CCMA Infection Control and Sterilization 3

Question 1

What is the purpose of a biological indicator (BI) in autoclave sterilization monitoring?

Accepted Answer

To verify that spore-forming organisms have been killed

Answer

Biological indicators contain resistant spores (usually Geobacillus stearothermophilus) and confirm that the sterilization process was effective if no growth occurs after incubation.

Question 2

Standard precautions apply to which body fluids?

Accepted Answer

Blood and all body fluids except sweat

Answer

Standard precautions treat blood and all body fluids (except sweat) as potentially infectious regardless of the patient's diagnosis.

Question 3

Which hepatitis virus is most commonly transmitted through needlestick injuries in healthcare settings?

Accepted Answer

Hepatitis B

Answer

Hepatitis B virus (HBV) is the most efficiently transmitted bloodborne pathogen via needlestick, with a 6–30% transmission risk from a positive source.

Question 4

What is the recommended bleach dilution for disinfecting surfaces contaminated with blood spills?

Accepted Answer

1:10 (1 part bleach to 10 parts water)

Answer

A 1:10 bleach solution (approximately 5,000–6,000 ppm sodium hypochlorite) is the CDC-recommended concentration for blood spill decontamination.

Question 5

Which isolation category uses a private room, N95 respirator, and negative air pressure?

Accepted Answer

Airborne precautions

Answer

Airborne precautions require a negative-pressure room and fit-tested N95 respirators to prevent spread of pathogens such as TB and measles.

CCMA - Certified Clinical Medical Assistant Practice Test

CCMA - Certified Clinical Medical Assistant Practice Test

CCMA Infection Control and Sterilization 3