//Heading displayed on the quiz page pageHeading="Module 2 Self-Test" //Questions qa = new Array() qa[0] = new Question("The single most important factor in septic system design for preventing disease transmission is:", "the horizontal separation distance between the leaching field and a well.", "properly sizing the leaching facility for the expected wastewater flow.", "the vertical separation between the bottom of the leaching facility and groundwater.", "the horizontal separation between the leaching facility and the groundwater.", 2) qa[1] = new Question("Vertical separation refers to", "the distance between the ground surface and the water table.", "the distance between the bottom of the soil absorption system and the groundwater.", "the drop in elevation between the components of the septic system such as the septic tank and the leaching field.", "The distance of the ground you can achieve after getting your electric bill.", 1) qa[2] = new Question("As vertical separation decreases, the potential for pathogen breakthrough to groundwater increases. ", "true", "false", "the two are not related, even by marriage", 0) qa[3] = new Question("Which or the following is NOT true about the biomat surrounding the leaching facility?", "one function of the biomat is to digest sewage", "the biomat functions to slow down the flow of sewage so that unsaturated flow conditions are maintained below the leach field", "it is made up of a diverse community of bacteria, protozoa, and fungi which live on the soil grains", "it is capable of efficient inactivation of viruses.", 3) qa[4] = new Question("As a leaching field decreases in size, loading rate gal/day/sq. ft increases.", "true", "false", 0) qa[5] = new Question("Which of the following is not true about unsaturated flow beneath the leaching field?", "unsaturated flow causes effluent to flow in a thin film over the soil grains.", "Unsaturated flow allows air to fill spaces between the soil grains", "Unsaturated flow minimizes the level of treatment of the sewage.", "Unsaturated flow exposes the effluent to the biologically active sites on the soil surface, which promotes breakdowns of wastes and removal of pathogens.", 2) qa[6] = new Question("The primary site for inactivation of bacteria in sewage effluent is:", "the septic tank", "the leaching chamber", "the biomat surrounding the leaching field", "the saturated soil below the leaching field", 2) qa[7] = new Question("As loading rate gal/sq. ft/day increases, the degree of treatment per foot of soil under the leaching field decreases.", "true", "false", 0) qa[8] = new Question("Which of the following is NOT true about pressure dosing?", "it can compensate for lack of a uniform biomat in seasonally used homes", "it improves aeration of the leaching facility which increases biomat digestion and respiration", "it is appropriate for use only in systems with high strength wastewater", "it provides even dosing of effluent which promotes unsaturated flow beneath the leach field", "it maximizes use of the available treatment surface area", 2) qa[9] = new Question("The primary site for inactivation of viruses in sewage effluent is:", "the septic tank", "the biomat that surrounds the leach field", "the unsaturated soil beneath the leaching field", "the saturated soil beneath the leaching field", 2) qa[10] = new Question("Groundwater exists at a constant elevation, which can be determined at any time by digging a test hole and observing the depth to groundwater.", "true", "false", 1) qa[11] = new Question("Perched water is:", "not an important consideration when deciding at what elevation to locate the leaching facility", "a seasonally high water table such as typically occurs in glacial till soils", "a water table suspended above the regional water table by a confining layer such as clay or silt", "what's in your aquarium after fish have been in it for a while.", 2) qa[12] = new Question("Viruses are trapped and inactivated more efficiently in sand soils than in soils with high clay content.", "true", "false", 1) qa[13] = new Question("Which of the following methods can be used to help achieve unsaturated flow below the leaching facility?", "decrease in the loading rate of the wastewater", "dose the leaching system, either using either pressure or gravity dosing", "increase the vertical separation between the leaching facility and groundwater", "b and c above", "all of above", 4) qa[14] = new Question("As the loading rate gal/sq. ft/day or gal/day/sq. ft increases, the potential for breakthrough of pathogens to groundwater increases.", "true", "false", 0) qa[15] = new Question("Maximum high groundwater elevation can best be determined in sandy soils using historical recorded water level fluctuations in wells located in the same geological conditions and reasonably near by.", "true", "false", 0) qa[16] = new Question("Soil mottling, the presence of yellowish-red and gray blotches in the soil, is an accurate indicator of historic high groundwater levels because.", "mottling indicates the presence of a water table which has fluctuated up and down creating the alternately oxidized and reduced conditions which cause mottling", "mottling is only created when the water table exists at a given elevation for an extended period of time", "it is visible during periods when the observed groundwater levels may be far below the elevation at which mottling is seen", "all of the above", 3) qa[17] = new Question("A septic system needs to be upgraded. Under the local upgrade approval process, the Board of Health alone may approve both a reduction in the leaching field size and a decrease in the vertical separation to the estimated high groundwater.", "true", "false", 1) qa[18] = new Question("A Board of Health has been presented with a variance request for a repair of a septic system to allow a 2.5-foot separation between the bottom of the leaching facility and the estimated high groundwater. Before considering approving the variance, the Board might want to:", "require pressure dosing to achieve more even wastewater loading.", "Determine whether a mounded system is feasible on the lot.", "Determine whether and critical resources such as wells or surface waters are within 250 feet of leaching field.", "a and c only", "a, b, and c.", 4)