Sterilization and disinfection - CST exam
The amount of pressure necessary in a steam sterilizer set at 250 F is:
A- 15-17 lb
B- 20-22 lb
C- 22-25 lb
D- 25-27 lb - ANS A- 15-17 lb
Positive assurance that sterilization conditions have been achieved can only be obtained
through:
A- biological control test
B- beat-sensitive tape
C- color change monitor
D- mechanical indicator - ANS A- biological control test
A wrapped tray of instruments is sterilized in a gravity displacement sterilizer at 250 F for:
A- 10 minutes
B- 15 minutes
C- 30 minutes
D- 40 minutes - ANS C- 30 minutes
The minimum exposure time for unwrapped instruments in a flash sterilizer that is set at 270F
(132 C) is:
A- 2 minutes
B- 3 minutes
C- 5 minutes
D- 7 minutes - ANS B- 3 minutes
When steam is used to sterilize a rubber tubing or catheter:
A- the lumen must be dried thoroughly before the process begins
B- a rubber band may be placed around it so it does unwind
C- it should be fanfolded before wrapping
D- a residual of distilled water should be left inside the lumen - ANS D- a residual of distilled
water should be left inside the lumen
To be sterilized effectively, a linen pack must not weigh more than:
A- 12 lb
B- 14 lb
C- 16 lb
D- 18 lb - ANS A- 12 lb
Gravity displacement utilizes ——— to destroy microorganisms:
, A- gas
B- radiation
C- gamma rays
D- steam - ANS D- steam
The process called cavitation occurs in the :
A- moist heat sterilizer
B- ultrasonic cleaner
C- high-speed pressure sterilizer
D- washer- sterilizer - ANS B- ultrasonic cleaner
All of the following statements regarding steam sterilization are true EXCEPT:
A- flat packages are placed on the shelf on edge
B- small packages, placed one on top of the other, are crisscrossed
C- basins are placed on their sides
D- solutions may be autoclaved along with other items as long as they are on the shelf alone -
ANS D- solutions may be autoclaved along with other items as long as they are on the shelf
alone
Wrapped basin sets may be sterilized by steam under pressure at 250F for a minimum of:
A- 5 minutes
B- 10 minutes
C- 15 minutes
D- 20 minutes - ANS D- 20 minutes
Which of the following statements regarding the sterilization of basin sets is TRUE?:
A- basins must be separated by a porous material if they are nested
B- sponges and linen may be packaged inside the basin to be sterilized
C- basins are placed flat in the autoclave
D- basins must always be placed on the top shelf of the autoclave in the combine load - ANS A-
basins must be separated by a porous material if they are nested
All of the following statements regarding instruments sets are true EXCEPT:
A- instruments must be placed in perforated trays
B- heavy instruments are placed on the bottom
C- all instruments must be closed
D- all detachable parts must be disassembled - ANS C- all instruments must be closed
Which of the following statements regarding the sterilization of basin sets is TRUE:
A- basins must be separated by a porous material if they are nested
B- sponges and linen may be packaged inside the basin to be sterilized
C- basins are placed flat in the autoclave
D- basins must always be placed on the top shelf of the autoclave in the combine load - ANS A-
basins must be separated by a porous material if they are nested
The amount of pressure necessary in a steam sterilizer set at 250 F is:
A- 15-17 lb
B- 20-22 lb
C- 22-25 lb
D- 25-27 lb - ANS A- 15-17 lb
Positive assurance that sterilization conditions have been achieved can only be obtained
through:
A- biological control test
B- beat-sensitive tape
C- color change monitor
D- mechanical indicator - ANS A- biological control test
A wrapped tray of instruments is sterilized in a gravity displacement sterilizer at 250 F for:
A- 10 minutes
B- 15 minutes
C- 30 minutes
D- 40 minutes - ANS C- 30 minutes
The minimum exposure time for unwrapped instruments in a flash sterilizer that is set at 270F
(132 C) is:
A- 2 minutes
B- 3 minutes
C- 5 minutes
D- 7 minutes - ANS B- 3 minutes
When steam is used to sterilize a rubber tubing or catheter:
A- the lumen must be dried thoroughly before the process begins
B- a rubber band may be placed around it so it does unwind
C- it should be fanfolded before wrapping
D- a residual of distilled water should be left inside the lumen - ANS D- a residual of distilled
water should be left inside the lumen
To be sterilized effectively, a linen pack must not weigh more than:
A- 12 lb
B- 14 lb
C- 16 lb
D- 18 lb - ANS A- 12 lb
Gravity displacement utilizes ——— to destroy microorganisms:
, A- gas
B- radiation
C- gamma rays
D- steam - ANS D- steam
The process called cavitation occurs in the :
A- moist heat sterilizer
B- ultrasonic cleaner
C- high-speed pressure sterilizer
D- washer- sterilizer - ANS B- ultrasonic cleaner
All of the following statements regarding steam sterilization are true EXCEPT:
A- flat packages are placed on the shelf on edge
B- small packages, placed one on top of the other, are crisscrossed
C- basins are placed on their sides
D- solutions may be autoclaved along with other items as long as they are on the shelf alone -
ANS D- solutions may be autoclaved along with other items as long as they are on the shelf
alone
Wrapped basin sets may be sterilized by steam under pressure at 250F for a minimum of:
A- 5 minutes
B- 10 minutes
C- 15 minutes
D- 20 minutes - ANS D- 20 minutes
Which of the following statements regarding the sterilization of basin sets is TRUE?:
A- basins must be separated by a porous material if they are nested
B- sponges and linen may be packaged inside the basin to be sterilized
C- basins are placed flat in the autoclave
D- basins must always be placed on the top shelf of the autoclave in the combine load - ANS A-
basins must be separated by a porous material if they are nested
All of the following statements regarding instruments sets are true EXCEPT:
A- instruments must be placed in perforated trays
B- heavy instruments are placed on the bottom
C- all instruments must be closed
D- all detachable parts must be disassembled - ANS C- all instruments must be closed
Which of the following statements regarding the sterilization of basin sets is TRUE:
A- basins must be separated by a porous material if they are nested
B- sponges and linen may be packaged inside the basin to be sterilized
C- basins are placed flat in the autoclave
D- basins must always be placed on the top shelf of the autoclave in the combine load - ANS A-
basins must be separated by a porous material if they are nested
