Midterm ch. 5

Question 1

1. When laser light is incident on the sensing material in an OSL dosimeter, the material:

Answer 1

A. Becomes luminescent in proportion to the amount of radiation exposure received

Question 2

2. Which of the following chemical compounds functions as the sensing material in a thermoluminescent dosimeter?

Answer 2

C. Lithium fluoride

Question 3

3. During routine radiographic procedures, when a protective apron is not being worn, the primary personnel dosimeter should be attached to the clothing on the front of the body at:

Answer 3

A. Collar level to approximate the location of maxi­mal radiation dose to the thyroid and the head and neck

Question 4

4. Which of the following requirements should radiation survey instruments fulfill?
5. Instruments must be reliable so that radiation exposure or exposure rate in a given area can be accurately assessed.
6. Instruments must be durable enough to withstand normal use.
7. Instruments should interact with ionizing radiation similar to the way in which human tissue reacts.

Answer 4

1, 2, and 3

Question 5

5. During diagnostic imaging procedures, how may the radiation dose to the abdomen of a pregnant radiographer be monitored during gestation?

Answer 5

It may be obtained from a second radiation monitor worn at the abdominal level.

Question 6

When a radiologic procedure requires the hands of a radiation worker to be near the primary beam, the equivalent dose to the hands of that individual may be determined through the use of:

Answer 6

A TLD ring worn on the hand of the radiation worker

Question 7

Which of the following instruments is used to calibrate radiographic and fluoroscopic x-ray equipment?

Answer 7

Ionization chamber with electrometer

Question 8

For x-ray and gamma ray photons with energies from 5 keV to greater than 40 MeV, the _______ gives an accurate reading as low as 10 µSv (1 mrem).

Answer 8

OSL dosimeter

Question 9

Which of the following instruments should be used to locate a lost radioactive source or detect low-level radioactive contamination?

Answer 9

GM survey meter

Question 10

Which of the following instruments should be used in an x-ray installation to measure the fluoroscopic scatter radiation exposure rate?

Answer 10

Cutie pie

Question 11

Three different filters are incorporated into the detector packet of the optically stimulated luminescence dosimeter. Of what are these filters made?

Answer 11

Aluminum, tin, and copper

Question 12

What is the maximum period of time that a thermoluminescent dosimeter (TLD) may be worn as a personnel device?

Answer 12

3 months

Question 13

Which of the following instruments is called a cutie pie?

Answer 13

Ionization chamber-type survey meter

Question 14

Which of the following devices contains an aluminum oxide detector?

Answer 14

Optically stimulated luminescence dosimeter