RCS Health, Safety, and Infection Control 2 — Questions and Answers
Question 1: When cleaning a bathroom used by someone with a confirmed infectious illness, which sequence of cleaning and disinfecting is correct?
- Clean visible dirt first, then apply disinfectant (Correct answer)
- Apply disinfectant first, then wipe away dirt
- Apply disinfectant and clean simultaneously with the same cloth
- Skip cleaning if disinfectant is strong enough
Correct answer: Clean visible dirt first, then apply disinfectant
Surfaces must be cleaned of organic matter first because soil and debris can neutralize disinfectants before they can kill pathogens.
Question 2: A client requests you use bleach and ammonia together to make a stronger disinfectant. What should you do?
- Mix them in a well-ventilated area only
- Refuse, because mixing produces toxic chloramine gas (Correct answer)
- Mix small amounts and use immediately
- Dilute both heavily before combining
Correct answer: Refuse, because mixing produces toxic chloramine gas
Bleach and ammonia react to produce chloramine vapors, which are highly toxic and can cause serious respiratory harm.
Question 3: Which type of glove provides the best protection when handling strong chemical disinfectants like quaternary ammonium compounds?
- Latex exam gloves
- Nitrile chemical-resistant gloves (Correct answer)
- Cotton work gloves
- Vinyl food-service gloves
Correct answer: Nitrile chemical-resistant gloves
Nitrile gloves offer superior chemical resistance compared to latex or vinyl, making them the safest choice for handling concentrated cleaning chemicals.
Question 4: What does the term 'contact time' (dwell time) mean on a disinfectant label?
- The shelf life of the disinfectant after opening
- The minimum time the surface must remain wet to achieve disinfection (Correct answer)
- The time required to mix the disinfectant solution
- The maximum time before the solution must be discarded
Correct answer: The minimum time the surface must remain wet to achieve disinfection
Contact time is the period the surface must stay visibly wet with disinfectant to ensure the pathogen kill claims on the label are achieved.
Question 5: A cleaner accidentally splashes a chemical disinfectant into their eyes. What is the immediate first response?
- Apply a neutralizing solution from the first aid kit
- Flush the eyes continuously with clean water for at least 15 minutes (Correct answer)
- Wipe eyes gently with a dry cloth and seek help
- Put on safety goggles and continue working
Correct answer: Flush the eyes continuously with clean water for at least 15 minutes
Flushing with water for at least 15 minutes dilutes and removes the chemical and is the universally recommended first-aid response for eye chemical exposure.
Question 6: Which surface in a residential home typically harbors the highest concentration of fecal bacteria?
- Toilet seat
- Kitchen sponge (Correct answer)
- Bathroom mirror
- Doorknob
Correct answer: Kitchen sponge
Kitchen sponges are consistently found in studies to harbor extremely high concentrations of bacteria, including fecal coliform, due to their moisture retention and repeated use.
Question 7: Under the OSHA Hazard Communication Standard (HazCom), what document must be accessible to cleaning staff that describes chemical hazards, safe handling, and emergency procedures?
- Material Safety Data Sheet (MSDS) or Safety Data Sheet (SDS) (Correct answer)
- EPA registration certificate
- Product warranty card
- Cleaning product invoice
Correct answer: Material Safety Data Sheet (MSDS) or Safety Data Sheet (SDS)
OSHA's HazCom Standard requires that Safety Data Sheets (formerly MSDS) be readily accessible to workers for every hazardous chemical they may encounter.
RCS Health, Safety, and Infection Control 2
When cleaning a bathroom used by someone with a confirmed infectious illness, which sequence of cleaning and disinfecting is correct?