LAT Workbook Unit 2 exam

Which method is NOT a method of sterilization? a) moist heat (steam) b) dry heat c) radiation d) isopropyl alcohol - Answer- d) isopropyl alcohol HEPA filters are only efficient in removing up to ______ of particulate matter. a) 98.9% b) 99.9% c) 100% d) 99.97% - Answer- d) 99.97% How is ammonia gas produced in soiled cage bedding? a) from the gastrointestinal tract b) from bacteria metabolism of urine products c) by bacteria acting on fecal matter d) by spontaneous reaction in conditions of low air flow - Answer- b) from bacteria metabolism of urine products An improper light cycle and excessive noise levels have been documented to have negative effects on ______ in rodents. a) vision b) reproduction c) balance d) hearing - Answer- b) reproduction Which sequence lists documentation procedures from GREATEST to LEAST in effect in eliminating microbes? a) sanitation: sterilization: disinfection b) sterilization: sanitation: disinfection c) disinfection: sanitation: sterilization d) sterilization: disinfection: sanitation - Answer- d) sterilization: disinfection: sanitation Which of the following is a method of monitoring the effectiveness of sanitation and sterilization? a) examining the area under ultraviolet light b) testing for pH stability c) sampling the area using RODAC plates d) checking for HEPA filters - Answer- c) sampling the area using RODAC plates What is a formite? a) a parasite that is commonly found on laboratory mice b) an inanimate object capable of being contaminated with infectious organisms