CRCST CERTIFICATION FINAL EXAM
2025 ACTUAL EXAM QUESTIONS AND
DETAILED CORRECT ANSWERS
(VERIFIED ANSWERS) | A+GRADE
What are not acceptable for use, because they harbor
bacteria, cannot be easily cleaned or disinfected, and
break apart during use, leaving small particles in the
serrations of instruments? Correct Answer sponges
To prevent the formations of __________________ all
cleaning implements should be regularly cleaned and
disinfected or sterilized (at minimum at the end of each
shift). Correct Answer biofilms
This is an automated cleaning equipment, that transmits
sound waves through a cleaning solution. Correct Answer
ultrasonic
This mechanical action is called ___________________ it
is very effective in cleaning hard-to-reach areas such as
box locks, serrations, ratchets, and the teeth on
instruments. Correct Answer cavitation
This type of detergent has a pH level higher than 11.
These detergents are the most effective in removing
heavy organic soils, but may accelerate the corrosion of
surgical instruments and may leave scale deposits on
equipment Correct Answer highly alkaline
,To reduce the potential of corrosion highly alkaline
detergents are best used in a multistep process: first the
alkaline wash, then a ______________________, the a
regular rinse. Correct Answer neutralizing acid rinse
What should not be placed over instruments? Correct
Answer bowls and emisis basins
What type of chemicals are used to process endoscopes?
This process allows endoscopes for immediate reuse at
the end of the process. Correct Answer high-level
disinfectants
Cart washers are mechanical cleaners that
_________________ metal surgical case carts, supply
carts, and even rigid sterilization containers. Correct
Answer sanitize
What types of instruments present unique challenges for
cleaning because of their design and the nature of the
soils deposited on them (fatty marrow soils)? Correct
Answer orthopedic
All orthopedic sets should be soaked in a what type of
enzyme solution that has been prepared in accordance
with the detergent manufacturers instructions? Correct
Answer lipolytic
All instruments and devices received from another facility
or company or owned and brought in by a surgeon for a
, case must be considered contaminated and should be
completely? Correct Answer reprocessed
As for ALL medical devices processed in the CS/SPD,
who is required to provide the instructions for cleaning and
sterilization? Correct Answer manufacturer
Where is the first area to accept responsibilities into the
healthcare facility? Correct Answer recieving
Loaner sets are often multi-level; if so each level should
be cleaned how? Correct Answer seprately
When instruments are "opened but not used" and returned
to the CS/SPD from user departments, they are
considered? Correct Answer contaminated
To prevent damage, powered equipment should never be
immersed in a solution, or come in contact with what type
of solution? Correct Answer saline
Instruments should never be placed on top of fiberoptic
cables because of the _______ inside could be damaged.
Correct Answer glass rods
What type of endoscopes are extremely difficult to clean
because of their numerous small channels (lumens) and
size (some of these devices are more then 6 feet long)?
Correct Answer flexible
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