NRPP Radon Measurements Exam Study Guide Questions and Answers Graded A 2024

NRPP Radon Measurements Exam Study Guide Questions and Answers Graded A 2024 If a sample of radon is taken from a room that is known to be at 125pCi/L and is kept in a well sealed container, what will the approximate radon activity be within the container after eight days? - 31.3 Radon decay products have (or )longer shorter half lives than radon gas? - Shorter The ionization of an otherwise electrically neutral atom is used in measuring radiation. Which process best describes ionization? - An uncharged atom gains or loses orbital electrons ()and becomes electrically charged. Give three characteristics of radon - Half life of 3.8 days Inert Can't sense (see, smell, or taste) Radioactive Naturally occurring Gas If a room within a home is determined to be at 25 pCi/L, what working level would be expected in this room using typical assumptions for equilibrium ratio in residential buildings? - 0.13 What is the highest working level that could be observed in a room having a constant radon activity of 10 pCi/L ? - 0.1 f a radon measurement is calculated to be 7.8456 pCi/L, what number should be written on the report to the client? - 7.8 pCi/L A building has very high internal air circulation rate and was measured at 0.03WL. What can be said about the radon concentrations? - The radon is probably more than 6 pCi/L. What is the approximate outdoor radon concentration? - 0.4 pCi/L Within the U.S, the EPA believes the average annual indoor radon activity to be: - 1.3 pCi/L What would be the expected working levels in a room at 4 pCi/L, using typical assumptions for equilibrium ratio in residential buildings? - 0.02 WL In order to calculate the equilibrium ratio in a home you need to know: - Results of simultaneous measurements of radon and radon decay products. Lung cancer risks exist with exposures to radon concentrations below 4pCi/L. - True Short -term measurements can be factored by the time of deployment to determine a year-long average. - False The results of a short -term, closed building test indicates the highest the radon could ever be. - False Radon is only a concern in homes, not in schools and workplaces. - False When emitted within the lungs, which one of the three ionizing radiation types causes the most cell damage within the lung? - alpha particle The health risk of radon has most strongly been determined by what studies? - Occupational exposures and lung cancer incidence in underground miners Miner Studies According to the most recent version of U.S. EPA's Home Buyer's and Seller's Guide, what is the estimated number of cancer deaths that occur annually in the United States from radon exposure in homes? - 15,000 - 22,000 Referring to the most recent health risk chart from the U.S. EPA's Citizen's Guide, who would have the greater lifetime risk of contracting radon induced lung cancer? A smoker in a home at 4 pCi/L A former smoker at 10 pCi/L | A never smoker at 20 pCi/L A never smoker at100 pCi/L - A never -smoker at 100 pCi/L. According to EPA's linear, no threshold health risk model, which set of circumstances would present the highest health risk from radon?(Assume all things equal such as climate, occupancy, etc.) Living in a home at: 100 pCi/L for 1 year 30 pCi/L for 8 years 10 pCi/l for 15years 5 pCi/L for 8 years - 38 0 pCi/L for years The greatest health risk from radon generally comes from: - Alpha particles released from radon decay products attached to lung tissue. More lung cancers are caused by radon than any other cancer causing agent. - False Highly energetic gamma, released when radon decays, causes lung cancer. - False Exposure to radon for long periods of time increases the risk of lung cancer. - True What weather conditions cause the greatest spikes in indoor radon concentrations during a two day test? - High winds and/or heavy rain fall