Radiation Safety final

If ionizing radiation from natrual sources grows larger because of accidental or deliberate human actions such as mining radioactive elements, the sources are termed

Enhanced natural sources

Electromagnetic radiation travels or propagates through space in the form of a wave but can interact with matter as a particle of energy called a photon. This dual nature is referred to as

Wave-particle duality

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

The enviromental protection agency (EPA) recommends that action be taken to reduce elevated levels of radon in homes to a concentration less than

4 pCi/L

Cosmic radiation occurs in which two forms

Solar and Galactic

As a result of technologic advances since the 1970’s and strict regulations imposed within the united states by the FDA regarding consumer products containing radioactive materail, the radiation exposure of the general public from such produces ay now be considered

Negligible

Through which of the following routes can radon enter houses?

1. crawl spaces under living area

2. Floor drains and sump pumps

Porous cement block foundation

1, 2, and 3

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

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

Which of the following is considered by the EPA to be the second leading cause of lung cancer in the US?

Radon exposure

Who was the first American Radiation worker to die from a radiation-induced cancer in October of 1904

Claerence Madison Daily

0.2 Gy equals

200 mGy

The total kinetic energy released in a unit mass (kilogram) of air and expressed in metric units of joules per kilgram is

air kerma

Which of the following is essentially the sum of total air kerma over the exposed area of the patients body surface?

Dose area product