Sterilization and Disinfection - CST Exam with All
Correct & 100% Verified Answers| Latest Version |
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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 ✔Correct Answer--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 ✔Correct Answer--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 ✔Correct Answer--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 ✔Correct Answer--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 ✔Correct Answer--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 ✔Correct Answer--A- 12 lb
Gravity displacement utilizes ——— to destroy microorganisms:
A- gas
B- radiation
C- gamma rays
D- steam ✔Correct Answer--D- steam
, The process called cavitation occurs in the :
A- moist heat sterilizer
B- ultrasonic cleaner
C- high-speed pressure sterilizer
D- washer- sterilizer ✔Correct Answer--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
✔Correct Answer--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 ✔Correct Answer--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 ✔Correct
Answer--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 ✔Correct Answer--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 ✔Correct
Answer--A- basins must be separated by a porous material if they are nested
Why would gas sterilization be chosen over steam sterilization?
A- it is less expensive
B- it is less damaging to items
C- it is faster
D- it is more effective ✔Correct Answer--B- it is less damaging to items
The chemical agent used in gas sterilization is:
A- ethylene glycol
B- ethacrynate sodium
C- Ethyl chloride
Correct & 100% Verified Answers| Latest Version |
Already Graded A+
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 ✔Correct Answer--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 ✔Correct Answer--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 ✔Correct Answer--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 ✔Correct Answer--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 ✔Correct Answer--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 ✔Correct Answer--A- 12 lb
Gravity displacement utilizes ——— to destroy microorganisms:
A- gas
B- radiation
C- gamma rays
D- steam ✔Correct Answer--D- steam
, The process called cavitation occurs in the :
A- moist heat sterilizer
B- ultrasonic cleaner
C- high-speed pressure sterilizer
D- washer- sterilizer ✔Correct Answer--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
✔Correct Answer--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 ✔Correct Answer--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 ✔Correct
Answer--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 ✔Correct Answer--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 ✔Correct
Answer--A- basins must be separated by a porous material if they are nested
Why would gas sterilization be chosen over steam sterilization?
A- it is less expensive
B- it is less damaging to items
C- it is faster
D- it is more effective ✔Correct Answer--B- it is less damaging to items
The chemical agent used in gas sterilization is:
A- ethylene glycol
B- ethacrynate sodium
C- Ethyl chloride
