CST EXAM- STERILIZATION AND
DISINFECTION QUESTIONS AND
ANSWERS 100% VERIFIED
The amount of pressure necessary in a steam sterilizer set at 250 is: - Correct Answer-
15-17 pounds
Positive assurance that sterilization conditions have been achieved can only be
obtained through: - Correct Answer-biological control test
A wrapped tray of instruments is sterilized in a gravity displacement sterilizer at 250 F
for: - Correct Answer-30 minutes
The minimum exposure time for unwrapped instruments in a flash sterilizer that is set at
270 F (132 C) is: - Correct Answer-3 minutes
When steam is used to sterilize a rubber tubing or catheter: - Correct Answer-a residual
of distilled water should be left inside the lumen
To be sterilized effectively, a linen pack must not weigh more than: - Correct Answer-12
pounds
Gravity displacement utilizes __________________ to destroy microorganisms. -
Correct Answer-steam
The process called cavitation occurs in the: - Correct Answer-ultrasonic cleaner
All of the following statements regarding instrument sets are true EXCEPT: - Correct
Answer-all instruments must be closed
All of the following statements regarding steam sterilization are true EXCEPT: - Correct
Answer-solutions may be autoclaved along with other items as long as they are on a
shelf alone
CELESTINE808
, Wrapped basin sets may be sterilized by steam under pressure at 250F for a minimum
of: - Correct Answer-20 minutes
Which of the following statements regarding the sterilization of basin sets is TRUE? -
Correct Answer-Basins must be separated by a porous material if they are nested
Why would gas sterilization be chosen over steam sterilization? - Correct Answer-It is
less damaging to the items
The chemical agent used in gas sterilization is: - Correct Answer-Ethylene oxide
What chemical system uses parecetic acid as a sterilant? - Correct Answer-STERIS
The lumen of a tubing undergoing ethylene oxide (EO) sterilization is: - Correct Answer-
dried thoroughly
The commercial name for gluteraldehyde is: - Correct Answer-Cidex
A 30-minute single-use sterilization system useful for endoscopes is: - Correct Answer-
STERIS
Which of the following is essential when using shelf of the autoclave in a combined
load-activated gluteraldehyde for sterilization? - Correct Answer-Items must be rinsed
thoroughly in sterile water before use.
What is the shelf life of Cidex? - Correct Answer-14 days
In which procedure would the use of a high-level disinfectant be acceptable instrument
preparation? - Correct Answer-Cystoscopy
In a high-speed flash sterilizer, unwrapped instruments are exposed for a minimum of: -
Correct Answer-3 minutes
To kill spores, an item must be immersed in a 2% aqueous solution of glutaraldehyde
for: - Correct Answer-10 hours
When placing tubing in an activated glutaraldehyde solution, one should: - Correct
Answer-be certain that the interior of the tubing is completely filled
What is the role of moisture in EO sterilization? - Correct Answer-dried spores are
resistant to the gas, so they must be hydrated
"Slow exhaust" in a gravity displacement steam sterilizer is used for: - Correct Answer-
solutions
CELESTINE808
DISINFECTION QUESTIONS AND
ANSWERS 100% VERIFIED
The amount of pressure necessary in a steam sterilizer set at 250 is: - Correct Answer-
15-17 pounds
Positive assurance that sterilization conditions have been achieved can only be
obtained through: - Correct Answer-biological control test
A wrapped tray of instruments is sterilized in a gravity displacement sterilizer at 250 F
for: - Correct Answer-30 minutes
The minimum exposure time for unwrapped instruments in a flash sterilizer that is set at
270 F (132 C) is: - Correct Answer-3 minutes
When steam is used to sterilize a rubber tubing or catheter: - Correct Answer-a residual
of distilled water should be left inside the lumen
To be sterilized effectively, a linen pack must not weigh more than: - Correct Answer-12
pounds
Gravity displacement utilizes __________________ to destroy microorganisms. -
Correct Answer-steam
The process called cavitation occurs in the: - Correct Answer-ultrasonic cleaner
All of the following statements regarding instrument sets are true EXCEPT: - Correct
Answer-all instruments must be closed
All of the following statements regarding steam sterilization are true EXCEPT: - Correct
Answer-solutions may be autoclaved along with other items as long as they are on a
shelf alone
CELESTINE808
, Wrapped basin sets may be sterilized by steam under pressure at 250F for a minimum
of: - Correct Answer-20 minutes
Which of the following statements regarding the sterilization of basin sets is TRUE? -
Correct Answer-Basins must be separated by a porous material if they are nested
Why would gas sterilization be chosen over steam sterilization? - Correct Answer-It is
less damaging to the items
The chemical agent used in gas sterilization is: - Correct Answer-Ethylene oxide
What chemical system uses parecetic acid as a sterilant? - Correct Answer-STERIS
The lumen of a tubing undergoing ethylene oxide (EO) sterilization is: - Correct Answer-
dried thoroughly
The commercial name for gluteraldehyde is: - Correct Answer-Cidex
A 30-minute single-use sterilization system useful for endoscopes is: - Correct Answer-
STERIS
Which of the following is essential when using shelf of the autoclave in a combined
load-activated gluteraldehyde for sterilization? - Correct Answer-Items must be rinsed
thoroughly in sterile water before use.
What is the shelf life of Cidex? - Correct Answer-14 days
In which procedure would the use of a high-level disinfectant be acceptable instrument
preparation? - Correct Answer-Cystoscopy
In a high-speed flash sterilizer, unwrapped instruments are exposed for a minimum of: -
Correct Answer-3 minutes
To kill spores, an item must be immersed in a 2% aqueous solution of glutaraldehyde
for: - Correct Answer-10 hours
When placing tubing in an activated glutaraldehyde solution, one should: - Correct
Answer-be certain that the interior of the tubing is completely filled
What is the role of moisture in EO sterilization? - Correct Answer-dried spores are
resistant to the gas, so they must be hydrated
"Slow exhaust" in a gravity displacement steam sterilizer is used for: - Correct Answer-
solutions
CELESTINE808
