CMI Best Practices in Cleaning Procedures 2 — Questions and Answers
Question 1: When cleaning restrooms, what is the correct order of operations to prevent cross-contamination?
- Clean toilets first, then sinks, then floors
- Clean floors first, then toilets, then sinks
- Clean high surfaces first, then fixtures, then floors (Correct answer)
- Clean mirrors first, then sinks, then toilets
Correct answer: Clean high surfaces first, then fixtures, then floors
Always clean from top to bottom and from least contaminated to most contaminated surfaces to prevent spreading germs downward.
Question 2: A custodian discovers a blood spill on a hard floor. What is the FIRST step before cleaning?
- Apply disinfectant immediately
- Don appropriate PPE including gloves and face protection (Correct answer)
- Absorb the spill with paper towels
- Ventilate the area by opening windows
Correct answer: Don appropriate PPE including gloves and face protection
PPE must be donned before any contact with bloodborne pathogens to comply with OSHA Bloodborne Pathogen standards.
Question 3: Which mopping technique minimizes re-soiling of clean areas in a large hallway?
- Figure-8 pattern moving forward
- Back-and-forth straight strokes moving forward
- Figure-8 pattern walking backward away from clean area (Correct answer)
- Circular scrubbing motion from center outward
Correct answer: Figure-8 pattern walking backward away from clean area
Walking backward while mopping in a figure-8 pattern ensures the custodian never walks on the freshly cleaned surface.
Question 4: What dwell time is MOST important when using a disinfectant cleaner on a surface?
- The time it takes to wipe the product off
- The time specified on the product label for the surface to remain wet (Correct answer)
- 30 seconds for all disinfectants
- The time needed for the product to dry completely
Correct answer: The time specified on the product label for the surface to remain wet
Disinfectants must remain on the surface for the contact time listed on the EPA-registered label to kill target pathogens.
Question 5: When vacuuming carpet in an office building, which pattern is most efficient and effective?
- Random overlapping strokes
- Overlapping parallel strokes with slow forward and back passes (Correct answer)
- Quick single passes in one direction only
- Circular motions from the center of the room outward
Correct answer: Overlapping parallel strokes with slow forward and back passes
Overlapping parallel strokes with slow passes allow suction to lift embedded soil and ensure complete coverage without missing strips.
Question 6: A cleaning solution is labeled 'dilute 1:32.' How much concentrate should be added to a 32-ounce spray bottle?
- 32 ounces
- 16 ounces
- 2 ounces
- 1 ounce (Correct answer)
Correct answer: 1 ounce
A 1:32 ratio means 1 part concentrate to 32 parts water, so a 32-oz bottle gets 1 oz of concentrate and 31 oz of water.
Question 7: Which practice BEST prevents the spread of pathogens between restroom stalls when using a cleaning cloth?
- Rinse the cloth with water between stalls
- Use a fresh cloth or disposable wipe for each stall (Correct answer)
- Apply more disinfectant to the same cloth between stalls
- Fold the cloth to a clean side between stalls
Correct answer: Use a fresh cloth or disposable wipe for each stall
Using a fresh cloth or disposable wipe for each stall eliminates the risk of transferring pathogens from one surface to another.
CMI Best Practices in Cleaning Procedures 2
When cleaning restrooms, what is the correct order of operations to prevent cross-contamination?