CBSPD STERILE PROCESSING TEST
ACTUAL EXAM 2026/2027 | Verified
Questions & Answers 2023 | Updated
Certification Standards | Comprehensive
Practice Test | Pass Guaranteed - A+
Graded
DOMAIN 1: CLEANING AND DECONTAMINATION (60
Questions)
Q1: [Verified] What is the minimum recommended temperature for the wash phase in an
automated washer-disinfector according to AAMI ST79?
● A. 110°F (43°C)
● B. 150°F (66°C) [CORRECT]
● C. 180°F (82°C)
● D. 212°F (100°C)
Correct Answer: B
Rationale: AAMI ST79:2017 Section 7.6.3.2 specifies that automated washer-disinfectors
should reach a minimum wash temperature of 150°F (66°C) for thermal disinfection.
Temperatures below this may not achieve the required microbial reduction, while 180°F is
typically the minimum for the final rinse/disinfection phase. [VERIFIED]
Q2: [Verified] Which classification of medical device requires the highest level of cleaning
verification before sterilization?
● A. Non-critical devices
● B. Semi-critical devices
● C. Critical devices [CORRECT]
● D. Environmental surfaces
Correct Answer: C
,Rationale: Per Spaulding's classification system and AAMI ST79 Section 3.3.2.1, critical
devices (those entering sterile tissue or vascular system) require the most rigorous cleaning
because any residual soil could introduce infection directly into sterile body sites. Critical
devices include surgical instruments, implants, and intravascular catheters. [VERIFIED]
Q3: [Verified] According to OSHA's Bloodborne Pathogens Standard, how long must
contaminated sharps containers be maintained before disposal?
● A. 30 days
● B. 60 days
● C. 90 days [CORRECT]
● D. 180 days
Correct Answer: C
Rationale: OSHA 29 CFR 1910.1030(d)(4)(iii)(A)(2) requires that sharps containers be closed
when 3/4 full or when no longer in use, and maintained for up to 90 days before disposal. This
prevents overflow and reduces risk of exposure. Containers must be puncture-resistant,
leak-proof, and labeled with the biohazard symbol. [VERIFIED]
Q4: [Verified] What is the primary purpose of enzymatic cleaners in the decontamination
process?
● A. Disinfection of instruments
● B. Breaking down organic soil proteins, fats, and carbohydrates [CORRECT]
● C. Lubrication of instrument hinges
● D. Neutralization of chemical disinfectants
Correct Answer: B
Rationale: Enzymatic cleaners contain proteases, lipases, and amylases that specifically
target organic soils (blood, tissue, fats) that adhere to instruments. AAMI ST79 Section 7.5.1
emphasizes that cleaning must precede disinfection/sterilization, and enzymatic cleaners are
essential for breaking down bioburden that mechanical washing alone cannot remove. They
do not disinfect or lubricate. [VERIFIED]
Q5: [Verified] Which water quality is required for the final rinse of critical devices in
automated washer-disinfectors per AAMI ST79?
● A. Tap water
● B. Softened water
● C. Purified water [CORRECT]
● D. Saline solution
,Correct Answer: C
Rationale: AAMI ST79:2017 Section 7.6.3.4 requires purified water (often deionized or reverse
osmosis) for the final rinse of critical devices to prevent mineral deposits, pyrogens, and
microbial contamination. Tap water contains minerals and microorganisms that could
compromise sterility or damage instruments. [VERIFIED]
Q6: [Verified] What is the maximum recommended time that soiled instruments should
remain dry before cleaning?
● A. 30 minutes
● B. 1 hour
● C. 6 hours [CORRECT]
● D. 24 hours
Correct Answer: C
Rationale: AAMI ST79 Section 7.4.1 recommends cleaning soiled instruments within 6 hours
of use. Dried soils are significantly harder to remove and may require rewetting with
enzymatic solution or water. Beyond 6 hours, biofilm formation risk increases substantially,
making effective cleaning more difficult. [VERIFIED]
Q7: [Verified] Which Personal Protective Equipment (PPE) is REQUIRED by OSHA when
manually cleaning contaminated instruments?
● A. Surgical mask only
● B. Face shield, gloves, gown, and mask [CORRECT]
● C. Gloves only
● D. N95 respirator and gloves
Correct Answer: B
Rationale: OSHA 29 CFR 1910.1030(d)(3)(i) mandates appropriate PPE to prevent exposure to
bloodborne pathogens. During manual cleaning, splashing is likely, requiring face protection
(shield), fluid-resistant gown, utility gloves (puncture-resistant), and mask. This ensemble
protects against splash, spray, and aerosolized contaminants. [VERIFIED]
Q8: [Verified] What is the proper dilution ratio for enzymatic detergent when pre-soaking
heavily soiled instruments?
● A. Use concentrate directly
● B. 1:128 (standard concentration)
● B. 1:256 (light soil)
● C. Follow manufacturer's instructions for heavy soil dilution [CORRECT]
, Correct Answer: C
Rationale: AAMI ST79 Section 7.5.2 requires following manufacturer instructions for dilution
ratios, as enzymatic cleaners vary in concentration and formulation. Heavy soil typically
requires higher concentration (lower dilution ratio) than light soil. Using incorrect dilution
reduces efficacy or wastes product. [VERIFIED]
Q9: [Verified] Which factor MOST significantly reduces the effectiveness of ultrasonic
cleaning?
● A. Using deionized water
● B. Overloading the chamber [CORRECT]
● C. Using enzymatic solution
● D. 5-minute cycle time
Correct Answer: B
Rationale: AAMI ST79 Section 7.6.4 states that overloading the ultrasonic bath prevents
cavitation bubbles from reaching all instrument surfaces. Cavitation requires unobstructed
transmission of sound waves. Overloading creates "shadow areas" where soil remains.
Proper loading ensures instruments are fully submerged and not stacked. [VERIFIED]
Q10: [Verified] What is the minimum frequency for changing ultrasonic cleaning solution?
● A. After each use
● B. Every 4 hours or when visibly soiled [CORRECT]
● C. Daily only
● D. Weekly
Correct Answer: B
Rationale: AAMI ST79 recommends changing ultrasonic solution every 4 hours of use or
when visibly contaminated. Soil accumulation reduces cavitation efficiency and can redeposit
contaminants onto instruments. Some facilities use 8-hour maximum with monitoring, but 4
hours is the conservative standard for high-volume processing. [VERIFIED]
Q11: [Verified] Which cleaning verification method is considered the gold standard for
detecting residual protein on instruments?
● A. Visual inspection
● B. ATP bioluminescence testing
● C. Ortho-phthalaldehyde (OPA) testing
● D. Protein detection swabs (serum albumin tests) [CORRECT]
Correct Answer: D
ACTUAL EXAM 2026/2027 | Verified
Questions & Answers 2023 | Updated
Certification Standards | Comprehensive
Practice Test | Pass Guaranteed - A+
Graded
DOMAIN 1: CLEANING AND DECONTAMINATION (60
Questions)
Q1: [Verified] What is the minimum recommended temperature for the wash phase in an
automated washer-disinfector according to AAMI ST79?
● A. 110°F (43°C)
● B. 150°F (66°C) [CORRECT]
● C. 180°F (82°C)
● D. 212°F (100°C)
Correct Answer: B
Rationale: AAMI ST79:2017 Section 7.6.3.2 specifies that automated washer-disinfectors
should reach a minimum wash temperature of 150°F (66°C) for thermal disinfection.
Temperatures below this may not achieve the required microbial reduction, while 180°F is
typically the minimum for the final rinse/disinfection phase. [VERIFIED]
Q2: [Verified] Which classification of medical device requires the highest level of cleaning
verification before sterilization?
● A. Non-critical devices
● B. Semi-critical devices
● C. Critical devices [CORRECT]
● D. Environmental surfaces
Correct Answer: C
,Rationale: Per Spaulding's classification system and AAMI ST79 Section 3.3.2.1, critical
devices (those entering sterile tissue or vascular system) require the most rigorous cleaning
because any residual soil could introduce infection directly into sterile body sites. Critical
devices include surgical instruments, implants, and intravascular catheters. [VERIFIED]
Q3: [Verified] According to OSHA's Bloodborne Pathogens Standard, how long must
contaminated sharps containers be maintained before disposal?
● A. 30 days
● B. 60 days
● C. 90 days [CORRECT]
● D. 180 days
Correct Answer: C
Rationale: OSHA 29 CFR 1910.1030(d)(4)(iii)(A)(2) requires that sharps containers be closed
when 3/4 full or when no longer in use, and maintained for up to 90 days before disposal. This
prevents overflow and reduces risk of exposure. Containers must be puncture-resistant,
leak-proof, and labeled with the biohazard symbol. [VERIFIED]
Q4: [Verified] What is the primary purpose of enzymatic cleaners in the decontamination
process?
● A. Disinfection of instruments
● B. Breaking down organic soil proteins, fats, and carbohydrates [CORRECT]
● C. Lubrication of instrument hinges
● D. Neutralization of chemical disinfectants
Correct Answer: B
Rationale: Enzymatic cleaners contain proteases, lipases, and amylases that specifically
target organic soils (blood, tissue, fats) that adhere to instruments. AAMI ST79 Section 7.5.1
emphasizes that cleaning must precede disinfection/sterilization, and enzymatic cleaners are
essential for breaking down bioburden that mechanical washing alone cannot remove. They
do not disinfect or lubricate. [VERIFIED]
Q5: [Verified] Which water quality is required for the final rinse of critical devices in
automated washer-disinfectors per AAMI ST79?
● A. Tap water
● B. Softened water
● C. Purified water [CORRECT]
● D. Saline solution
,Correct Answer: C
Rationale: AAMI ST79:2017 Section 7.6.3.4 requires purified water (often deionized or reverse
osmosis) for the final rinse of critical devices to prevent mineral deposits, pyrogens, and
microbial contamination. Tap water contains minerals and microorganisms that could
compromise sterility or damage instruments. [VERIFIED]
Q6: [Verified] What is the maximum recommended time that soiled instruments should
remain dry before cleaning?
● A. 30 minutes
● B. 1 hour
● C. 6 hours [CORRECT]
● D. 24 hours
Correct Answer: C
Rationale: AAMI ST79 Section 7.4.1 recommends cleaning soiled instruments within 6 hours
of use. Dried soils are significantly harder to remove and may require rewetting with
enzymatic solution or water. Beyond 6 hours, biofilm formation risk increases substantially,
making effective cleaning more difficult. [VERIFIED]
Q7: [Verified] Which Personal Protective Equipment (PPE) is REQUIRED by OSHA when
manually cleaning contaminated instruments?
● A. Surgical mask only
● B. Face shield, gloves, gown, and mask [CORRECT]
● C. Gloves only
● D. N95 respirator and gloves
Correct Answer: B
Rationale: OSHA 29 CFR 1910.1030(d)(3)(i) mandates appropriate PPE to prevent exposure to
bloodborne pathogens. During manual cleaning, splashing is likely, requiring face protection
(shield), fluid-resistant gown, utility gloves (puncture-resistant), and mask. This ensemble
protects against splash, spray, and aerosolized contaminants. [VERIFIED]
Q8: [Verified] What is the proper dilution ratio for enzymatic detergent when pre-soaking
heavily soiled instruments?
● A. Use concentrate directly
● B. 1:128 (standard concentration)
● B. 1:256 (light soil)
● C. Follow manufacturer's instructions for heavy soil dilution [CORRECT]
, Correct Answer: C
Rationale: AAMI ST79 Section 7.5.2 requires following manufacturer instructions for dilution
ratios, as enzymatic cleaners vary in concentration and formulation. Heavy soil typically
requires higher concentration (lower dilution ratio) than light soil. Using incorrect dilution
reduces efficacy or wastes product. [VERIFIED]
Q9: [Verified] Which factor MOST significantly reduces the effectiveness of ultrasonic
cleaning?
● A. Using deionized water
● B. Overloading the chamber [CORRECT]
● C. Using enzymatic solution
● D. 5-minute cycle time
Correct Answer: B
Rationale: AAMI ST79 Section 7.6.4 states that overloading the ultrasonic bath prevents
cavitation bubbles from reaching all instrument surfaces. Cavitation requires unobstructed
transmission of sound waves. Overloading creates "shadow areas" where soil remains.
Proper loading ensures instruments are fully submerged and not stacked. [VERIFIED]
Q10: [Verified] What is the minimum frequency for changing ultrasonic cleaning solution?
● A. After each use
● B. Every 4 hours or when visibly soiled [CORRECT]
● C. Daily only
● D. Weekly
Correct Answer: B
Rationale: AAMI ST79 recommends changing ultrasonic solution every 4 hours of use or
when visibly contaminated. Soil accumulation reduces cavitation efficiency and can redeposit
contaminants onto instruments. Some facilities use 8-hour maximum with monitoring, but 4
hours is the conservative standard for high-volume processing. [VERIFIED]
Q11: [Verified] Which cleaning verification method is considered the gold standard for
detecting residual protein on instruments?
● A. Visual inspection
● B. ATP bioluminescence testing
● C. Ortho-phthalaldehyde (OPA) testing
● D. Protein detection swabs (serum albumin tests) [CORRECT]
Correct Answer: D
