Sealed Source Users Quiz

This quiz is only for those planning to use Sealed Sources at the University of Colorado (Boulder, Denver, or Colorado Springs campuses) Please fill out this quiz completely and then submit the form to Health Physics to fulfill your training requirement. If you have any questions, send e-mail to HPL.

If you have difficulty submitting the quiz, you may print it out, complete it, and then return it to the Radiation Safety Office at 413 UCB or FAX it to (303) 492-1322 for grading.
NOTE that completion of this quiz is not the same as applying for a dosimeter. To be issued a dosimeter, please complete the dosimeter application and send it to the Radiation Safety Office.

Please enter your information here:

Name (first, MI, last):

What lab are you in? (please enter the name of the PI who is licensed for the source(s) you are planning to use)

Principal Investigator:


If you are taking this quiz because you will be using sealed sources as part of a class, please list the course number here (ex: PHYS 2150):

What's your e-mail address?

Please check the best answer for each question.

1. A major difference between working with sealed sources and working with loose isotope is:

2. Which of the following is NOT a type of sealed source:

3. A good way to keep your dose ALARA is to:

4. For a sealed source which emits beta particles, the following shielding is the best choice:

5. The dosimeter should be worn:

6. True or false: In every laboratory using radioactive sources, there should be clearly displayed a list of people, including their phone numbers, who are to be called in case of a NON life-threatening emergency.

7. As a researcher, you want to move a Tier I source from one building on campus to another building. What arrangements must you make?

8. How long is the suggested use period for a Tier II sealed source?

9. What level of leakage from a source will require a source to be removed from use?

10. True or false: Individuals working with Tier I sealed sources require both a film badge dosimeter and frequent bioassays.

11. The approximate rate of exposure from a sealed source emitting gamma radiation:

12. True or false: There is no chance of any external exposure from a Tier II source

13. True or false: An individual sealed source may emit more than one type of radiation.

14. True or false: All sealed sources, Tier I and Tier II, must be signed out when they are removed from storage for use.

15. Exposure is measured in units of:

16. A leak test of a sealed source involves:

17. Sealed sources can emit all but one of the following types of radiation. Which is the one that cannot be emitted?

18. Radiation survey meters are required to becalibrated:

19. All personnel using radiation-producing machines and/or radioactive materials at CU must complete refresher training:

20. True or False: The safe use of radioactive materials is best accomplished when the end user and radiation safety personnel act in cooperation


If you have worked with radiation at any institution other than the University of Colorado (Boulder, Denver, or Colorado Springs campuses only) since beginning your work here, it is your responsibility to notify Health Physics so that your lifetime dose can be tracked. Please answer the questions below before submitting your quiz.

I have not worked with radiation at an institution other than CU since beginning at CU. (If you checked this box, thanks for your time -- please go ahead and submit your quiz).

I have worked at the following institution(s) other than CU since beginning here at CU. (separate information by commas).

Name/Address of Institution(s):

Radiation Safety Contact(s):

Type(s) of radiation used:

Thanks for your time!