CMI Infection Control & Sanitation

Question 1

What is the primary difference between sanitizing and disinfecting a surface?

Accepted Answer

Sanitizing reduces microbial counts to safe levels while disinfecting kills a broader spectrum of pathogens

Answer

Sanitizing reduces microbial populations to levels considered safe by public health standards, while disinfecting kills a much broader and more complete range of pathogens including bacteria, viruses, and fungi.

Question 2

What does 'dwell time' (also called contact time) mean when applying a disinfectant?

Accepted Answer

The duration the disinfectant must remain wet on a surface to achieve its labeled kill claims

Answer

Dwell time is the period the disinfectant must remain visibly wet on the surface to kill the pathogens listed on its EPA-registered label.

Question 3

Which of the following pathogens is generally considered the MOST difficult to eliminate with standard disinfectants?

Accepted Answer

Clostridium difficile (C. diff) spores

Answer

C. diff spores are highly resistant to most standard disinfectants and typically require EPA-registered sporicidal agents such as bleach-based products to be effectively eliminated.

Question 4

What is the correct order of steps for infection control cleaning of a surface?

Accepted Answer

Clean (remove soil), then apply disinfectant and allow dwell time

Answer

Organic matter and soil can inactivate disinfectants, so surfaces must be cleaned first to remove debris before applying a disinfectant and allowing adequate dwell time.

Question 5

Cross-contamination in cleaning operations refers to:

Accepted Answer

Transferring pathogens from one surface or area to another via cleaning tools or cloths

Answer

Cross-contamination occurs when microorganisms are inadvertently spread from a contaminated surface to a clean one through tools, cloths, or hands used without proper precautions.

(CMI) Cleaning Management Institute Certification Practice Test

(CMI) Cleaning Management Institute Certification Practice Test

CMI Infection Control & Sanitation