Mold QUESTIONS WITH COMPLETE 100% VERIFIED SOLUTIONS 2024/2025, Exams of Biology

Download Mold QUESTIONS WITH COMPLETE 100% VERIFIED SOLUTIONS 2024/2025 and more Exams Biology in PDF only on Docsity! Mold QUESTIONS WITH COMPLETE 100% VERIFIED SOLUTIONS 2024/2025 1. The amount of moisture available on a surface that mold can use to support growth is known as the ________? Water activity Name the 3 primary sewage biohazards. Backeria, Pacasites ,Viruses Name 3 secondary sewage biohazards 1) Endotoxins and exotoxins 2)Fungi 3)Mycotoxins Not all mold spores in the air are ______ but they still may be ______ and ___________. Viable , Toxic,allergenic What are the 4 common sewage viruses? 1) Rotavirus 2)Hepatitus 3)Adenovirus 4)G.I Virus What is the water activity Xerophilic molds prefer? 1)Histoplasna Capsulatum 2)Cryptococcus Define the term Pathogenic? Causes disease in humans What federal agency governs indoor air quality? None What category of water damage can support mold and bacterial growth? All What is the definition of Category 3 water damage and provide 4 examples. water Contaias pathogenic agents and is grossly unsainitary. 1)Seawater 2)Groundwater 3)Backflow from beyond the trap 4)Sewage What are the factors that affect mold growth? 1)Temperature 2)oxygen 3) Ph 4)Nutrients 5)Moisture 6)Lighty What is the nutrient that mold grows best on? Cellulose What is the definition of ERH? What is Te relati ve humidity taten at the Surface If the ERH is determined to be 89% on a surface, what is the water activity? 0.89 What is the water activity that hydrophilic molds prefer? >0.80 <0.90 What is the water activity Xerophilic molds prefer? <0.80 List 2 examples of Xerophilic molds 1) Aspergillus 2)Penicillium What is the average time it takes for Stachybotrys chartarum to grow? 7-12 days What is the common route of entry for mold exposure? Inhalation What is the common route of entry for exposure to Category 3 water? Ingestion What does MVOC stand for? Identify 3 other sources that contribute to odors in buildings other than mold? 1)Re-activated Pet urine 2)Bacteria 3)Off-Gassing from wet What does mVOC stand for? Microbial volatile organic compounds What are MVOCS? They are gaseous waster by-products released by actively in growing fungi and bacteria What are the 4 common viruses found in sewage? 1) E.Coli 2)Pseudomonaa 3)asalmonella 4)Shigella What immunizations are commonly recommended for water damage technicians? Hepa A &B and tetnis A________ Air pressure differential between the work area and the surrounding spce must be created to prevent contaminants from leaving the work zone. Lower/Negative An _____________ should be constructed for entry into and exit from a remediation area. Exit chamber What is the desired pressure to achieve and maintain inside the containment chamber that is being maintained at a lower partial pressure differential. -5 or -0.02 inches of water colum Define Stack Effect Hot air rises and particles , moisture etc, will travel with it What are the risks of using spray adhesive? Extremly flammable and toxix to breath Why should a technician use a fire retardant polyethylene for containment? It will melt ans not burn. Ir will lower the overall fore rating of the buildings What is the slip factor recommended for 6 mil poly and why? Medium (No oil or talic) What is the flame spread rating for the 6mil f/r polyethylene? 25 What is the goal for mold remediation? Achieve mold concetrations that are lower inside containment than outside or unaffected areas woth sumilar mold types present. What is rhe definition of condition 1 contents? Normal, typical spore types and counts What is the definition of Condition 2 Contents? Settled spores usually cleanable What is the definition of Condition 3 Contents? Visable and acrive mold growth - Usually discarded What is the general 6 step sequence that a typical mold remediation will moisture follow? 1)I.D and correct sourcce of mositure 2)Containment 3)Negative air 4)Remove contaminates building material 5)Clean all remaining surfaced 6)Post sampling What are the 3 types of containment? 1) Source 2)Local 3)Full What are the 5 principles of mold remediation states in the S520? 1)Provide for the health and safety of workers and occupants 2)Document conditions and work practices 3)Contamination control 4)Contamination removal 5)Contamination prevention When is source containment used? For small, Controlled areas of contamination (>10 SF as guidance) When is full containment used? For moderate amounts of mold growth (10 SF to 100 SF aw guidance) What are 4 engineering controls that should be used for mold remediation? 1)Contain source before removal 2)Maintain air flow 3)Maintain negative air 4)controlled demolition techniques In a full containment, what should be included to ensure a safe work environment? 1)Fire extinguisher 2)Escape routes and emergency contact info 3)carbon monoxide meter What are 3 ways to evaluate negative pressure? 1)Smoke tubes/pencils 2)visual 3)Manometer What 4 factors determine the maximum pressure that a containment chamber can be placed under? 1)Size of containment chamber 2)Strength of enclosure 3)Make-up air 4)Types of materials usea for constructing the containment Why should the air flow move across the work area? 1)Decrease clean up time 2)Carry contaiminates into the NAM for capture 3)Prevent the PPE from being overloaded What are 4 hazards of negative pressure? 1)Backdraft 2)Bringing the outside air and moisture into the structure 3)collapse 4)Cross containmination What is back drafting? Negative pressure that pulls carbon monoxide or other toxic gasses into the containment chamber What should the remediation contractor provide on every remediation job rather than relying on the homeowner to provide them? Carbon monoxide & Smoke detectors What is the recommended procedure for changing the filters on a HEPA filtration device? One at a time with unit on What is the minimum number of air changes that should be achieved inside of containment? 4ACH What is the definition of a critical barrier? Double 6 mil poly placed over access points that are not meant to be entered or passed through and prevents cross containmination What shluld a technician do if he return to the job site and finds that the negative air pressure has been compromised? Notify the supervisor or consultant and document all actions What is the typical 3 step removal procedure for removing moldy building materials? 1)Contain 2)Remove 3)Discard How do you determine the number of decontamination chambers for a mold remediation project? Project or Protocal specific How should moldy carpet be removed? Cover with 6-mil polythylene and remove under negative pressure Why is misting not a preferred method for dust/spore control when removing moldy building materials? Introduces moisture and disperses spores What are options for cleaning mold from wood materials? Hand sandinf media blasting wire brushing or equivlent