Sterilization and disinfection - CST
exam Questions and Answers 100%
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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 - ✔✔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 - ✔✔A- biological control test
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,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 - ✔✔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 - ✔✔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
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, D- a residual of distilled water should be left inside the lumen - ✔✔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 - ✔✔A- 12 lb
Gravity displacement utilizes ——— to destroy microorganisms:
A- gas
B- radiation
C- gamma rays
D- steam - ✔✔D- steam
The process called cavitation occurs in the :
A- moist heat sterilizer
B- ultrasonic cleaner
C- high-speed pressure sterilizer
D- washer- sterilizer - ✔✔B- ultrasonic cleaner
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exam Questions and Answers 100%
Pass
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 - ✔✔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 - ✔✔A- biological control test
100% Pass Guarantee Olivia West, All Rights Reserved © 2025 1
,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 - ✔✔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 - ✔✔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
100% Pass Guarantee Olivia West, All Rights Reserved © 2025 2
, D- a residual of distilled water should be left inside the lumen - ✔✔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 - ✔✔A- 12 lb
Gravity displacement utilizes ——— to destroy microorganisms:
A- gas
B- radiation
C- gamma rays
D- steam - ✔✔D- steam
The process called cavitation occurs in the :
A- moist heat sterilizer
B- ultrasonic cleaner
C- high-speed pressure sterilizer
D- washer- sterilizer - ✔✔B- ultrasonic cleaner
100% Pass Guarantee Olivia West, All Rights Reserved © 2025 3
