public exposure to radiation from medical X-ray
operations as compared to industrial X-ray operations because
a. medical X-rays are more harmful than industrial X-rays.
b. industrial X-rays are always conducted in shielded facilities.
c. there are less safety measures to protect the public from medical X-rays.
d. of the proximity of patients and visitors in the medical X-ray environment.
A
d. of the proximity of patients and visitors in the medical X-ray environment.
12
Q
- (636) The bioenvironmental engineering flight’s (BE) role in the ionizing radiation
quality assurance program is to
a. verify the training of all X-ray technicians.
b. evaluate the direct output of X-ray machines.
c. verify that the direct output of X-ray machines has been evaluated.
d. perform scatter surveys on medical X-ray units to ensure all personnel are not exposed to unnecessary radiation.
A
d. perform scatter surveys on medical X-ray units to ensure all personnel are not exposed to unnecessary radiation.
13
Q
- (636) The easiest and most accurate method you can use to measure ionizing radiation
produced by medical X-ray machines is using
a. a portable instrument such as a Geiger-Muller (GM) detector.
b. an electronic portable dosimeter (EPD).
c. thermoluminscent dosimeters (TLD).
d. theoretical worst-case calculations.
A
c. thermoluminscent dosimeters (TLD).
14
Q
- (636) When conducting medical X-ray machine scatter radiation surveys, you recreate the
scatter effect of the radiation by
a. placing a one gallon-plastic container filled with water in line with the beam.
b. placing a one gallon-plastic container filled with sand in line with the beam.
c. placing a specially designed mannequin on the X-ray table.
d. having an X-ray technician lie down on the X-table.
A
a. placing a one gallon-plastic container filled with water in line with the beam.
15
Q
- (636) Once your radiation storage and use area measurements have been collected in any
hour, what criteria in millirem (mrem) are they compared to?
a. 100 mrem.
b. 30 mrem.
c. 10 mrem.
d. 2 mrem.
A
d. 2 mrem.
