CMI Cleaning Techniques & Best Practices 3 — Questions and Answers
Question 1: What is the correct dilution ratio concept when a label states '1:32'?
- 1 part chemical to 32 parts total solution
- 1 part chemical to 32 parts water (Correct answer)
- 32 parts chemical to 1 part water
- 1 ounce per 32 square feet of surface
Correct answer: 1 part chemical to 32 parts water
A 1:32 dilution ratio means 1 part concentrate is mixed with 32 parts water to create the ready-to-use solution.
Question 2: Which cleaning method is best suited for removing grease from a commercial kitchen floor?
- Cold water mopping with a neutral cleaner
- Hot water extraction with a degreaser (Correct answer)
- Dry sweeping followed by damp mopping
- Buffing with a floor machine
Correct answer: Hot water extraction with a degreaser
Hot water extraction combined with a degreaser emulsifies and lifts grease from floor surfaces more effectively than cold or neutral methods.
Question 3: When cleaning glass surfaces, what technique minimizes streaking?
- Wiping in circular motions
- Applying cleaner liberally and letting it drip dry
- Wiping in a consistent S-pattern or Z-pattern with a squeegee (Correct answer)
- Using a dry cloth first, then a wet cloth
Correct answer: Wiping in a consistent S-pattern or Z-pattern with a squeegee
A consistent S-pattern or Z-pattern with a squeegee removes solution uniformly without re-depositing it, eliminating streaks.
Question 4: What is the recommended procedure when a spill of bloodborne material occurs on a hard surface?
- Wipe up immediately with a dry paper towel and dispose
- Apply an EPA-registered disinfectant, allow dwell time, then clean up while wearing PPE (Correct answer)
- Sprinkle salt to absorb the spill, then sweep up
- Notify management and wait for a specialized contractor
Correct answer: Apply an EPA-registered disinfectant, allow dwell time, then clean up while wearing PPE
OSHA guidelines require using an EPA-registered disinfectant with appropriate dwell time and wearing PPE when cleaning bloodborne material spills.
Question 5: In high-touch area disinfection programs, which surfaces are considered highest priority?
- Walls, ceilings, and baseboards
- Door handles, light switches, elevator buttons, and faucet knobs (Correct answer)
- Windows and mirrors
- Carpeted floors and upholstered furniture
Correct answer: Door handles, light switches, elevator buttons, and faucet knobs
High-touch surfaces like door handles, light switches, elevator buttons, and faucets are most frequently contacted and pose the greatest transmission risk.
Question 6: What is the key advantage of microfiber cloths over traditional cotton cloths in cleaning?
- They are cheaper to purchase
- They remove more bacteria without chemicals due to their split fiber structure (Correct answer)
- They are more absorbent but require more water
- They are disposable and reduce labor time
Correct answer: They remove more bacteria without chemicals due to their split fiber structure
Microfiber's split fiber structure creates edges that physically trap and remove bacteria and particles more effectively than cotton fibers.
Question 7: When should a cleaning technician change their mop water during routine floor mopping?
- Only when the water appears visibly black
- After every room or when the water becomes visibly soiled (Correct answer)
- At the end of the cleaning shift
- Every two hours regardless of appearance
Correct answer: After every room or when the water becomes visibly soiled
Mop water should be changed after each room or when visibly soiled to avoid spreading dirty water, which redeposits soil and pathogens.
CMI Cleaning Techniques & Best Practices 3
What is the correct dilution ratio concept when a label states '1:32'?