//Heading displayed on the quiz page pageHeading="Module 1 Self-Test" //Questions qa = new Array() qa[0] = new Question("A properly functioning septic tank is an ________ environment.", "aerobic", "anaerobic", 1) qa[1] = new Question("Biochemical Oxygen Demand ,BOD5 day, is", "a measure of sewage strength.", "a measure of how much carbonaceous material is available as a bacterial food source. ", "a measure of the amount of oxygen consumed by microorganisms as they break down the organic wastes. ", "one factor that affects the leaching field performance. ", "all of the above", 4) qa[2] = new Question("The outlet tee of the septic tank is designed to receive", "effluent from the scum layer of the septic tank.", "effluent from the sludge layer of the septic tank.", "effluent from the clearwater middle layer of the septic tank.", "influent from the house collection system.", 2) qa[3] = new Question("The best way to maximize treatment of sewage in the septic tank is to", "maximize retention time of the sewage.", "provide aeration to the septic tank. ", "add commercial preparations of bacteria, yeast and enzymes.", "provide gas baffles in the tank.", "make sure the septic tank is fitted with inlet and outlet tees.", 0) qa[4] = new Question("The purpose of aggregate in the soil absorption system is to provide surface area for the growth of aerobic bacteria which digest and treat sewage.", "true", "false", 0) qa[5] = new Question("The purpose of the gas baffle is to", "prevent the backup of methane gas into the house.", "prevent gasses generated from the bottom layer of the septic tank from lifting and carrying solids into the outlet tee. ", "prevent sewage odors from entering the house.", "prevent carryover of methane gas into the leaching facility.", 1) qa[6] = new Question("The purpose of the inlet tee in the septic tank is to", "provide uniform mixing in the septic tank.", "Slow the velocity of incoming sewage and prevent disturbance of the scum layer.", "Siphon water out of the clearwater middle layer.", 1) qa[7] = new Question("A distribution box is intended to provide", "pressure dosing to the soil absorption system.", "A holding area where clarified sewage can receive further bacterial treatment.", "Equal distribution of effluent to all portions of the soil absorption system.", "A means by which noxious gasses can exits the septic system.", 2) qa[8] = new Question("All of the following factors are important to the functioning, both treatment and disposal of wastewater, of the soil absorption system. Of these, which is the MOST important to the long term successful functioning of the SAS?", "the BOD load to the SAS", "equal distribution of effluent to all portions of the SAS", "availability of oxygen in the soil surrounding the SAS", "properly sizing the SAS for the sewage flow it will receive", 2) qa[9] = new Question("Choose all that are true. The grease trap", "should be plumbed to receive all wastewater from the facility it serves.", "should be sized to provide at least 24-hour retention time for the wastewater flow.", "Should serve as a sludge collection tank.", "Relies on a short retention time to allow grease to rise and solidify on the water surface.", 1) qa[10] = new Question("Choose all that are not true. The SAS should be vented when", "it is located under impervious material such as asphalt.", "when it is dosed by pump.", "when distribution lines in trenches exceeds 50 feet in length.", "When the SAS is located under more than 3' of cover.", 1) qa[11] = new Question("The distribution box should:", "be installed on a level base.", "Be water tested to ensure that each discharge invert receives equal flow.", "Have all discharge inverts at the same elevation, or use speed levelers.", "Apportion flow evenly to all parts of the SAS", "All of the above.", 4) qa[12] = new Question("Choose all that are true. The biomat", "is a film of biological activity that forms at the leaching facility/soil interface.", "digests and breaks down many of the constituents of wastewater.", "is hostile environment for human enteric pathogens.", "contains protozoa which feed on bacteria including pathogenic bacteria.", "All of the above.", 4) qa[13] = new Question("Which of the following is not true about the SAS", "in order to properly treat and dispose of wastewater, the SAS should remain aerobic.", "in order to properly treat and dispose of wastewater, the SAS should remain anaerobic.", "Primary treatment of wastewater in the SAS occurs in the biomat layer.", "A properly functioning SAS both treats and disposes of wastewater.", 1) qa[14] = new Question("When a pit or gallery is used as an SAS, a maximum of 2 feet of sidewall depth is allowed in the calculation of effective leaching area.", "true", "false", 0) qa[15] = new Question("Which of the following is not true about a bed vs. trench SAS design?", "Distribution lines in trenches are more widely spaced than in beds.", "In a bed design, aggregate underlies the entire bed, but in a trench design the aggregate surrounds only the distribution pipe and native soils fill the remaining area between the distribution pipes.", "According to DEP, bed designs are preferred over trenches.", "In the bed design, only the bottom is used in the calculation of effective leaching area while in the trench design, both the bottom and sidewall areas can be used to calculate the effective leaching area.", 2) qa[16] = new Question("Effective depth of any leaching structure is determined by the depth below the invert of the distribution pipe to the bottom of the aggregate below the system, if there is any.", "true", "false", 0) qa[17] = new Question("For calculation of the effective leaching area of precast structures, the dimensions of the precast unit itself plus the surrounding aggregate is used.", "true", "false", 0) qa[18] = new Question("Choose all that are true. Dosing of effluent to the SAS is used when", "the septic tank effluent can not flow by gravity.", "The design flow of the system exceeds 2000 gallons per day.", "There is a need to load the leaching components of the system more evenly to achieve better treatment.", "The SAS is buried deeper than 36 inches.", "All of the above.", 4) qa[19] = new Question("The dosing chamber should be sized at 200% of the daily design flow and should have an emergency capacity above the working level equal to the design flow of the system.", "true", "false", 0) qa[20] = new Question("When dosing leaching field, the distribution box must be supplied with a vent to allow for pressure release.", "true", "false", 1) qa[21] = new Question("Which of the following is not true. When considering the approval of a tight tank, the Board of Health", "should ensure that the applicant has made every feasible effort to reduce water use.", "Need not consider whether the applicant is proposing new construction, including increases in flow to an existing dwelling.", "Ensure the tank is sized to accommodate 5 times the daily design flow.", "Must forward the application to DEP for approval.", "Must ensure that the tank has a minimum size of 2000 gallons.", 1)