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A collection of 300 real exam questions and answers for the crcst (certified registered central service technician) exam. It covers a wide range of topics related to sterilization, disinfection, and infection control in healthcare settings. The questions are designed to test the knowledge and understanding of essential concepts and procedures in central service departments.
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After the Bowie Dick's test cycle completes, the color of the test sheet is found to be patchy. What action should be taken? A. The sterilization time should be increased and the test rerun per manufacturer's IFU B. CST should go ahead and load the sterilizer for sterilization to begin. C. Sterilizer must be taken out of service until the issue is identified and fixed. - ANSWER >>>>C. Sterilizer must be taken out of service until the issue is identified and fixed. The spore producing microorganism used in steam sterilizer testing is A. Geobacillus Stearothermophilus B. Bacillus Subtillus C. Bacillus Atrophaeus - ANSWER >>>>A. Geobacillus Stearothermophilus Which of the following is used to reduce the amount of chloride in water that will otherwise inhibit the effectiveness of deionization and reverse osmosis systems?
A. Descalers B. Granular Activated Charcoal C. Enzymatic detergent D. Chelating Agents - ANSWER >>>>B. Granular Activated Charcoal Wha tis the packaging of choice for dry heat sterilization? A. Aluminum Foil B. Nonwoven wrap C. Paper-plastic - ANSWER >>>>A. Aluminum Foil All of the following PPE are required by OSHA for techs in Decon except A. Utility Gloves B. Face Protection C. Shoe Covers D. Scrub Attire - ANSWER >>>>D. Scrub Attire Which of the orgs work to prevent HAI. (Hospital Associated Infection) A. ANSI B. NFPA C. APIC D. USP-NF - ANSWER >>>>C. APIC Which of the following agencies develops recommended standards, practices and guidelines for care and processing of devices? A. DOT B. FDA C. SGNA
A. Making an opening onto the skull bone access the brain. B. Straightening or removal of bone from the nose. C. Relocating a non-descended testicle to the correct location in the scrotum. - ANSWER >>>>C. Relocating a non-descended testicle to the correct location in the scrotum. Sterile packs should be stored ______ away from the exterior walls and windows in the storage area A. 8" B. 1" C. 2" - ANSWER >>>>C. 2" After sterilization, the wrapped package must cool to
A. Body temperature B. Room temperature C. Temperatures below 50 degrees F. - ANSWER >>>>B. Room temperature Every load that contains implantable device must be monitored with A. A minimum physical monitors B. Process Challenge Device (PCD) C. At a minimum a Chemical Indicator (CI) - ANSWER >>>>B. Process Challenge Device (PCD) The following agencies recognize that sterility is event related A. The Joint Commission and AORN
B. AAMI and OSHA C. AORN and OSHA - ANSWER >>>>A. The Joint Commission and AORN The relative humidity in the sterile storage area should be A. Less than 80% B. Less than 70% D. Between 30% and 75% - ANSWER >>>>B. Less than 70% What action should be taken if a failed BI is obtained after the release of processed medical devices? A. All medical devices processed in that sterilizer since the last negative biological indicator was obtained must be recalled. B. The medical devices must be recalled and reprocessed immediately. C. The medical devices can only be used after the event is reported and documented. - ANSWER >>>>A. All medical devices processed in that sterilizer since the last negative biological indicator was obtained must be recalled. Which microorganism is used in the Biological indicator for monitoring Ethylene Oxide (EtO)? A. Bacillus Atrophaeus B. Bacillus Subtilis C. Staphylococcus aureus - ANSWER >>>>A. Bacillus Atrophaeus Spunbond-Meltdown-Spunbond packaging material should be used in which of the following?
A. Implants can never be used B. Implants should be quarantined C. Implants can be used in a emergency without documentation. - ANSWER >>>>B. Implants should be quarantined All of the following can cause chemical test failure except A. Not following the medical device's IFU B. Sterilizer malfunction C. Not placing the chemical indicator in the center of the package.
A. Cavitation B. Impingement C. Aeration - ANSWER >>>>A. Cavitation Which of the following about ergonomic injuries is true? A. Ergonomic injuries do not happen in health care facilities. B. Ergonomic injuries can be minimized by not working too fast. C. Are risk factors for persons who perform repetitive or physical work. - ANSWER >>>>C. Are risk factors for persons who perform repetitive or physical work. The pH of purified water is A. 4.5-5. B. 5.5-6. C. 6.5-7.5 - ANSWER >>>>C. 6.5-7. Until cleaning can begin it is important to A. Discard all disposable items B. Keep instruments moist C. Lubricate the instruments - ANSWER >>>>B. Keep instruments moist Which of the following sterilization methods eliminates the need to purchase a sterilant? A. Hydrogen Peroxide B. Ozone C. Ethylene oxide - ANSWER >>>>B. Ozone Which of the following agencies establishes standards and guidelines for processing of flexible endoscopes?
A. Chalky white stain B. Hard brown rust C. A bluish stain - ANSWER >>>>A. Chalky white stain What type of fire extinguisher is used to extinguish fires that involve flammable and combustible liquids such as gasoline alcohol? A. Class A B. Class B C. Class C - ANSWER >>>>B. Class B The weakest link in the chain of infection is the A. Susceptible host B. Method of transmission C. Reservoir - ANSWER >>>>B. Method of transmission Heart valves and pacemakers are examples of FDA _________ medical devices A. Class 1 B. Class 2 C. Class 3 - ANSWER >>>>C. Class 3 Which of the following is the correct way for placing plastic/paper pouches on a sterilizer cart? A. Pouches should be placed on their edge B. Pouches should be placed flat on the paper side C. Pouches should be placed flat on the plastic side - ANSWER
A. Pouches should be placed on their edge
How should instrument sets in rigid containers be placed on the sterilizer cart? A. Placed vertically on the shorter side B. Tilted C. Placed flat - ANSWER >>>>C. Placed flat When CS technicians receive prepackaged sterile items from outside the facility, they should check A. For expiration date B. For the safety items C. For name of the manufacturer - ANSWER >>>>A. For expiration date Where should a BI PCD be placed in the sterilizer chamber? A. Next to the drain B. Inside the instrument pack C. According to the sterilizer manufacture written recommendation - ANSWER >>>>C. According to the sterilizer manufacture written recommendation The inventory system that stocks supplies by established stock levels is A. Requisition system B. Exchange system C. Par-level - ANSWER >>>>C. Par-level Impregnated gauze strips may be sterilized using A. Steam sterilization B. Ethylene oxide sterilization C. Dry heat sterilization - ANSWER >>>>C. Dry heat sterilization
maintenance of the sterilizer should be contacted to perform further investigations. Sterilizer _____________ is performed to verify that the sterilizer is in good working condition at the user's facility and performs according to the manufacturer's specification. A. Qualification Testing B. Mechanical Testing C. Functional Testing - ANSWER >>>>A. Qualification Testing What microorganisms is used in BI/PCD testing for EtO? A. Bacillus subtillus B. Bacillus atrophaeus C. Staphylococcus aureus - ANSWER >>>>B. Bacillus atrophaeus Which of the following processes is capable of removing large percentage of dissolved solids through a semi-permeable membrane? A. Distillation B. Reverse Osmosis C. Deionization - ANSWER >>>>B. Reverse Osmosis Enzymatic detergents generally work best with water at temperatures A. Between (100 degrees F - 140 degrees F) B. Between (150 degrees F - 160 degrees F) C. Above 160 degrees F - ANSWER >>>>A. Between ( degrees F - 140 degrees F) Geobazillus stearothermophilus is used for ____________ test
A. Biological B. Chemical C. Diagnostic - ANSWER >>>>A. Biological The bottom shelves of the storage unit for sterile packages must be ____________ from the floor A. 2-4 inches B. 5-7 inches C. 8-10 inches - ANSWER >>>>C. 8-10 inches Sponges should A. Be discarded after each use B. Be cleaned and sterilized for re-use C. Never be used to clean medical devices. - ANSWER >>>>A. Be discarded after each use Sharps must be removed from instrument tray A. With tongs B. With hands wrapped in paper C. Wearing latex gloves - ANSWER >>>>A. With tongs Horizontal work surfaces in the decontamination area should be cleaned and disinfected ____________ A. Once a day B. At the beginning and end of each shift C. Once a week - ANSWER >>>>B. At the beginning and end of each shift Which of the following sterilization methods is compatible with Spunbond polyolefin/plastic pouch?
B. Items in the sterilizer to remain dry and microorganisms cannot be killed readily. C. Wrapped items in the sterilizer to remain hot much longer and microorganisms killed quicker. - ANSWER >>>>B. Items in the sterilizer to remain dry and microorganisms cannot be killed readily. Which of the following equipment will be needed for administering IV therapy fluids A. Suction pump B. Infusion pump C. Sequential Compression Device - ANSWER >>>>B. Infusion pump What is the preferred rate at which the BI Process Challenge Device (PCD) should be used for routine sterilizer efficacy monitoring? A. Once a week B. Twice a week C. Every day the sterilizer is used - ANSWER >>>>C. Every day the sterilizer is used Which of the following will require Bowie Dick test to be run? A. Ultrasonic cleaners B. Dynamic-air-removal steam sterilizers C. Ethylene oxide sterilizers - ANSWER >>>>B. Dynamic-air- removal steam sterilizers Which of the following is an automated equipment designed to clean, disinfect, and rinse endoscopes?
Which agency requires that healthcare facilities develop and implement procedures to ensure that they meet minimum safety standards A. FDA B. CDC C. TJC - ANSWER >>>>C. TJC The FDA classifies sterilization packaging as a A. Class I Medical Device B. Class II Medical Device C. Class III Medical Device - ANSWER >>>>C. Class III Medical Device The spore used in the testing of steam sterilization is: A. Pseudomonas aeruginosa B. Geobacillus Stearothermophiles C. Bacillus Atropaheus - ANSWER >>>>B. Geobacillus Stearothermophiles To achieve a reasonable level of disinfection alcohol requires wet contact for at least A. 5 minutes B. 10 minutes C. 15 minutes - ANSWER >>>>A. 5 minutes The unit of measure used to describe the amount of EtO in the air is called
B. If a negative BI result obtained after a load of processed medical devices is released. C. If there were more than 10 air exchanges per hour in the decontamination area during sterilization. - ANSWER >>>>A. If a positive BI result was obtained after a load of processed medical devices is released. CS technicians must remember the ____________ principle when assembling packs for sterilization A. PACK B. FAN C. ORGANIZE D. SMART - ANSWER >>>>B. FAN During the recommended reuse period of glutaraldehyde-based disinfectant, the CS technician will use test strips to test the glutaraldehyde solution for its A. Minimum density B. Acidic level C. Minimum effective concentration - ANSWER >>>>C. Minimum effective concentration Which of the following instrument labelling methods is done by the CS technician? A. Permanent marker B. Acid based etching C. Dot Matrix - ANSWER >>>>C. Dot Matrix A proactive process designed to predict and prevent future adverse outcomes
A. Root Cause Analysis B. Failure mode and effect analysis C. Six Sigma - ANSWER >>>>B. Failure mode and effect analysis automated supply replenishment systems: - are computarized automatic endoscope reprocessors are not recommended for flexible endoscopes - true automatic washers clean using a spray force action called: - impingement bacteria that require free oxygen are called BLANK bacteria - aerobic before an item can be placed in a liquid chemical sterile processing system they must be: - cleaned behavior relating to what is right and wrong relative to the standards of conduct for your profession are called: - ethical behavior biological test should be performed in an ethylene oxide sterilizer