CBET Sterilization and Infection Control Equipment 4

Question 1

Which biological indicator organism is used to validate ethylene oxide (EtO) sterilization cycles?

Accepted Answer

Bacillus atrophaeus

Answer

Geobacillus stearothermophilus

Answer

Clostridium sporogenes

Answer

Staphylococcus aureus

Question 2

A steam autoclave fails its Bowie-Dick test. What is the most likely cause?

Accepted Answer

Air entrapment in the chamber

Answer

Inadequate sterilization time

Answer

Insufficient chemical indicator concentration

Answer

Overloading of instrument trays

Question 3

What is the primary advantage of low-temperature hydrogen peroxide plasma sterilization over EtO?

Accepted Answer

No toxic residuals requiring aeration

Answer

Lower cost per cycle

Answer

Longer shelf life for sterile packages

Answer

Effective on all plastics including polyethylene

Question 4

Which parameter is NOT directly monitored during a standard steam sterilization cycle?

Accepted Answer

Humidity

Answer

Temperature

Answer

Pressure

Answer

Exposure time

Question 5

An ultrasonic cleaner used for pre-sterilization cleaning operates primarily through which mechanism?

Accepted Answer

Acoustic cavitation

Answer

High-temperature water jets

Answer

Chemical enzyme action

Answer

Pressurized detergent spray

Question 6

When performing a spore test on a tabletop autoclave, how often does AAMI recommend routine biological monitoring?

Accepted Answer

Weekly

Answer

Daily

Answer

Monthly

Answer

With every load

Question 7

Which type of packaging material is incompatible with hydrogen peroxide plasma sterilization?

Accepted Answer

Paper/cellulose-based wraps

Answer

Tyvek pouches

Answer

Polypropylene wraps

Answer

Polyester pouches