Radon Certification Test - Citizen's Guide to Radon Test Questions Latest Update Graded A+

Radon Certification Test - Citizen's Guide to Radon Test Questions Latest Update Graded A+ What is the half life for Radon 3.8 days According to the EPA, a short term measurement is recommended because they are considered: To deliver results more quickly than long term measurements A short term testing period is: Anything less than 90 days What is the minimum distance between the detector and doors or windows? 3 ft What is the minimum distance above the floor at which a non-hanging detector can be placed? 20 in. What is the minimum distance above the floor which a hanging detector should be? 6 - 8 ft What is the minimum distance between a detector and any other object? 3 in. What is the purpose of "Closed Building Conditions"? To make the measurement reproducible "Closed Building Conditions" are used only for what kind of tests? Short-term ( 2 to 90 days) In "closed building conditions", required 12 hours prior to the measurement... ...if the test is 2 - 4 days In "closed building conditions", recommended 12 hours prior to the measurement..... ...if the test is 4 - 7 days In "closed building conditions", not required or recommended, if the test is..... ...if the test is lasting longer than 90 days In cases where "closed building conditions" must be viewed more rigorously, include: Cases where "closed building conditions" are not the normal living conditions What measurement period should unusually severe weather to be considered to preclude (hinder) the measurement? 2 - 3 day test Indoor air concentrations of radon are how many times higher than outdoor concentrations? 3 times higher The long term goal of the U.S. Congress regarding radon concentration in homes: The concentration should be lowered to no more than the outside levels What is RPD? Relative percent difference How do you calculate RPD? 1. Calculate the difference of the two readings 2. Calculate the average of the two readings 3. Difference divided by the Average What is the minimum measurement period when using an active monitor to produce results in which mitigation decisions may be made? 48 hours If a continuous monitor cannot record hourly values, then it must..... ....be used with a passive monitor Before the test begins.... 12 hours prior to the measurement, use "closed house conditions" During the test.... Maintain "closed building conditions" if it is a short term test What is the primary method of interference