Radon Mitigation Topic 2 Questions And Answers With Complete Solutions

Radon Mitigation Topic 2 fx fx fx




1. In conducting a sub- fx fx fx




slab communication test prior to the design of a sub-
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slab depressurization (SSD) system, which one of the following proce-
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dures is most appropriate? fx fx fx




Select one: fx




A. The vacuum- fx




cleaner suction hole and the test holes should always be placed on the p
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erimeter of the slab. fx fx fx




B. Drill the vacuum- fx fx




cleaner suction hole near the expected location of the suction pipe; drill o
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ne test hole as far away as possible.
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C. Drill the vacuum- fx fx




cleaner suction hole near the expected location of the suction pipe; drill pres
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sure-
measurement test holes on opposite sides of things like grade beams that co fx fx fx fx fx fx fx fx fx fx fx fx




uld block air movement, as well as the furthest side of the slab.
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D. Place the vacuum- f x f x




cleaner suction hole in the center of the slab; placement of the test holes is not i
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mportant.: C. Drill the vacuum- fx fx fx fx




cleaner suction hole near the expected location of the suction pipe; drill pressure-
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measurement test holes on opposite sides of things like grade beams that could block air movement, as well as the f
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urthest side of the slab.fx fx fx fx




2. When operating, what typically causes the least vacuum in a house?
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Select one:
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A. Downdraft range exhaust fx fx




B. Evaporative cooler (swamp cooler) fx fx fx




C. Oil-fired boiler with combustion air fx fx fx fx




D. Bathroom exhaust fan: B. Evaporative cooler (swamp cooler) fx fx fx fx fx fx fx




3. Radon levels in houses can be lowered significantly by opening windows an
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d doors. After the doors and windows are closed again, approximately how lon
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, Radon Mitigation Topic 2
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g will it take for radon levels to rise to their closed-house values?
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Select one: fx




A. A few minutes
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B. A few hours
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, Radon Mitigation Topic 2 fx fx fx




C. A few days fx fx




D. A week: B. A few hours
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4. A sub- fx




slab pressure differential measurement is made in a basement, using a micro
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manometer. A tube from the high- fx fx fx fx fx




side port of the gauge is inserted beneath the slab and sealed. The low-
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side port is open into the room. The gauge indicates -
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0.011 inches of water (WC). Which one of the following statements most appr
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opriately reflects the significance of this reading? Select one:
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A. The sub-slab is positively pressurized with respect to the house.
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B. The house is positively pressurized with respect to the under-slab.
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C. An accurate assessment cannot be made, since the tube is connected to the
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wrong port. fx




D. The sub- f x




slab is positively pressurized with respect to the outside atmos-
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phere.: B. The house is positively pressurized with respect to the under-slab.
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5. Flux measurements are used to measure the:
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Select one: fx




A. Rate at which radon is being emitted per unit area of material.
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B. Concentrations of radon decay progeny. fx fx fx fx




C. Voltage differentials associated with radon decay on the surface of the
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material.
D. Ventilation rate of the material.: A. Rate at which radon is being emitted per unit area of material.
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6. During vacuum cleaner diagnostics to simulate active soil (ASD) system pe
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rformance, the following data are obtained: Velocity of air: 2100 fpm; Inside dia
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meter of pipe where measurement is taken: 1.5 inches. What is the airflow rat
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e in cfm? [(*pi = 3.14]
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Select one: fx




A. 0.3
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