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CST EXAM STERILIZATION AND DISINFECTION
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CST EXAM STERILIZATION AND DISINFECTION
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CST EXAM STERILIZATION AND DISINFECTIONThe 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 - Answers -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 - Answers -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 - Answers -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 - Answers -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 - Answers -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 - Answers -A- 12 lb
Gravity displacement utilizes ——— to destroy microorganisms:
A- gas
B- radiation
C- gamma rays
, D- steam - Answers -D- steam
The process called cavitation occurs in the :
A- moist heat sterilizer
B- ultrasonic cleaner
C- high-speed pressure sterilizer
D- washer- sterilizer - Answers -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 - Answers -D- solutions may be autoclaved along with other items as long as they
are on the shelf alone
In which procedure would the use of a high level disinfectant be acceptable instrument
preparation?
A- suction lipectomy
B- tracheotomy
C- cystoscopy
D- mediastinoscooy - Answers -C- cystoscopy
In a high-speed flash sterilizer, unwrapped instruments are exposed for a minimum of:
A- 1 minute
B- 3 minutes
C- 5 minutes
D- 10 minutes - Answers -B- 3 minutes
To kill spores, an item must be immersed in a 2% acquiers solution of glutaraldehyde
for:
A- 20 minutes
B- 2 hours
C- 10 hours
D- 24 hours - Answers -C- 10 hours
When placing tubing in an activated glutaraldehyde solution, one should:
A- use a shallow container
B- be certain that the interior of the tubing is completely filled
C- moisten it thoroughly before submersion
D- both B and C - Answers -B- be certain that the interior of the tubing is completely
filled
What is the role of moisture in EO sterilization?
A- the items will dry out during the process if no humidity is added
B- the sterilizer will deteriorate from gas over a period of time if no moisture is added
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