Sterile Processing CRCST Exam Questions & Answers 2026 (21–30)

Question 1

Instruments potentially contaminated with prions (for example from suspected Creutzfeldt-Jakob disease) require special handling because prions are:

TheoryPractice · Accepted Answer

Highly resistant to standard cleaning and sterilization, requiring enhanced protocols. Prions resist normal cleaning and sterilization; suspected cases require enhanced decontamination protocols (special chemicals and/or extended sterilization parameters) per facility policy and guidelines.

Question 2

What is the main reason instruments should not be allowed to sit with dried blood before cleaning?

TheoryPractice · Accepted Answer

Dried blood is harder to remove and can damage instruments and impede sterilization. Dried blood hardens onto instruments, becomes much harder to remove, can corrode surfaces, and can shield microorganisms from the sterilant.

Question 3

Why is mechanical (automated) cleaning generally preferred over manual cleaning when an item is compatible?

TheoryPractice · Accepted Answer

It provides more consistent, standardized, and reproducible cleaning. Automated washers deliver standardized parameters (time, temperature, detergent dosing) every cycle, producing more consistent and reproducible cleaning than manual methods.

Question 4

If a washer-disinfector's thermal disinfection phase is supposed to reach a set temperature but the printout shows it did not, the correct action is to:

TheoryPractice · Accepted Answer

Consider the load improperly processed and reprocess after investigating the failure. If validated thermal-disinfection parameters are not met, the load cannot be considered properly decontaminated and must be reprocessed once the cause is investigated and corrected.

Question 5

Why should delicate microsurgical instruments not be processed loosely with heavy general instruments?

TheoryPractice · Accepted Answer

Heavy instruments can crush or damage delicate tips. Heavy instruments can bend, nick, or break fine tips of microsurgical instruments, so delicate items should be protected and processed separately or in protective holders.

Question 6

Lumens should be flushed during cleaning primarily to:

TheoryPractice · Accepted Answer

Force soil and debris out of the internal channel. Flushing pushes water and detergent through the internal channel to dislodge and carry away soil that brushing alone may not reach.

Question 7

Decontamination areas are typically maintained under negative air pressure relative to adjacent areas in order to:

TheoryPractice · Accepted Answer

Keep contaminated air from flowing into cleaner areas. Negative pressure in decontamination keeps potentially contaminated air contained within the room so it does not flow toward clean processing or sterile storage areas.

Question 8

If instruments cannot be cleaned immediately after use, an acceptable interim measure is to:

TheoryPractice · Accepted Answer

Keep them moist using a product or method intended to prevent soil from drying. When immediate cleaning is not possible, keeping instruments moist (with an enzymatic spray, gel, or covered moist towel as directed) prevents soil from drying and eases later cleaning.

Question 9

Utility gloves worn in decontamination should be inspected for:

TheoryPractice · Accepted Answer

Tears, holes, or punctures before and during use. Utility gloves protect against sharps and chemical exposure, so they must be inspected for tears or holes that would compromise that barrier and replaced when damaged.

Question 10

Why are low-foaming detergents typically used in mechanical washers?

TheoryPractice · Accepted Answer

Excessive foam can cushion soil and interfere with spray-arm impingement and pump action. Too much foam can absorb the mechanical spray action and interfere with pumps, so low-foaming detergents are formulated specifically for automated washer-disinfectors.

Sterile Processing CRCST Exam Questions & Answers 2026 (21–30)

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