Sterilization and disinfection - CST exam
Questions And Answers
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 - 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 - 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 - 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 - 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 - 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 - Answer - A- 12 lb
Gravity displacement utilizes ——— to destroy microorganisms:
A- gas
B- radiation
C- gamma rays
D- steam - 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 - 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
Questions And Answers
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 - 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 - 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 - 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 - 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 - 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 - Answer - A- 12 lb
Gravity displacement utilizes ——— to destroy microorganisms:
A- gas
B- radiation
C- gamma rays
D- steam - 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 - 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
