Practice: Cleaning and Sanitizing

A cook wipes down a cutting board with a damp cloth after prepping raw chicken. Why is this step alone insufficient?

• Wiping removes pathogens but does not remove grease or food residue

• Wiping sanitizes the surface but skips the rinsing step

• Wiping cleans the surface but does not reduce pathogens to safe levels

• Wiping is only acceptable for non-food-contact surfaces

A foodservice manager sets up a three-compartment sink. What is the correct order of steps for the middle compartment?

• Air dry items before moving to the next compartment

• Wash with hot detergent water to remove food particles

• Rinse with clean water to remove detergent residue

• Sanitize with chemical solution, then rinse with clean water

A kitchen uses a chlorine-based sanitizer. The solution tests at 10 ppm. What should the manager do?

• Increase the concentration because 10 ppm is too low to be effective

• Switch to iodine sanitizer, which is effective at lower concentrations

• Add more water to bring the solution to the correct concentration

• Use the solution immediately, as 10 ppm is within the safe range

Which TWO factors directly affect how well a chemical sanitizer reduces pathogens on a surface?

• Color of the sanitizer solution

• Contact time between sanitizer and surface

• Concentration of the sanitizer solution

• Type of detergent used in the wash step

A prep cook sanitizes a cutting board immediately after washing it with detergent, without rinsing first. What is the main problem with this approach?

• The surface temperature will be too high for sanitizer to work

• Sanitizer applied after detergent will over-concentrate on the surface

• Detergent residue can reduce sanitizer effectiveness

• Skipping the rinse step makes air drying impossible

A manager wants to heat sanitize equipment in a dishwasher. What is the minimum water temperature required for at least 30 seconds?

• 171°F

• 165°F

• 145°F

• 180°F

An operation uses iodine sanitizer in its three-compartment sink. The solution appears very dark brown. What does this indicate?

• The solution has expired and should be replaced with chlorine

• The solution is too concentrated and must be diluted before use

• The water temperature is too low for iodine to activate properly

• The solution is at the correct concentration and ready to use

After sanitizing a food-contact surface, a prep cook dries it immediately with a clean towel. Why is this a problem?

• Towel drying lowers the surface temperature below safe levels

• Using a towel reintroduces the detergent removed during rinsing

• Towel drying removes the sanitizer before it finishes working

• Towel drying is only approved for non-food-contact surfaces

Select all that apply: Which conditions can make a chemical sanitizer LESS effective?

• Using the sanitizer immediately after mixing

• Very hard water with high mineral content

• Water temperature that is too low for the sanitizer type

• Contact time that is shorter than required

A restaurant switches from chlorine sanitizer to quaternary ammonium compounds (quats). What is one key operational difference the manager must communicate?

• Quats require a lower water temperature than chlorine to be effective

• Quats must be used at higher water temperatures than iodine

• Quats are only approved for non-food-contact surfaces

• Quats change color when they drop below safe concentration levels