Practice Exam #3 12-22

Question 1

This statement best defines an Annual Limit on Intake, ALI.

Answer 1

1. The amount of a given radionuclide taken into the body through either ingestion or inhalation, which would result in a committed effective dose equivalent of 5 rem.
2. The amount of a given radionuclide taken into the body through either ingestion or inhalation, which would result in a committed effective dose equivalent of 50 rems to any organ or tissue.

Question 2

Which of the following is the best definition for Derived Air Concentration, DAC?

Answer 2

Concentration of a radionuclide in air, which if breathed for 2000 hours, would result in an intake of one ALI, or 5 rem.

Question 3

One DAC-Hour is equal ___________?

Answer 3

2.5 mrem

Question 4

The DAC value listed in 10CFR20 are related to two modes of exposure, submersion or internal CDE resulting from inhalation. True or False?

Answer 4

False

Question 5

Which of the following statements best defines a Rad (radiation absorbed dose)?

Answer 5

The amount of energy from ionizing radiation in air that is equal to 100 ergs of energy being deposited.

Question 6

When determining internal dose, the tables in 10CFR20 assume that all of the organs in the body have the same radiosensitivity. True or False?

Answer 6

False

Question 7

The DAC value listed for each radionuclide in 10CFR20, Appendix B, Table 1, Column 1, is designed so that is a person breathed that concentration for 2000 hours during the course of a year, they would receive how much exposure?

Answer 7

1 ALI or 5000 mrem

Question 8

From the list below select the methods that can be used to assess the amount of radioactive material an individual may have been exposed to internally.

Answer 8

1. Take air samples to determine the concentrations of radioactive material in the air that the individual was breathing
2. Determine the quantities of radionuclides in the body
3. Determine the quantities of radionuclides excreted from the body

Question 9

An air sample was taken in the work area where individuals were repairing a valve. The air sample indicated 2.4 DACs of CO-60 was in the work place. If the crew was in the area for 2 hours how much dose would they receive from the internal exposure of Co-60?

Answer 9

12 mrem

Question 10

The time is takes for one half of the originally deposited radionuclide to be eliminated from the body is?

Answer 10

Biological half-life

Question 11

Based on 10CFR20.1502, licensee must monitor declared pregnant women likely to receive a dose of __________ during the entire pregnancy?

Answer 11

100 mrem or .1 rem