Cleaning and Sanitizing for the Food Manager Exam
Updated October 27, 2026
Cleaning and sanitizing questions are a reliable part of food protection manager exams such as ServSafe Manager. Most come down to a few rules and numbers from the FDA Food Code. Here’s what to know, followed by free practice questions.
Always follow the sanitizer manufacturer’s label and your local health department’s rules, which can differ from the general numbers below.
Cleaning versus sanitizing
- Cleaning removes food and dirt from a surface.
- Sanitizing reduces pathogens on a clean surface to safe levels.
A surface must be cleaned and rinsed before it is sanitized. Food-contact surfaces must be cleaned and sanitized after each use, when you switch to a different food (such as from raw meat to ready-to-eat food), and at least every 4 hours if in constant use.
Chemical sanitizers
| Sanitizer | Typical concentration |
|---|---|
| Chlorine | 50 to 99 ppm (depends on water temperature and pH) |
| Iodine | 12.5 to 25 ppm |
| Quaternary ammonium (quats) | As stated by the manufacturer |
Check the concentration with the right test kit, and change the solution when it’s dirty or below the required strength. Water temperature, pH, water hardness and contact time all affect how well a sanitizer works.
The three-compartment sink
- Rinse, scrape or soak items before washing.
- Wash in detergent and water at least 110°F.
- Rinse in clean water.
- Sanitize in a chemical sanitizer at the correct concentration for the required time, or in hot water at least 171°F for 30 seconds.
- Air-dry. Never towel-dry.
Dishwashing machines
High-temperature machines must reach a final sanitizing rinse of at least 180°F (165°F for stationary-rack, single-temperature machines). Chemical machines must use the sanitizer at the manufacturer’s concentration and temperature.
Free cleaning and sanitizing practice questions
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What is the correct order of steps for a three-compartment sink?Answer: CWash in detergent, rinse in clean water, sanitize, then air-dry. Sanitizer doesn't work well on a surface that still has food or detergent on it.
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At least how often should food-contact surfaces in constant use be cleaned and sanitized?Answer: BSurfaces in constant use must be cleaned and sanitized at least every 4 hours, as well as after each use and when switching between types of food.
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In a three-compartment sink, what is the minimum water temperature for hot-water sanitizing?Answer: DHot-water sanitizing requires water of at least 171°F for 30 seconds. The wash water needs to be at least 110°F.
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How should items be dried after cleaning and sanitizing?Answer: CItems must be air-dried. Towels can recontaminate cleaned and sanitized surfaces.
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What is the typical concentration range for a chlorine sanitizer?Answer: BChlorine sanitizer is typically 50 to 99 ppm, depending on water temperature and pH. Iodine is 12.5 to 25 ppm, and quats follow the manufacturer's label.
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What must happen before a surface is sanitized?Answer: ACleaning removes food and dirt so the sanitizer can reach and reduce pathogens. Sanitizing a dirty surface doesn't work well.
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Between uses, wet wiping cloths used for wiping food-contact surfaces should be:Answer: CWet wiping cloths should be kept in a sanitizer solution of the correct strength between uses. Change the solution when it's dirty or below the required concentration.
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How should a food handler check that a sanitizer solution is at the correct strength?Answer: DSanitizer test kits or strips matched to the sanitizer type show whether the concentration is right. Too weak won't work, and too strong can be unsafe.
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What is the typical concentration range for an iodine sanitizer?Answer: AIodine sanitizer is typically 12.5 to 25 ppm. Chlorine is typically 50 to 99 ppm, and quats follow the manufacturer's label.
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Where should a mop be cleaned and the mop water dumped?Answer: ADirty water should go into a service sink or curbed floor drain, never a handwashing, food prep or dishwashing sink, to avoid contaminating them.
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Clean and sanitized utensils and tableware should be stored:Answer: BStore clean items at least 6 inches off the floor, in a clean, dry location protected from contamination. Glasses and cups are stored upside down.
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What type of cleaner is used to remove mineral deposits, such as scale in a dishwasher?Answer: CDelimers are acid cleaners used on mineral deposits. Degreasers (alkaline) remove grease, and abrasives scrub off stubborn soil.
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What should be done before items go into a dishwasher?Answer: DScraping, rinsing or soaking first removes food, so the machine can clean and sanitize properly. Then air-dry the items after the cycle.
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Which factors affect how well a chemical sanitizer works?Answer: AConcentration, temperature, contact time, water hardness and pH all affect a sanitizer's effectiveness. Follow the manufacturer's directions.
Pass your food manager exam on the first try
- All 171 questions on foodborne illness, hygiene, storage, cooking and cooling, cleaning and HACCP
- An explanation for every answer, with its source, usually the FDA Food Code section
- Unlimited full 80-question practice exams across all six areas