Au Radiology Resident's Training Course Quiz

20 Questions | By Zhizhang | Last updated: Oct 5, 2015 | Total Attempts: 48

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UCLA Radiation Safety

Questions and Answers

1.

Gas-filled detectors are highly efficient for detection of high-energy gamma photons and x-rays as well as low-energy beta particles.
- A.
  
  True
- B.
  
  False
2.

Which of the following radiation detectors are classified as ionization chambers?
- A.
  
  Sodium iodide (NaI) probe
- B.
  
  Geiger counter
- C.
  
  Dose calibrator
3.

Because of the near-maximal ionization of the gas molecules in a Geiger counter in response to each radiation event interacting with a gas molecule in the detector, Geiger counters cannot be used to distinguish between types of radiation.
- A.
  
  True
- B.
  
  False
4.

Select the three most effective ways to reduce exposure when working with radioactivity.
- A.
  
  Reduce the time spent in the vicinity of a radioactive source.
- B.
  
  Use soap when washing your hands.
- C.
  
  Maintain the maximum possible distance from the source.
- D.
  
  Shield the radioactive source.
- E.
  
  Wear a face mask.
5.

The maximum allowable exposure to the household contacts of a patient receiving radioactivity is 5 mSv (500 mrem).
- A.
  
  True
- B.
  
  False
6.

After the discovery of a medical event, the licensee is required to contact the NRC/Agreement State no later than 5 calendar days.
- A.
  
  True
- B.
  
  False
7.

In the event of handling a radioactive spill, what equipment will you not need?
- A.
  
  Swipes
- B.
  
  Appropriate survey meter
- C.
  
  Personal protective equipment
- D.
  
  Dose calibrator
8.

Which section of 10 CFR 35 is applicable to I-131 thyroid ablation treatments for which a written directive is required?
- A.
  
  10 CFR 35.100
- B.
  
  10 CFR 35.200
- C.
  
  10 CFR 35.300
9.

When taking into account quality factors values for equivalent dose, gammas, x-rays and betas have a value of 1.
- A.
  
  True
- B.
  
  False
10.

Which of the following statements are true about radionuclide generators?

Discuss
- A.
  
  The parent nuclide always has a shorter half-life than the daughter nuclide.
- B.
  
  If the half-life of the parent nuclide is 50 times greater than the half-life of the daughter nuclide, the equilibrium portion of the activity curve is basically flat and is categorized as “secular” equilibrium.
- C.
  
  The parent nuclide is less tightly bound to the column than the daughter nuclide
- D.
  
  None of the above
11.

Technetium-99m and molybdenum-99 are good examples of which type of equilibrium?
- A.
  
  Transient equilibrium in which the parent half-life is 10 to 100 times that of the daughter.
- B.
  
  Secular equilibrium in which the parent half-life is more than 100 times that of the daughter.
12.

Of the three types of impurities present in a Tc-99m elution, which QC test for these impurities is optional?
- A.
  
  Mo-99 Breakthrough to test for radionuclidic impurity.
- B.
  
  Hydrolyzed Reduced Tc to test for radiochemical impurity.
- C.
  
  Aluminum Ion Breakthrough to test for chemical impurity.
13.

During an equilibrium state within a 99Mo–99mTc generator, the total activity of 99mTc is always less than the total activity of 99Mo because 14% of 99Mo decays directly to 99Tc, bypassing the metastable state.
- A.
  
  True
- B.
  
  False
14.

DOT hazardous materials training is required within 90 days of employment and retraining must be received at least once every 3 years.
- A.
  
  True
- B.
  
  False
15.

The radiation dose rate at any point on the surface of an excepted (limited quantity) package of class 7 radioactive material cannot exceed what value?
- A.
  
  0.5 mrem/hr
- B.
  
  1 mrem/hr
- C.
  
  50 mrem/hr
- D.
  
  200 mrem/hr
16.

Which option is NOT a Type A package labeling requirement?
- A.
  
  Mixtures of radionuclides must appear in order of decreasing radiotoxicity as space permits
- B.
  
  The activity must be in SI units of Becquerel (Bq, MBq, GBq)
- C.
  
  The Transport Index (TI), defined the maximum dose rate in mrem/hr at 1 meter from the package surface, is required only on Yellow II and Yellow III Type A packages.
- D.
  
  All Type A packages (White I, Yellow II, Yellow III) require a Transport Index
17.

Shipper must provide a telephone number that can be contacted in case of emergency during normal business hours only.
- A.
  
  True
- B.
  
  False
18.

Radiation surveys must be performed within how many hours of receipt during normal working hours?
- A.
  
  30 minutes
- B.
  
  3 hours
- C.
  
  5 hours