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RADON CHAPTER 2 – QUESTIONS AND ANSWERS
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RADON CHAPTER 2 – QUESTIONS AND ANSWERS
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RADON CHAPTER 2 – QUESTIONS AND ANSWERSA significant difference between one room and the next in a building with a large central
air handling system is often caused by: - Answers -An unbalanced air distribution
system
A correct statement regarding radon testing in Zone 3 areas of the EPA Radon Potential
Map is that such testing: - Answers -a. is recommended. (correct)
b. is not recommended.
c. will invariably reveal radon levels below 4 pCi/L.
d. will reveal radon levels below 2 pCi/L
After 25 years of updates by testers and state agencies, the US EPA Map of Radon
Zones is a good predictor of where indoor radon levels will not be elevated. - Answers -
False
How can you tell if a house contains elevated levels of radon? - Answers -Test for
radon.
If a short-term, closed building radon test is conducted in the basement of a home with
a result of 10 pCi/L, what can be said about the radon levels on the first floor above the
basement? - Answers -The first floor radon level is likely to be equal to or less than the
basement measurement of 10
If the water for a home comes from an underground well that has 60,000 pCi/L in the
water, how much radon will be added to the air of the home due to normal usage of
water? - Answers -6 to 10 pCi/L
In a cold climate, stack effect is typically higher during the: - Answers -Winter
In a house with a forced air heating and cooling system, which of the following
conditions would most likely increase short-term indoor radon concentrations the most?
- Answers -Return ducts are on the suction side of a furnace blower. Hence, there is a
high vacuum inside the return ducts. If the return duct is buried in radon producing soil
and it has leaks in it, when the furnace fan operates it will draw radon out of the soil and
dump it into the living space.
The correct answer is: Return ducts under the slab with the air blower on.
In most homes the main source of elevated radon levels is: - Answers -the soil
Indoor Radon levels are always higher during the winter months (November through
March) than any other time of year. - Answers -Indoor radon levels are affected by
many things, one of which is climate. However climates are different in different parts of
the country. The building's heating or cooling systems can also have a dramatic impact
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