CBET Sterilization and Infection Control Equipment 2

Question 1

What is the minimum concentration of glutaraldehyde required for high-level disinfection of semicritical medical devices?

Accepted Answer

2.0%

Answer

A minimum concentration of 2% glutaraldehyde is required to achieve high-level disinfection within the recommended contact time.

Question 2

Which type of chemical indicator confirms that a package was exposed to sterilization conditions, not just that sterilization was achieved?

Accepted Answer

Class 1 process indicator

Answer

Class 1 process indicators (e.g., autoclave tape) only show that an item was processed; they do not confirm sterilization conditions were met.

Question 3

Dry heat sterilization at 160°C requires what minimum exposure time to achieve sterilization?

Accepted Answer

120 minutes

Answer

Dry heat sterilization at 160°C (320°F) requires a minimum of 120 minutes to kill all microorganisms, as dry heat is less efficient than moist heat.

Question 4

A washer-disinfector used for surgical instrument reprocessing must achieve what temperature during the thermal disinfection phase to meet A0 600 standard?

Accepted Answer

90°C for 1 minute

Answer

An A0 value of 600 can be achieved at 90°C for 1 minute, which is the thermal disinfection threshold meeting ISO 15883 standards.

Question 5

Which factor most significantly reduces the effectiveness of chemical sterilants and disinfectants?

Accepted Answer

Presence of organic matter (bioburden)

Answer

Organic matter such as blood, tissue, and protein deposits inactivates chemical disinfectants and sterilants, making thorough cleaning before disinfection critical.

CBET - Certified Biomedical Equipment Technician Practice Test

CBET - Certified Biomedical Equipment Technician Practice Test

CBET Sterilization and Infection Control Equipment 2