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solution 2024
The amount of moisture available on a surface that mold can use to support growth is known as the... - Correct Answers ✅water activity How do molds replicate? - Correct Answers ✅Sporulation What molds produce respirable particles? - Correct Answers ✅Aspergillus, penicillium Respirable - Correct Answers ✅Can be deeply inhaled into lungs; 5 microns 4 common viruses found in sewage - Correct Answers ✅rotavirus, GI virus, adenovirus, hepatitis Name 3 primary sewage biohazards - Correct Answers ✅virus, bacteria, parasites 3 secondary sewage biohazards - Correct Answers ✅endotoxins/exotoxins, mycotoxins, mold 4 common gram negative bacteria found in sewage - Correct Answers ✅e. coli, salmonella, shigella, psuedomonas
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Pathogenic - Correct Answers ✅disease causing MC that can support mold growth - Correct Answers ✅ 16 MC that can support wood decaying fungi - Correct Answers ✅ 20 What federal agency governs indoor air quality? - Correct Answers ✅none What factors affect mold growth? - Correct Answers ✅temperature, light, water, oxygen, pH, nutrients/food source What is the nutrient that mold grows best on? - Correct Answers ✅Cellulose Define ERH - Correct Answers ✅equilibrium relative humidity (moisture at the surface) Example of hydrophilic mold - Correct Answers ✅stachybotrys chartarum Example of mesophilic mold - Correct Answers ✅aspergillus & penicillium
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3 sources for MVOCs - Correct Answers ✅reactivated pet urine, wet building materials, bacteria The presence of MVOCs can be an indicator of: - Correct Answers ✅unacceptable indoor air quality, active microbial growth, incomplete remediation What is a micron? - Correct Answers ✅unit of measurement equal to 1/1,000,000 meters What is the definition of viable? - Correct Answers ✅able to reproduce (germinate) What is the definition of non-viable? - Correct Answers ✅not capable of germination What is the definition of settled spores? - Correct Answers ✅spores landed on surface but not actively growing What is the definition of mycotoxins? - Correct Answers ✅toxigenic compound produced by molds under certain conditions
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Why do molds produce mycotoxins? - Correct Answers ✅defense mechanism What is the carcinogenic mycotoxin produced by aspergillus? - Correct Answers ✅aflotoxin What are the immunizations that water and mold technicians are recommended to have? - Correct Answers ✅hepatitis a&b, tetanus What is the time frame for stachybotrys to colonize? - Correct Answers ✅7-12 days What is the time frame for aspergillus to colonize? - Correct Answers ✅48-72 hours What is the size of most mold spores found in indoor water damaged environments? - Correct Answers ✅2-20 microns What are the molds associated with bird & bat droppings? - Correct Answers ✅histoplasma capsulatum, Cryptococcus neoformans
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What is the ultimate criteria for clearance of a microbial remediation project? - Correct Answers ✅re-occupancy without complaint What are the recommendations/requirements to be an IEP? - Correct Answers ✅education, experience, protocols, etc. What are the recommendations/requirements to interpret sample data? - Correct Answers ✅special training, experience, field observations, etc What are the 3 factors that should be considered when choosing an anti-microbial? - Correct Answers ✅type & extent of contamination, limitations, associated hazards 6 limitations of antimicrobial biocides - Correct Answers ✅concentration, temperature, pH, dwell time, application requirements, material compatability What are 3 types of antimicrobial biocides? - Correct Answers ✅sanitizers, disinfectants, sterilants What product is referred to as a "bound product?" - Correct Answers ✅antimicrobial static agent
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What is the result when applying antimicrobials to organic materials? - Correct Answers ✅anti-microbial is inactivated What are the types of antimicrobial static agents? - Correct Answers ✅biostat, bacteriostat, fungistat How is the efficacy of antimicrobials determined? - Correct Answers ✅testing on previously cleaned surfaces What is FIFRA? - Correct Answers ✅Fifra (FIFRA) is the legislation that sets the registration and labels for chemical disinfectants. Fifra was passed in 1947 and required all pesticides to be registered. What is the concern of mixing bleach with ammonia? - Correct Answers ✅bleach is very reactive & will release toxic gases when mixed with ammonia What is the best preventative for mold contamination? - Correct Answers ✅keeping the structure dry & well maintained
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Bacteriostat - Correct Answers ✅A product that suppresses bacterial growth Ozone - Correct Answers ✅A gaseous phase biocide that is toxic to humans and is not recommended for microbial remediation UV Light - Correct Answers ✅Used inside HVAC ducts, crowded waiting rooms, airlocks and laboratories in an effort to control infectious agents What should the remediator do prior to using any tool or equipment? - Correct Answers ✅Be familiar with instructions & directions for use What is the process the remediator should follow when changing the pre-filters on the AFD? - Correct Answers ✅In a controlled manner (inside containment) while the unit is running How often should the pre-filters be changed on an AFD? - Correct Answers ✅3-4 times daily, 1x daily during cleaning What are the concerns when attaching accessories or ducting to a NAM? - Correct Answers ✅reduction in CFM
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What is the testing procedure that can be used to check the efficiency of the HEPA filter? - Correct Answers ✅Dispersed Oil Particulate What tool can be used to perform the DOP testing? - Correct Answers ✅laser particulate counter What tool can be used to check the CFM of the AFD? - Correct Answers ✅anemometer What should the remediator do when there is a concern of health effects? - Correct Answers ✅document & recommend IEP, recommend occupant consult doctor Define pre-existing damage - Correct Answers ✅prolonged exposure, identified as not part of current loss what is the procedural guideline that the remediator should follow? - Correct Answers ✅S500 & S What is the definition of complexity? - Correct Answers ✅any condition that causes the project to become more difficult/detailed but doesn't prevent work from being done
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Which respirator offers a positive pressure inside the mask via a battery pack? - Correct Answers ✅PAPR PAPR - Correct Answers ✅powered air purifying respirator When are air-supplied respirators required? - Correct Answers ✅insufficient oxygen, extreme temperatures, high concentrations of dust, fumes, mists, gases, vapor When the oxygen exceeds ?% it creates an oxygen-enriched environment - Correct Answers ✅23. What must the worker do each time they don their respirator? - Correct Answers ✅conduct a positive and negative seal check What are the maintenance steps that must be done to a half or full-face respirator? - Correct Answers ✅clean, store properly, dry, inspect What does the P100 of the respirator cartridge remove? - Correct Answers ✅99.97% of particulates to 0.3 microns What does the organic vapor cartridge remove? - Correct Answers ✅MVOCs and chemical odors
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P1 disposable suits hold out ____% of dry particulate whereas a P2/P holds out ___% of dry particulate. - Correct Answers ✅90, 100 What is the last piece of PE that should be removed & why? - Correct Answers ✅respirator, reduce potential inhalation exposure What is the order to remove (doff) PPE? - Correct Answers ✅protective suit, gloves, respirator What does OSHA require for a respirator program? - Correct Answers ✅medical eval, fit test, documented training, selection of respirators How should respirator cartridges be stored and why? - Correct Answers ✅clean & dry, seal with 3" tape, store in air tight bag; to prevent breakdown What is a risk to the technicians by wearing P3 disposable coveralls? - Correct Answers ✅overheating What does OSHA General Duty Clause state? - Correct Answers ✅employers must provide a work place free from hazards that could result in injury, illness, or death
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Why should a technician use a fire retardant polyethylene for containment? - Correct Answers ✅will not raise the fire load What is the slip factor recommended for 6 mil poly and why? - Correct Answers ✅medium - no oil or talc What is the goal for mold remediation? - Correct Answers ✅return to Condition 1 Condition 1 - Correct Answers ✅normal/acceptable Condition 2 - Correct Answers ✅contaminated with settled spores Condition 3 - Correct Answers ✅visible contamination What are the 3 types of containment? - Correct Answers ✅source, local, full What are the 5 principles of mold remediation stated in the S520? - Correct Answers ✅1) Provide for health and safety of workers and occupants 2) document conditions and work processes 3) control the contaminant at the source 4) physically remove the contamination 5) correct the moisture problem to prevent recontamination
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When is source containment used - Correct Answers ✅small amounts When is local containment used - Correct Answers ✅moderate amounts When is full containment used? - Correct Answers ✅significant amounts How is the number of decon/exit chambers for a mold remediation project determined? - Correct Answers ✅job & site specific What are 3 ways to evaluate negative pressure? - Correct Answers ✅visual, smoke tube, manometer What are the factors determining the maximum pressure that a containment chamber can be placed under? - Correct Answers ✅1) size 2) strength 3) integrity 4) 5) What should the remediation contractor provide on every remediation job rather than relying on the homeowner to provide them? - Correct Answers ✅carbon monoxide detector
