CRCST practice questions

Preparation & Packaging: CRCST practice questions and answers

Instrument inspection and identification, set assembly, wraps, pouches, rigid containers and chemical indicators. This topic is about 21% of the CRCST exam. Try each question before opening the answer.

1. 1. A tray is going to be processed in a hydrogen peroxide gas plasma sterilizer. Which packaging material should be used?

   • A. Cotton muslin wrap
   • B. Paper-plastic peel pouches
   • C. Polypropylene nonwoven wrap or Tyvek-plastic pouches validated for that sterilizer
   • D. Paper wrap with a linen towel inside
   Show answer

   C. Polypropylene nonwoven wrap or Tyvek-plastic pouches validated for that sterilizer

   Hydrogen peroxide systems are not compatible with cellulose such as paper, cotton and linen, because these absorb the peroxide and can cause the cycle to cancel. Polypropylene wrap and Tyvek pouches validated for the system are used instead.

2. 2. A vendor brings a loaner tray directly to SPD and says it was cleaned at another facility. What should SPD do?

   • A. Sterilize it right away, since the vendor says it is clean
   • B. Decontaminate, inspect, and assemble the tray per the IFU before sterilizing it
   • C. Send it straight to the OR, since it arrived in a sealed case
   • D. Wipe it with disinfectant and package it
   Show answer

   B. Decontaminate, inspect, and assemble the tray per the IFU before sterilizing it

   Loaner instruments must be fully decontaminated, inspected, and assembled under SPD control, whatever their history, because the receiving facility can't verify how they were handled. Skipping these steps risks surgical site infection.

3. 3. Compared with the decontamination area, how should air pressure in the preparation and packaging area be maintained?

   • A. Positive pressure relative to adjacent areas
   • B. Negative pressure relative to adjacent areas
   • C. Neutral pressure with doors kept open
   • D. Negative pressure only during high-volume shifts
   Show answer

   A. Positive pressure relative to adjacent areas

   Clean work areas such as prep and pack are kept under positive pressure so air flows outward and keeps contaminants from coming in. Negative pressure is right for decontamination, where the goal is to hold contaminated air inside the room.

4. 4. Why is a water-soluble lubricant (instrument milk) used on hinged instruments instead of mineral oil or silicone spray?

   • A. Mineral oil corrodes stainless steel within a few cycles
   • B. Water-soluble lubricants also act as a disinfectant
   • C. Oils are approved only for low-temperature sterilization
   • D. Water-soluble lubricants let the sterilant contact the surface, while oils form a barrier that blocks it
   Show answer

   D. Water-soluble lubricants let the sterilant contact the surface, while oils form a barrier that blocks it

   Oil- and silicone-based products leave a film that steam can't get through, so surfaces under it may not be sterilized. Water-soluble lubricants keep joints moving without getting in the sterilant's way. They are not disinfectants.

5. 5. How should ring-handled instruments be placed in a tray during assembly?

   • A. Closed on the last ratchet tooth to protect the tips
   • B. Closed on the first ratchet tooth to save space
   • C. Open and unlocked, often strung on a stringer or instrument rack
   • D. Closed and held together with a rubber band
   Show answer

   C. Open and unlocked, often strung on a stringer or instrument rack

   Ring-handled instruments go in open and unlocked so the sterilant can reach the box locks and jaw surfaces, and so the metal isn't stressed during heating. Rubber bands block sterilant contact and should not be used.

6. 6. A technician is testing the sharpness of a pair of Metzenbaum scissors. How should the test be done?

   • A. Cut a folded 4x4 gauze sponge and see whether threads pull
   • B. Cut a strip of indicator tape and see whether the edges fray
   • C. Run a fingertip along the blade edge to feel for nicks
   • D. Cut the manufacturer-recommended test material and check that it cuts cleanly to the tips without catching
   Show answer

   D. Cut the manufacturer-recommended test material and check that it cuts cleanly to the tips without catching

   Use the test material the manufacturer recommends: the scissors should cut cleanly all the way to the tips without snagging or folding the material. Gauze and tape don't give a consistent standard, and testing a blade with your finger is unsafe.

7. 7. Which chemical indicator category is designed to tell processed from unprocessed items, such as indicator tape on the outside of a package?

   • A. Type 2 (specific-test indicator)
   • B. Type 5 (integrating indicator)
   • C. Type 6 (emulating indicator)
   • D. Type 1 (process indicator)
   Show answer

   D. Type 1 (process indicator)

   Type 1 process indicators, like external tape, show that a package went through a sterilization process. They don't show that the cycle parameters were met inside the package. A Type 2 is used for specific tests such as the Bowie-Dick, and Types 5 and 6 respond to all critical variables.

8. 8. When an item is double-pouched, which arrangement is correct?

   • A. The same size inner pouch folded to fit inside
   • B. The inner pouch placed paper to plastic with the outer pouch
   • C. The inner pouch sealed inside the outer with its open end unsealed
   • D. A smaller inner pouch, not folded, placed paper to paper with the outer pouch
   Show answer

   D. A smaller inner pouch, not folded, placed paper to paper with the outer pouch

   The inner pouch must be smaller so it fits without folding, and it is oriented paper side to paper side so the sterilant can pass through both layers and air and moisture can escape. Folding or putting plastic against paper blocks penetration and drying.

9. 9. What is the maximum recommended total weight for an instrument set, including its rigid container or wrap?

   • A. 16 pounds
   • B. 35 pounds
   • C. 25 pounds
   • D. 40 pounds
   Show answer

   C. 25 pounds

   Current guidance limits instrument sets to 25 pounds total, container included. Heavier sets are prone to wet packs, are harder for steam to penetrate and dry, and raise ergonomic injury risk for staff.

10. 10. A needle holder has gold-colored ring handles. What does this usually indicate?

    • A. The instrument is made of titanium and can't be steam sterilized
    • B. The jaws have tungsten carbide inserts
    • C. The instrument is a single-use item
    • D. The instrument is for ophthalmic use only
    Show answer

    B. The jaws have tungsten carbide inserts

    Gold handles are an industry convention for tungsten carbide inserts in the jaws or blades. Tungsten carbide is harder and wears longer than stainless steel. Gold handles don't mean the item is single-use or limited to one specialty, and these instruments can usually be steam sterilized.

11. 11. While inspecting a clamp under lighted magnification, a technician sees dried debris in the box lock. What is the correct action?

    • A. Scrub the box lock at the prep table with an alcohol wipe
    • B. Package it anyway, since sterilization will kill any organisms
    • C. Spray it with instrument milk to loosen the debris and then package it
    • D. Send the instrument back to decontamination to be cleaned again
    Show answer

    D. Send the instrument back to decontamination to be cleaned again

    An instrument with visible soil can't be packaged, because soil shields microorganisms from the sterilant. It has to go back to decontamination to be cleaned properly. Wiping it in the clean area brings contamination into prep and pack and doesn't count as validated cleaning.

12. 12. A count sheet lists one item that isn't available for the set. According to typical policy, what should the technician do?

    • A. Substitute a similar instrument without noting it
    • B. Follow department policy: document the missing item on the count sheet and label, and notify the appropriate person
    • C. Leave the set unwrapped until the item turns up, however long it takes
    • D. Package the set and leave the count sheet unchanged
    Show answer

    B. Follow department policy: document the missing item on the count sheet and label, and notify the appropriate person

    Missing items need to be documented on the count sheet and communicated per department policy so the OR team knows before the case. Unrecorded substitutions or incorrect count sheets can lead to case delays and patient-safety problems.