3. Which of the following helps shield the global population from exposure to essentially all high-energy, bombarding cosmic rays?

Atmosphere and magnetic field of the Earth

5.Terrestrial radiation includes which of the following sources?

Long-lived radioactive elements such as uranium-238, radium-226, and thorium-232 that are present in variable quantities in the crust of the Earth

6.Which of the following radiation quantities use the same unit of measure?

Effective dose and equivalent dose

10.What do optically stimulated luminescence dosimeters, thermoluminescent ring dosimeters, and personnel direct ion storage dosimeters have in common?

These devices are all used for personnel monitoring.

14.Which of the following instruments is called a cutie pie?

Ionization chamber-type survey meter

15.Whenever the letter “M” appears under the current monitoring period or in the cumulative columns of a personnel monitoring report, it signifies that a (an)

equivalent dose below the minimum measurable radiation quantity was recorded during that time.

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Week 3 Assignment: S

rad 201

Question	Answer
1. Two cGy equals	.02 Gy.
2. What is the total average annual radiation equivalent dose for estimated levels of radiation exposure for humans?	5.5 mSv
3. Which of the following helps shield the global population from exposure to essentially all high-energy, bombarding cosmic rays?	Atmosphere and magnetic field of the Earth
4.A flight on a typical commercial airliner results in an equivalent dose rate of	0.005 to 0.01 mSv/hr.
5.Terrestrial radiation includes which of the following sources?	Long-lived radioactive elements such as uranium-238, radium-226, and thorium-232 that are present in variable quantities in the crust of the Earth
6.Which of the following radiation quantities use the same unit of measure?	Effective dose and equivalent dose
7.When exposed to high radon levels in the home, which of the following groups of people have the highest risk of developing lung cancer?	Smokers
8.Cosmic radiation occurs in which two forms?	Solar and galactic
9.The x-ray photon energy required to initiate pair production is	1.022 MeV.
10.What do optically stimulated luminescence dosimeters, thermoluminescent ring dosimeters, and personnel direct ion storage dosimeters have in common?	These devices are all used for personnel monitoring.
11.Some of the advantages of the optically stimulated luminescence (OSL) dosimeter are 1. can be used for up to 1 year. 2. lightweight, durable, and easy to carry. 3. integrated, self-contained, preloaded packet	All of the options
Which measurements are included in the annual quality control testing of radiographic and fluoroscopic equipment? X-ray output (Gy or mGy) Fluoroscopy entrance dose rate (mSv/min or R/min) kVp accuracy Exposure time accuracyHalf-value layer (beam quality)	All of the options
13.The effective atomic number (Zeff) of lithium fluoride (LiF) is equal to	8.2.
14.Which of the following instruments is called a cutie pie?	Ionization chamber-type survey meter
15.Whenever the letter “M” appears under the current monitoring period or in the cumulative columns of a personnel monitoring report, it signifies that a (an)	equivalent dose below the minimum measurable radiation quantity was recorded during that time.

Created by: epester

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