CRCST Preparation and Packaging Practice Test

25 practice questions

Choose an answer, then check it under Show answer.

1. Question 1 of 25Medium

   When maintaining an instrument lubricant dipping bath in the preparation area, which practice helps prevent bacterial growth?

   1. AA. Topping off the bath daily with freshly mixed lubricant concentrate
   2. BB. Discarding the bath solution per the manufacturer instructions
   3. CC. Autoclaving the prepared bath basin before each shift begins
   4. DD. Adding isopropyl alcohol to the bath to suppress microbial growth
   Show answer to question 1

   Answer: B. Discarding the bath solution per the manufacturer instructions

   Lubricant baths can become reservoirs for microorganisms, particularly Gram-negative bacteria, and must be completely discarded and refreshed according to the manufacturer's instructions for use. Adding alcohol or continually topping off the basin alters chemical concentration and fails to eliminate microbial contamination.

2. Question 2 of 25Easy

   What must a central service technician verify when placing a single-use disposable filter into a rigid sterilization container lid?

   1. AA. Two filters are layered together to provide an extra bacterial barrier
   2. BB. The filter is saturated with instrument lubricant prior to placement
   3. CC. The filter has been run through a thermal wash cycle before use
   4. DD. The filter is free of pinholes and completely covers the perforated pattern
   Show answer to question 2

   Answer: D. The filter is free of pinholes and completely covers the perforated pattern

   Disposable filters must be inspected for tears, pinholes, and creases, and they must fully cover the entire perforated pattern to maintain sterility. Layering two filters when only one is specified impedes sterilant penetration and evacuation, and filters must remain clean and dry prior to processing.

3. Question 3 of 25Medium

   A technician slides a pair of forceps into a peel pouch and finds that the tips press against the bottom seal and the open end can barely be sealed. What should the technician do?

   1. AA. Seal it anyway, since a snug pouch keeps the forceps from moving
   2. BB. Seal the open end closer to the edge to make a little more room
   3. CC. Angle the forceps across the pouch so the tips clear the seal
   4. DD. Use a larger pouch that leaves space between the item and seals
   Show answer to question 3

   Answer: D. Use a larger pouch that leaves space between the item and seals

   A pouch should be large enough to leave space around the item, so the item does not press on the seals and the pouch can be sealed without strain. An overfilled pouch can rupture or open at the seals.

   Why the other options are wrong

   • AA pouch that is too tight stresses the seals, which can open during sterilization or handling.
   • BSealing at the very edge leaves a weak seal and still crowds the item.
   • CAngling the forceps does not create the space needed and leaves the tips pressing on the pouch.

4. Question 4 of 25Medium

   Which group of details represents the minimum essential information required on a package label prior to sterilization?

   1. AA. Decontamination technician initials, washer number, and detergent lot
   2. BB. Surgeon name, procedure date, and patient medical record number
   3. CC. Package description, assembler identifier, and lot control number
   4. DD. Package gross weight, sterilizer exposure time, and drying interval
   Show answer to question 4

   Answer: C. Package description, assembler identifier, and lot control number

   Sterilized packages must identify what the package contains, who assembled it, and the lot control tracking data to allow for quality tracing and recalls. Patient-specific details such as surgeon name or medical record number are not standard pre-sterilization packaging requirements and violate privacy when sets are inventoried for general use.

5. Question 5 of 25Hard

   A technician places all the heavy orthopedic instruments at one end of a large tray and the light instruments at the other end. The set is under the weight limit. Why should the arrangement be changed?

   1. AA. Heavy items must sit at the end of the tray nearest the sterilizer door
   2. BB. The light instruments will reach temperature too fast and become brittle
   3. CC. Heavy and light instruments belong in separate trays, so the set must be split
   4. DD. Metal massed at one end heats and dries unevenly, raising the risk of a wet pack
   Show answer to question 5

   Answer: D. Metal massed at one end heats and dries unevenly, raising the risk of a wet pack

   Weight should be spread evenly across the tray. A concentrated mass of metal heats more slowly and forms more condensate in one area, which can leave that part of the set wet, and a balanced tray is also safer to lift.

   Why the other options are wrong

   • ANo rule ties heavy items to the door end, and loading position does not correct a poorly balanced tray.
   • BLighter instruments do not become brittle from heating faster; uneven heating and drying of the heavy end is the concern.
   • CHeavy and light instruments can share a tray as long as the weight is spread evenly across it.

6. Question 6 of 25Easy

   At what point in processing are hinged surgical instruments treated with a water-soluble instrument lubricant?

   1. AA. After cleaning and before packaging for sterilization
   2. BB. Before cleaning, to loosen dried blood in the box locks
   3. CC. After sterilization, just before the set is opened
   4. DD. At point of use, while the instruments are still soiled
   Show answer to question 6

   Answer: A. After cleaning and before packaging for sterilization

   Lubricant is applied to clean instruments, usually in the washer's final phase or by hand during preparation, before they are packaged for sterilization. Applying it to clean items protects moving parts without trapping soil.

   Why the other options are wrong

   • BLubricant on soiled instruments would coat blood and debris rather than help remove them.
   • CHandling sterile instruments to lubricate them would break sterility.
   • DPoint-of-use treatment keeps soil moist with products made for that purpose, not with instrument lubricant.

7. Question 7 of 25Hard

   During borescope inspection of the working channel of a cleaned flexible ureteroscope, a technician sees no debris, but the channel lining has a deep scratch and an area that appears to be peeling. What should the technician do?

   1. AA. Return the scope to decontamination for recleaning, then package it if no debris is seen
   2. BB. Remove the scope from service and report the channel damage for repair evaluation
   3. CC. Package the scope as usual and report the channel scratch to the supervisor later
   4. DD. Flush the channel with lubricant to smooth the damaged lining, then package the scope
   Show answer to question 7

   Answer: B. Remove the scope from service and report the channel damage for repair evaluation

   Scratches and peeling inside a channel create surfaces where soil and biofilm can collect and resist cleaning, so the scope is removed from service and reported for repair evaluation. Recleaning cannot fix physical damage.

   Why the other options are wrong

   • AThe problem is damage, not soil, so recleaning leaves the defect in place.
   • CA damaged channel can harbor microorganisms, so the scope must not be released while a report waits.
   • DLubricant cannot repair a damaged channel lining and would leave residue inside the scope.

8. Question 8 of 25Medium

   Which method is preferred for permanently identifying individual surgical instruments for tracking?

   1. AA. Laser marking done by the instrument maker or by a vendor it approves
   2. BB. Engraving with a vibrating pen, following the engraving pen maker's instructions
   3. CC. A colored band of heat-resistant nail polish painted around one finger ring
   4. DD. Numbers stamped into the shank with a steel punch and a small hammer
   Show answer to question 8

   Answer: A. Laser marking done by the instrument maker or by a vendor it approves

   Laser marking applied by the manufacturer, or by a vendor using a method the manufacturer approves, creates a permanent mark with minimal effect on the surface, without the grooves or cracks that hand engraving and stamping leave.

   Why the other options are wrong

   • BVibrating-pen engraving cuts into the surface, damaging the protective finish and leaving grooves that can hold soil and start corrosion.
   • CNail polish chips and flakes, so pieces can fall into a surgical site, and it does not provide durable identification.
   • DStamping can crack or distort the metal and leaves indentations that are hard to clean.

9. Question 9 of 25Medium

   A technician passes a borescope through the lumen of a cleaned rigid suction cannula and sees dark flecks of debris along the inner wall. What should the technician do?

   1. AA. Flush the lumen with sterile water at the preparation area sink and then package the cannula
   2. BB. Package the cannula, since the sterilization cycle will kill any organisms in the debris
   3. CC. Return the cannula to decontamination for recleaning, then inspect the lumen again
   4. DD. Remove the cannula from service and send it to the repair vendor for evaluation
   Show answer to question 9

   Answer: C. Return the cannula to decontamination for recleaning, then inspect the lumen again

   Debris inside a lumen means cleaning failed, so the cannula goes back to decontamination to be cleaned again and is reinspected with the borescope before packaging. Retained soil can shield microorganisms from the sterilant.

   Why the other options are wrong

   • ASoiled items are cleaned in decontamination, and a rinse alone will not remove debris stuck to the lumen wall.
   • BSterilization cannot make up for failed cleaning, because soil can block sterilant contact.
   • DDebris is a cleaning problem, not damage, so the cannula needs recleaning rather than repair.

10. Question 10 of 25Hard

    When assembling a dense surgical textile pack for steam sterilization, where should the technician place the internal chemical indicator according to ANSI/AAMI ST79?

    1. AA. In two diagonally opposite corners of the top layer
    2. BB. In the geometric center of the linen pack
    3. CC. Between the outermost linen layer and the outer wrap
    4. DD. Directly beneath the chemical indicator tape on the exterior
    Show answer to question 10

    Answer: B. In the geometric center of the linen pack

    In textile packs, steam must penetrate dense woven fabric layers to displace air and heat the material, making the geometric center the location of greatest resistance to sterilant penetration. Placing the indicator between the outer linen layer and the wrapper is incorrect because superficial layers are rapidly exposed to steam and do not represent internal sterilization conditions.

11. Question 11 of 25Medium

    A preceptor is showing a new technician how firmly to apply wrap around a heavy instrument tray. Which guidance is correct?

    1. AA. As tight as possible, so the tray cannot shift inside the wrap
    2. BB. Snug enough to hold its shape, without straining at the corners
    3. CC. Loosely, so the wrap can expand during the vacuum phase
    4. DD. Tight at the corners and loose over the top, so steam can enter at the folds
    Show answer to question 11

    Answer: B. Snug enough to hold its shape, without straining at the corners

    Wrap is applied snugly enough to hold its shape without gaps, but not so tightly that it strains at corners and edges. Wrap pulled too tight can tear or develop pinholes, and loose wrap can gape or come open, so either error weakens the barrier.

    Why the other options are wrong

    • AWrap pulled as tight as possible strains at corners and edges and can tear or form pinholes.
    • CLoose wrap can gape or snag, and it needs no slack for the vacuum phase because air passes through the wrap material.
    • DSterilant passes through the wrap material, not through gaps at the folds, and over-tight corners can tear.

12. Question 12 of 25Easy

    While assembling a set, a technician places six identical curved hemostats on a stringer. How should their curved jaws be arranged?

    1. AA. All pointing the same way, so they line up and are easy to count
    2. BB. Alternating left and right, so the stringer stays balanced
    3. CC. In facing pairs, so the tips of each pair shield each other
    4. DD. In any direction, since the scrub person sorts them at the field
    Show answer to question 12

    Answer: A. All pointing the same way, so they line up and are easy to count

    Curved instruments are placed on a stringer with their curves facing the same direction, so like instruments line up neatly and the user can identify and count them quickly. An orderly, consistent arrangement is part of assembling a set correctly.

    Why the other options are wrong

    • BHemostats are light, so balance is not a concern, and alternating curves makes the instruments harder to identify and count.
    • CFacing pairs let the fine tips touch and catch on each other, and the mixed directions slow identification and counting.
    • DA set is assembled so the user receives instruments organized and ready, not left for the scrub person to sort.

13. Question 13 of 25Medium

    A technician has just wrapped a tray in a department that labels wrapped packages by hand. Where should the label information be written?

    1. AA. Directly on the outer wrap, beside the indicator tape
    2. BB. On the indicator tape or a label affixed to the wrap
    3. CC. On a paper label placed between the two layers of wrap
    4. DD. On the inner wrap, so the label stays with the tray
    Show answer to question 13

    Answer: B. On the indicator tape or a label affixed to the wrap

    Writing on wrapped packages goes on the indicator tape or on a label designed for the package, not on the wrap itself, because ink or pressure on the wrap can damage the barrier or bleed through.

    Why the other options are wrong

    • AWriting directly on the wrap can damage the barrier or let ink bleed through.
    • CA label between layers cannot be read before opening and adds material that is not part of the tested package.
    • DWriting on the inner wrap risks that barrier layer and cannot be read from outside the package.

14. Question 14 of 25Medium

    A basket of instruments arrives in the preparation area straight from the washer-disinfector and is still hot. What should the technician do before inspecting the instruments?

    1. AA. Leave the basket on a rack until the instruments are cool enough to handle
    2. BB. Rinse the instruments under cool tap water so that inspection can start at once
    3. CC. Start inspecting at once with exam gloves, since the instruments are clean
    4. DD. Tip the basket out onto a cotton towel so that the instruments cool faster
    Show answer to question 14

    Answer: A. Leave the basket on a rack until the instruments are cool enough to handle

    Instruments leave the thermal rinse and drying phases of a washer-disinfector hot enough to burn skin. The basket stays on a rack until the instruments are cool enough to handle safely, and then inspection begins.

    Why the other options are wrong

    • BTap water can leave minerals and waterborne microorganisms on cleaned instruments and wets them again before packaging.
    • CThin exam gloves give little protection from hot metal, so handling the instruments now risks burns.
    • DCotton towels shed lint onto cleaned instruments, and tipping out hot instruments risks burns and damage.

15. Question 15 of 25Hard

    Department policy, based on the cable manufacturer's IFU, removes a fiber-optic light cable from service when more than 20% of its fibers appear dark. A technician holds one end of a cleaned cable toward the room lights and sees a few scattered dark dots at the other end, far fewer than 20% of the fibers. The jacket and both ends are intact. What should the technician do?

    1. AA. Return the cable to its set, since the dark fibers are within the allowed limit
    2. BB. Remove the cable from service, since any dark fiber means the cable has failed
    3. CC. Send the cable back to decontamination, since dark dots usually mean retained soil
    4. DD. Connect it to a light source and look straight into the lit end to count the fibers
    Show answer to question 15

    Answer: A. Return the cable to its set, since the dark fibers are within the allowed limit

    Dark dots in this check are broken fibers that no longer carry light, and a few are expected as cables age. The stated policy sets removal at more than 20% dark fibers, so a cable well under that limit with an intact jacket and ends goes back in its set.

    Why the other options are wrong

    • BSome broken fibers are expected, and removal follows the stated threshold rather than a zero-tolerance rule.
    • CDark dots in this check come from broken fibers, not from soil on the cable.
    • DLooking into a lit light cable can injure the eyes, and the room-light check already shows the fibers.

16. Question 16 of 25Medium

    Under magnification, a technician sees a reddish-brown spot on the jaw of a Kocher clamp, and the metal beneath the spot is rough and pitted. What should the technician do?

    1. AA. Scrub the spot off with a steel wool pad, then package the clamp in its set
    2. BB. Coat the spot with lubricant to keep the rust from spreading, then package it
    3. CC. Remove the clamp from service and route it for evaluation or replacement
    4. DD. Send it back to decontamination for recleaning and package it if the spot fades
    Show answer to question 16

    Answer: C. Remove the clamp from service and route it for evaluation or replacement

    Pitting is corrosion damage in the metal itself, and pits can hold soil and microorganisms that cleaning cannot reach. A pitted instrument is taken out of service for evaluation by a repair service or replacement.

    Why the other options are wrong

    • ASteel wool scratches the surface, can leave metal particles that rust and does not repair pitting.
    • BLubricant does not stop corrosion and would only cover damaged metal that is no longer safe to use.
    • DRecleaning may lighten a stain, but the pits remain and can still trap soil and microorganisms.

17. Question 17 of 25Medium

    The count sheet for a bowel resection set lists two Babcock forceps. Which instrument should the technician look for?

    1. AA. Ring-handled forceps with a ratchet and several sharp, interlocking teeth at the tips
    2. BB. Ring-handled forceps with a ratchet, heavy serrated jaws and 1x2 teeth at the tip
    3. CC. Ring-handled forceps with a ratchet and wide, rounded, fenestrated tips without teeth
    4. DD. Ring-handled forceps with a ratchet and jaws bent at a right angle to the shanks
    Show answer to question 17

    Answer: C. Ring-handled forceps with a ratchet and wide, rounded, fenestrated tips without teeth

    Babcock forceps have wide, rounded, fenestrated jaws without teeth that hold delicate tubular structures, such as bowel or a fallopian tube, without crushing or piercing them.

    Why the other options are wrong

    • ASeveral fine, sharp interlocking teeth at the tips describe Allis forceps, which hold firmer tissue and can injure delicate bowel.
    • BHeavy serrated jaws with 1x2 teeth at the tip describe a Kocher clamp, used to grasp dense tissue.
    • DJaws bent at a right angle describe a right-angle clamp, used to dissect around vessels and pass ligatures.

18. Question 18 of 25Easy

    When a technician closes a hemostat and gently pushes the jaws from side to side, they wobble noticeably at the box lock. What does this finding mean?

    1. AA. The box lock needs more lubricant before the hemostat is packaged
    2. BB. Soil is trapped in the box lock and the hemostat must be recleaned
    3. CC. The play is normal and lets the jaws seat evenly on tissue
    4. DD. The box lock is worn or loose, and the hemostat needs repair
    Show answer to question 18

    Answer: D. The box lock is worn or loose, and the hemostat needs repair

    A box lock should hold the jaws in line with little side-to-side movement. Noticeable wobble shows wear or loosening that lets the jaws shift out of alignment, so the hemostat is removed from service for repair.

    Why the other options are wrong

    • ALubricant eases stiffness; it cannot take up the extra play of a worn box lock.
    • BTrapped soil tends to make a box lock stiff, not loose.
    • CSide-to-side play lets the jaws shift and slip, so it is a defect rather than a normal feature.

19. Question 19 of 25Easy

    What is the main reason insulated laparoscopic electrosurgical instruments are checked with an insulation tester during preparation?

    1. AA. It confirms that the instrument conducts enough current to cut and coagulate
    2. BB. It checks that the cord connector fits the electrosurgical generator safely
    3. CC. It finds breaks that could let current burn tissue away from the surgical site
    4. DD. It shows whether moisture is still trapped under the insulation layer after drying
    Show answer to question 19

    Answer: C. It finds breaks that could let current burn tissue away from the surgical site

    Current that escapes through a break in the insulation can burn the patient's tissue away from the surgical site, out of the surgeon's view. The tester finds these breaks so the instrument can be removed from service before it reaches a patient.

    Why the other options are wrong

    • AThe tester looks for current escaping through damaged insulation; it does not measure how well the tip cuts or coagulates.
    • BThe tester checks the insulation along the shaft for breaks; it does not test how a cord connector fits the generator.
    • DThe tester detects breaks in the insulation by the current that escapes through them; it does not measure moisture under the insulation.

20. Question 20 of 25Medium

    A technician sets up a water-soluble lubricant bath for hinged instruments. Which practice is correct?

    1. AA. Dilute it beyond the IFU ratio so that a thinner film is left behind
    2. BB. Keep using the same bath for as long as the solution still looks clear
    3. CC. Mix it at the IFU ratio and replace it on the schedule its IFU sets
    4. DD. Top it off with fresh concentrate each morning instead of emptying it
    Show answer to question 20

    Answer: C. Mix it at the IFU ratio and replace it on the schedule its IFU sets

    A lubricant bath works as intended only when it is mixed at the ratio in its IFU, and a used bath can lose strength or become contaminated, so it is replaced on the schedule its IFU sets.

    Why the other options are wrong

    • AA mix weaker than the IFU ratio may leave too little lubricant on the moving parts to protect them.
    • BA bath can lose strength or become contaminated while it still looks clear, so it is replaced on the schedule its IFU sets.
    • DTopping off leaves old solution in use and changes its strength, so the bath is emptied and freshly mixed instead.

21. Question 21 of 25Easy

    Which description fits Metzenbaum scissors?

    1. AA. Heavy scissors with thick blades used to cut fascia and other tough tissue
    2. BB. Small scissors with short, sharp-pointed blades used in eye and plastic surgery
    3. CC. Angled scissors with a flat, blunt knob on the lower blade for removing bandages
    4. DD. Long, slender scissors with fine blades and blunt tips for dissecting delicate tissue
    Show answer to question 21

    Answer: D. Long, slender scissors with fine blades and blunt tips for dissecting delicate tissue

    Metzenbaum scissors have long shanks relative to their fine, slender blades and usually blunt tips, which suits dissection of delicate tissue, often deep in a body cavity.

    Why the other options are wrong

    • AHeavy blades for cutting tough tissue such as fascia describe Mayo scissors.
    • BSmall scissors with sharp, pointed blades describe iris scissors.
    • CAn angled blade with a blunt knob that slides under a dressing describes bandage scissors.

22. Question 22 of 25Hard

    While assembling a rigid container for a case later today, a technician places a new filter in the lid, but the filter retention plate will not lock into place, even when pressed firmly. What should the technician do?

    1. AA. Tape the plate in place and report the problem after the case
    2. BB. Remove it from use, report it and use another container
    3. CC. Use the container, since the lid gasket seals the container
    4. DD. Close the lid and let its latches hold the plate
    Show answer to question 22

    Answer: B. Remove it from use, report it and use another container

    If the retention plate does not lock, the filter can shift and leave gaps, so the container cannot be relied on to keep its contents sterile. It is removed from use and reported for repair, and the set is packaged in another container so the case can go ahead.

    Why the other options are wrong

    • ATape does not reliably secure the filter, and a defective container should not be used before repair.
    • CThe gasket seals the lid to the base, but a loose filter leaves an open path at the vents.
    • DLatches hold the lid to the base; they do not hold the filter retention plate in place.

23. Question 23 of 25Hard

    Which handling technique is specifically recommended to prevent abrasive holes and tears from developing on the bottom of wrapped instrument trays?

    1. AA. Placing corrugated cardboard sheets beneath wrapped sets on wire shelves
    2. BB. Sliding trays across wire shelving slowly to distribute friction evenly
    3. CC. Lining wire storage shelves with solid, non-perforated vinyl shelf liners
    4. DD. Lifting trays completely off storage shelves rather than sliding or dragging them
    Show answer to question 23

    Answer: D. Lifting trays completely off storage shelves rather than sliding or dragging them

    Wrapped packages should always be lifted and never dragged or slid across shelves or counters, as friction from wire or metal surfaces causes scuffs, abrasions, and micro-tears in the wrapping material. Sliding trays slowly still causes abrasive friction that damages the barrier. Corrugated cardboard is prohibited in sterile storage areas because it harbors bacteria, vermin, and sheds particulate matter.

24. Question 24 of 25Easy

    What is the purpose of the tamper-evident lock placed on a rigid sterilization container?

    1. AA. To hold the lid down tightly enough to seal the gasket
    2. BB. To prevent staff from opening the container in storage
    3. CC. To keep the filter retention plates from loosening
    4. DD. To show whether the container was opened since closing
    Show answer to question 24

    Answer: D. To show whether the container was opened since closing

    A tamper-evident lock breaks or changes when the container is opened, so the user can see that the container has not been opened since it was closed in the SP department.

    Why the other options are wrong

    • AThe container's latches hold the lid against the gasket; the tamper-evident lock only shows opening.
    • BThese locks are made to break easily and show opening, not to keep anyone out.
    • CFilter retention plates lock in place on their own and are checked separately during assembly.

25. Question 25 of 25Hard

    A tray of delicate instruments will be sterilized in a vaporized hydrogen peroxide system. To cushion them, a coworker suggests adding pieces of foam saved from a vendor's shipping box. What is the best response?

    1. AA. Use only cushioning inserts that are labeled as compatible with that sterilizer
    2. BB. Use it, since foam that cushions instruments is suitable for any sterilization method
    3. CC. Use folded cotton towels instead, since textiles cushion instruments in any method
    4. DD. Use it, but put it under a tray liner that is labeled for that sterilizer
    Show answer to question 25

    Answer: A. Use only cushioning inserts that are labeled as compatible with that sterilizer

    Materials that absorb hydrogen peroxide, such as some foams and cellulose products, can cancel the cycle or leave residue, so only protective inserts labeled as compatible with that sterilizer are used. Shipping foam is not designed or tested for sterilization.

    Why the other options are wrong

    • BFoams differ, and many absorb moisture or sterilant, so they are not compatible with every sterilization method.
    • CCotton towels are a cellulose product, which absorbs hydrogen peroxide and is not used in these systems.
    • DA compatible liner on top does not change the fact that incompatible, absorbent foam is inside the package.

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