Chapter 02: Radiation: Types, Sources, and Doses Received
1. When natural sources of ionizing radiation become increased because of accidental or
deliberate human actions such as mining, they are referred to as:
a. artificial sources.
b. enhanced natural sources.
c. extraterrestrial sources.
d. manmade sources.
ANS: B REF: 21
2. Electromagnetic radiation can travel through space in the form of a wave but can also interact
with matter as a particle of energy. This dual nature is referred to as:
a. wave attenuation capability.
b. wave-particle interchange ability.
c. wave-particle duality.
d. wave-particle phenomena.
ANS: C REF: 16
3. Which of the following statements concerning the 1979 nuclear reactor accident at TMI-2 is
a. Excess cancer deaths have been predicted to occur in the 2 million people living
within 50 miles of the plant at the time of the accident.
b. Excess cancer deaths have not been predicted to occur in the 2 million people
living within 50 miles of the plant at the time of the accident.
c. The equivalent dose (EqD) received by 2 million people living in the vicinity of
the nuclear reactor at the time of the accident was 0.02 mSv.
d. No melt-through of the reactor vessel occurred during the accident.
ANS: A REF: 28
4. Terrestrial radiation includes which of the following sources?
a. 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
b. Radioactive fallout from nuclear weapons tests in which detonation occurred
c. The sun and other stars
d. Video display terminals and television receivers
ANS: A REF: 21
5. According to the Environmental Protection Agency (EPA), radon levels in homes should not
exceed what level?
a. 200 pCi/L
b. 135 pCi/L
c. 47 pCi/L