Steam Sterilization Principles and Practices, Exams of Preventive medicine

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IAHCSMM Sterilization and disinfection

CST Exam Review Questions and

Answers 100% Pass | Graded A+

David Mungai [Date] [Course title]

IAHCSMM Sterilization and

disinfection CST Exam Review

Questions and Answers 100% Pass |

Graded A+

The amount of pressure necessary in a steam sterilizer set at 250 F is: A- 15-17 lb B- 20-22 lb C- 22-25 lb D- 25-27 lb - Answer>> A- 15-17 lb Positive assurance that sterilization conditions have been achieved can only be obtained through: A- biological control test B- beat-sensitive tape C- color change monitor D- mechanical indicator - Answer>> A- biological control test A wrapped tray of instruments is sterilized in a gravity displacement sterilizer at 250 F for: A- 10 minutes B- 15 minutes C- 30 minutes D- 40 minutes - Answer>> C- 30 minutes The minimum exposure time for unwrapped instruments in a flash sterilizer that is set at 270F (132 C) is: A- 2 minutes B- 3 minutes C- 5 minutes D- 7 minutes - Answer>> B- 3 minutes

D- solutions may be autoclaved along with other items as long as they are on the shelf alone - Answer>> D- solutions may be autoclaved along with other items as long as they are on the shelf alone Wrapped basin sets may be sterilized by steam under pressure at 250F for a minimum of: A- 5 minutes B- 10 minutes C- 15 minutes D- 20 minutes - Answer>> D- 20 minutes Which of the following statements regarding the sterilization of basin sets is TRUE?: A- basins must be separated by a porous material if they are nested B- sponges and linen may be packaged inside the basin to be sterilized C- basins are placed flat in the autoclave D- basins must always be placed on the top shelf of the autoclave in the combine load - Answer>> A- basins must be separated by a porous material if they are nested All of the following statements regarding instruments sets are true EXCEPT: A- instruments must be placed in perforated trays B- heavy instruments are placed on the bottom C- all instruments must be closed D- all detachable parts must be disassembled - Answer>> C- all instruments must be closed Which of the following statements regarding the sterilization of basin sets is TRUE: A- basins must be separated by a porous material if they are nested

B- sponges and linen may be packaged inside the basin to be sterilized C- basins are placed flat in the autoclave D- basins must always be placed on the top shelf of the autoclave in the combine load - Answer>> A- basins must be separated by a porous material if they are nested Why would gas sterilization be chosen over steam sterilization? A- it is less expensive B- it is less damaging to items C- it is faster D- it is more effective - Answer>> B- it is less damaging to items The chemical agent used in gas sterilization is: A- ethylene glycol B- ethacrynate sodium C- Ethyl chloride D- ethylene oxide - Answer>> D- ethylene oxide What chemical system uses peracetic acid as the sterilant? A- ozone gas sterilization B- steris C- sterrad D- vapor phase sterilization - Answer>> B- Sterris The lumen of a tubing undergoing ethylene oxide (EO) sterilization is: A- well lubricated B- dried thoroughly C- prepared with a residual of distilled water D- prepared with NaCl flush - Answer>> B- dried thoroughly The commercial name for glutaraldehyde is: A- peracetic acid

In a high-speed flash sterilizer, unwrapped instruments are exposed for a minimum of: A- 1 minute B- 3 minutes C- 5 minutes D- 10 minutes - Answer>> B- 3 minutes To kill spores, an item must be immersed in a 2% acquiers solution of glutaraldehyde for: A- 20 minutes B- 2 hours C- 10 hours D- 24 hours - Answer>> C- 10 hours When placing tubing in an activated glutaraldehyde solution, one should: A- use a shallow container B- be certain that the interior of the tubing is completely filled C- moisten it thoroughly before submersion D- both B and C - Answer>> B- be certain that the interior of the tubing is completely filled What is the role of moisture in EO sterilization? A- the items will dry out during the process if no humidity is added B- the sterilizer will deteriorate from gas over a period of time if no moisture is added C- dried spores are resistant to the gas, so they must be hydrated D- moisture is not an essential element in gas sterilization - Answer>> C- dried spores are resistant to the gas, so they must be hydrated "Slow exhaust" in a gravity displacement steam sterilizer is used for: A- plastics B- solutions

C- rubber D- drape packs - Answer>> B- solutions What is the function of an aerator in EO sterilization? A- it is used to aerate items before sterilization B- it is a separate unit used to decrease the aeration unit C- it is the last cycle in the EO sterilizer, which helps exhaust the gas and add air D- it adds air to the cycle, which is essential for obtaining item sterility - Answer>> B- it is a separate unit used to decrease the aeration unit Ethylene oxide destroys cells by: A- interfering with the normal metabolism of the protein and reproductive processes B- coagulating cell protein C- converting ions to thermal and chemical energy causing cell death D- shrinking the cell - Answer>> A- interfering with the normal metabolism of the protein and reproductive processes Activated glutaraldehyde is used to disinfect endoscopes for: A- 5 minutes B- 10 minutes C- 20 minutes D- 60 minutes - Answer>> C- 20 minutes When using a high-level disinfectant, always: A- submerge items while wet B- rinse items with sterile distilled water before using C- soak items in saline before using D- add hot diluent to activated agent - Answer>> B- rinse items with sterile distilled water before using The chemical sterilant used in the steris method of sterilizing is:

A- evidence-based practice B- the Spaulding method C- reprocessing D- central monitoring - Answer>> B- the Spaulding method According to the Spaulding system, what risk is assigned to sterile body tissue including the vascular system: A- critics B- semi critical C- non critical D- intermediary critical - Answer>> A- critical What method of sterilization is used on objects that cannot tolerate heat, moisture, and the presence of steam sterilization? A- gravity displacement B- ETO C- hydrogen peroxide D- cidex - Answer>> B- ETO Glutaraldehyde is a high-level disinfectant, that is, a sporadically, a bacteriocidal, and a virocid at a 2% concentration for ————, it is Aldo tuberculocidal : A- 10 minutes B- 15 minutes C- 20 minutes D- 40 minutes - Answer>> C- 20 minutes Chemical monitors are placed inside and outside of all packs to be sterilized. This monitor shows: A- the item is sterile B- proper packaging is achieved C- the parameters such as heat and pressure have been reached D- the proper time as been met - Answer>> C- the parameters such as heat and pressure have been reached

To achieve 270degrees F, the required pressure is: A- 15 psi B- 20 psi C- 27 psi D- 40 psi - Answer>> C- 27 psi why is ethylene oxide diluted with an inert gas?: A- it increases its effective sterilization B- it adds convenience and speed C- it adds humidity D- it helps with aeration - Answer>> A- it increases its effective sterilization Bioburden refers to: A- the degree of microbial contamination B- a hospital acquired information C- a chemical agent D- high level disinfectant - Answer>> A1 the degree of microbial contamination Sterility was previously measured by time but is now considered invalid. The principle now used is: A- carefully checking sterile indicators B- event-related sterility C- terminal sterility D- both B and C - Answer>> D- both B and C The following statement regarding wrapping material are true EXCEPT: A- disposable nonwoven wrappers are intended for one use only B- you can use two 140 thread count per square inch C- you can use one 280 thread count per square inch D- peel pouches can be used on all instruments including large heavy instruments and micro instruments - Answer>> D- peel

Which is not a method of sterilization but is a heating process that destroys microorganisms at a temperature and exposure time but does not alter their chemical makeup: A- decontamination B- pasteurization C- hydrogen peroxide plasma sterilization D- ETO gas sterilization - Answer>> B- pasteurization What is the immunity referred to when you are exposed to the disease and as a result you become immune: A- naturally acquired active immunity B- artificially acquired active immunity C- artificially acquired passive immunity D- naturally acquired passive immunity - Answer>> A- naturally acquired active immunity An obligatory parasite is: A- a type of prion B- a type of microorganisms that depends on living tissue to survive C- a type of microorganism that depends on dead tissue to survive facultative parasite D- all of the above - Answer>> B- a type of microorganisms that depends on living tissue to survive The only antibiotic that works on MRSA is: A- gentamicin B- amoxicillin C- tobramycin D- vancomycin - Answer>> D- vancomycin All are true regarding a prion EXCEPT: A- Creutzfeldt-Jakob disease B- they contain DNA/RNA C- it is neither viral, bacterial, nor fungal

D- when performing surgery on a patient that is infected with a prion, we should use disposable instruments - Answer>> B- they contain DNA: RNA ——— is when different organisms exist and benefit for the other. ——— is when one organism benefits form the other and neither is harmed. ——— is when one organism benefits form the other and harms the host: A- parasitism, mutualism, commensalism B- commensalism, mutualism, parasitism C- mutualism, commensalism, parasitism D- parasitism, commensalism, mutualism - Answer>> C- mutualism, commensalism, parasitism Bioterrorist agents include all EXCEPT: A- anthrax B- botulism C- small pox D- bubonic plague - Answer>> D- bubonic plague New infectious diseases emerging in the US include: A- SARS B- West Nile virus C- avian influenza D- all of the above - Answer>> D- all of the above The chemical name for common household bleach is: A- sodium hypochlorite B- quaternary ammonium compounds C- petroleum products D- hydrogen peroxide - Answer>> A- sodium hypochlorite What is the test that is used to check for air trapped in the prevaccum sterilizer?: A- biological indicator

A- increase anti microbial effect B- reduce flammability of ETO C- reduce temperature requirement D- increase microbial killing rate - Answer>> B- reduce flammability of ETO How long should the ETO biological indicator be incubated before the reading is recorded? A- 24 hours B- 48 hours C- 12 hours D- 3 hours - Answer>> B- 48 hours For ETO sterilization, how long must instruments remain in the aerator being operated at 140 degree F? A- 8 hours B- 6 hours C- 4 hours D- 2 hours - Answer>> A- 8 hours What spores is used to test steam under pressure (steam sterilizer)? A- clostridium perfringens B- bacillus stearothermophilus C- treponema pallidum D- staphylococcus aureus - Answer>> B- bacillus stearothermophilus