Radon Measurement Certification Test Questions and Answers Graded A+

Radon Measurement Certification Test Questions and Answers Graded A+ What is this test? Absolute bullshit filled with trick questions, and cheap verbiage meant to trick and deter takers The four Soil Suction Mitigation techniques Subslab suction, drain-tile suction, sump-hole suction, or block-wall suction What is an Alpha Particle? Two neutrons and two protons bound as a single particle emitted from the nucleus of certain radioactive isotopes in the process of decay. Closed House Procedures During any short-term test, closed-house conditions should be maintained as much as possible while the test is in progress. In tests lasting fewer than four days, closed-house conditions should be maintained for at least twelve hours before starting the test, as well as for the duration of the test. While closed-house conditions are not required before starting tests lasting between four and ninety days, they should be maintained as much as possible. Curie a standard measurement for radioactivity, specifically, the rate of decay for a gram of radium at 37 billion decays per second; a unit of radioactivity equal to 3.7 x 1010 disintegrations per second. Equilibrium Ration At complete equilibrium (i.e., at an equilibrium ratio of 1), 1 WL of RDPs would be present at the radon concentration of 100 pCi/L. The ratio is never 1 in a house; due to ventilation and plate-out, the RDPs never reach equilibrium in a residential environment. A commonly assumed equilibrium ratio is 0.5 (i.e., the decay products are halfway toward equilibrium), in which case 1 WL would correspond to 200 pCi/L. However, equilibrium ratios vary with time and location, and ratios of 0.3 to 0.7 are commonly observed. Picocurie (pCi): one pCi is one-trillionth of a curie, 0.037 disintegrations per second, or 2.22 disintegrations per minute. Picocurie per liter (pCi/L): a unit of radioactivity corresponding to an average of one decay every 27 seconds in a volume of 1 liter, or 0.037 decays per second per liter of air or water. 1 pCi/L = 37 becquerels per cubic meter (Bq/m3). Quality Assurance (QA) a complete program designed to produce results that are valid, scientifically defensible, and of known precision, bias, and accuracy; includes planning, documentation, and quality-control activities. Quality control: the system of activities to ensure a quality product, including measurements made to ensure and monitor data quality; includes: calibrations; duplicate, blank and spiked measurements; inter-laboratory comparisons; and audits. Standard operating procedure (SOP) a written document which details an operation, analysis or action whose mechanisms are prescribed thoroughly and which is commonly accepted as the method for performing certain routine or repetitive tasks. Working level (WL) Any combination of short-lived radon decay products in 1 liter of air that will result in the ultimate emission of 1.3 x 105 MeV of potential alpha energy. This number was chosen because it is approximately the alpha energy released from the decay products in equilibrium with 100 pCi of Rn-222. Exposures are measured in working level months (WLM). sub-membrane depressurization An active radon mitigation system that creates low air pressure under a vapor retarder. A common example is when a vapor retarder (polyethylene plastic sheet) is installed over the exposed dirt floor of a crawlspace. The radon fan draws air from below the vapor retarder and sends it outside. active soil-depressurization system one or more of the following types of radon mitigation system types involving mechanically driven soil depressurization: sub-slab depressurization; sump (pit) depressurization; drain-tile depressurization; sub-membrane depressurization; hollow- block wall depressurization; and crawlspace depressurization.