Dishwasher screening questions: machines, sanitizer checks, pace and youth work rules
On this page
- Know the dish pit before you call
- Knockout questions
- Machine and sanitizing questions with checkable answers
- Chemical safety questions
- Pace and flow questions
- Teen dishwashers: federal youth employment rules
- How dish experience gets overstated, and how it gets undersold
- Scoring the screen
- Legal cautions
- Questions people ask
Dishwasher screening questions should confirm three things: the candidate can keep pace with the kitchen's volume on the machine or sink the kitchen actually has, they know how to check that dishes are being sanitized (temperature or chemical strength, not just "the machine ran"), and they can work the schedule, including late closes. For candidates under 18, a fourth question decides what they may do at all: federal youth employment rules limit both the hours and some of the equipment a teen dishwasher can touch.
Dishwasher is often the hardest kitchen job to keep filled, so the screen should be short and honest about the work. For cooks, use line cook screening questions; for running a fast funnel of entry-level applicants, see high-volume hiring process.
Know the dish pit before you call
Get four facts from the client. They change what a good answer sounds like.
| Fact | Why it matters | Question for the candidate |
|---|---|---|
| Machine type: high-temperature (hot water sanitizing) or low-temperature (chemical sanitizing); door type or conveyor | The checks are different: rinse temperature for one, sanitizer strength for the other | "What kind of dish machine did you run, and how did you know it was sanitizing?" |
| Three-compartment sink for pots and pans | Manual washing has its own steps and checks | "Walk me through washing a sheet pan in the three-compartment sink." |
| Volume and covers | A 400-cover brunch is a different job from a 60-seat café | "On your busiest shift, how many covers did the restaurant do, and were you alone on dish?" |
| Porter duties | Many dish roles include trash, floors, receiving and restocking | "Besides dishes, what else were you responsible for?" |
Knockout questions
| Question | What a strong answer sounds like | Red flags |
|---|---|---|
| The shifts are [days and times], and close usually runs until [time]. Can you work that every week? | A plain yes, or a specific conflict now. | "Just not weekends," for a weekend-heavy restaurant. |
| How will you get home after a late close? | A realistic plan. | Relies on a bus that stops before close, with no backup. |
| The job means standing for the full shift, lifting full bus tubs and racks, and working in heat and water. Can you do that, with or without accommodation? | Yes. | None from the answer. Do not ask about health conditions. |
| Are you 18 or older? (If not, we will schedule within the hours the law allows.) | A yes or no. Ask only this, never a date of birth. | None; it decides scheduling and duties, not eligibility. |
| The rate is [rate]. Does that work? | Yes, or a number. | None, if the number fits the budget. |
Machine and sanitizing questions with checkable answers
The numbers below are from the FDA Food Code 2022, a model code that states and localities adopt with their own changes (as of October 2026). Accept a candidate's local numbers if they explain them; the point is whether they check at all.
| Question | Answer in line with the Food Code | Red flags |
|---|---|---|
| On a high-temperature machine, what should the final rinse reach, and how do you check it? | The hot water sanitizing rinse enters the manifold at no more than 194°F and at least 180°F, or 165°F for a stationary rack, single temperature machine (section 4-501.112). Checks the gauge, and the kitchen may use a heat-sensitive label or thermometer on a plate; utensil surfaces should reach 160°F (section 4-703.11). | "The machine just does it." Never looked at the gauge. |
| On a chemical machine or the sanitizer sink, how do you know the sanitizer is strong enough? | Uses a test strip or kit (the code requires one to be provided, section 4-302.14). For chlorine, 50 to 99 ppm needs at least 75°F at pH 8 or less, or 100°F at pH 10 or less (section 4-501.114). Follows the label for quaternary sanitizers. | Has never used a test strip, or adds "a splash more" bleach by eye. |
| Walk me through the three-compartment sink. | Scrape, wash in detergent water (at least 110°F or the detergent label's temperature, section 4-501.19), rinse in clean water, sanitize for the contact time on the label, air dry. Changes water when it gets dirty or cool. | Skips the sanitizer, or towel-dries everything. |
| What do you do if the machine's temperature or sanitizer reading is low? | Stops running dishes through it, tells the chef or manager, and switches to the three-compartment sink until it is fixed. | Keeps running racks because the line needs plates. |
| How do you handle clean dishes coming out of the machine? | Clean hands, lets them air dry, stacks and stores them so food-contact surfaces are not touched, keeps clean and dirty sides separate. | Stacks plates wet, or racks clean and dirty side by side. |
Chemical safety questions
Dish stations use detergents, sanitizers, delimers and degreasers. Under OSHA's Hazard Communication standard, the employer must train employees on the hazardous chemicals in their work area, so this is a habits question, not a knowledge test.
-
"How did you change a chemical container on the dish machine?"
- Strong answer: gloves and eye protection, swaps the pickup tube to the matching product, labels any transfer container, cleans up spills.
- Red flags: pours one product into another's container.
-
"What would you never mix?"
- Strong answer: knows not to mix cleaning chemicals, especially bleach with ammonia or acids, and to follow the label and the safety data sheet.
- Red flags: mixes products "to make it stronger".
-
"How did you delime the machine, and how often?"
- Strong answer: follows the kitchen's schedule or the machine's indicator, uses the delimer as directed, rinses, and tells the manager when it is done.
- Red flags: no idea what deliming is, on a role where the client expects it.
Pace and flow questions
| Question | What a strong answer sounds like | Red flags |
|---|---|---|
| The line runs out of sauté pans in the middle of a rush. What do you do first? | Pulls pans ahead of plates, runs them through, and gets them back to the line, because cooks cannot cook without them. | Washes everything in the order it arrived. |
| How do you keep the dish pit from backing up? | Scrapes and pre-rinses as bus tubs arrive, racks by type, keeps the machine running full racks, puts away clean items between loads. | "It always backs up." |
| What did closing look like at your last job? | Machine drained and cleaned, screens and curtains cleaned, sinks scrubbed, floors and drains, trash out, everything put away. | "I left when the dishes were done." |
| Why are you leaving your current job? | A specific reason: hours, commute, pay, wanting to learn prep. | A string of short stays each blamed on the chef. Check one reference. |
Teen dishwashers: federal youth employment rules
Federal rules as of October 2026, not legal advice. States set their own youth employment rules, including work permits and hours, and the stricter rule applies. See hiring minors: work permits and confirm with the state labor department.
| Age | Federal rule | Source |
|---|---|---|
| 14 and 15 | May do kitchen work, including operating dishwashers. May clean kitchen equipment and handle hot oil or grease receptacles only when the equipment and liquids are not above 100°F. May only enter freezers momentarily. | 29 CFR 570.34 |
| 14 and 15 | No more than 3 hours on a school day and 18 hours in a school week; 8 hours and 40 hours when school is out; between 7 a.m. and 7 p.m., or 9 p.m. from June 1 through Labor Day. | 29 CFR 570.35 |
| Under 18 | May not operate, set up or clean power-driven meat slicers, among other meat-processing machines. | 29 CFR 570.61 |
| Under 18 | May not operate or unload balers and compactors. 16- and 17-year-olds may load certain scrap paper balers and paper box compactors only when strict safety conditions are met. | 29 CFR 570.63 |
Those rules matter on a screen because a 7 p.m. cutoff rules a 14- or 15-year-old out of a dinner close during the school year, and because closing duties often include the slicer and the trash compactor. Tell the client before you submit a teen candidate, so the schedule and duty list can be set up correctly.
How dish experience gets overstated, and how it gets undersold
- Overstated: "ran the dish station" when another person ran the machine and the candidate scraped and bussed. Ask who loaded and unloaded the machine.
- Overstated: volume quoted for the whole restaurant when there were three dishwashers. Ask how many people were on dish.
- Undersold: candidates who did prep, receiving or closing for the line often leave it off. Ask, because the client may want a dishwasher who can move up to prep.
- Undersold: first-job candidates with no kitchen history. Ask about any job with pace and cleaning (warehouse, cleaning crew, school cafeteria); reliability counts for more than experience here.
Scoring the screen
Pass or fail
- Can work the shifts and closing time (within legal hours for minors).
- Has a way home after close.
- Can do the physical work, with or without accommodation.
- Accepts the rate.
Scored 0 to 2 each (8 possible)
- Sanitizing: checks temperature or sanitizer strength, and stops when it is low.
- Chemical habits: labels, gloves, never mixes.
- Pace: prioritizes what the line needs.
- Closing: describes a full close without prompting.
A short paid working shift settles the rest; see how to run a job trial day.
Legal cautions
Describe the physical demands and ask whether the candidate can meet them with or without accommodation; do not ask about injuries, conditions or medications. Ask whether they are 18 or older, not their age. Ask about availability, not family or religion. Criminal history questions are limited in many places; see ban-the-box interview questions.
Questions people ask
Can a 14- or 15-year-old work as a dishwasher?
Under federal rules, yes, with limits. 29 CFR 570.34 lists kitchen work, including operating dishwashers, among the jobs 14- and 15-year-olds may do, and 29 CFR 570.35 limits their hours, for example to 3 hours on a school day and to work between 7 a.m. and 7 p.m. outside the summer. State law can be stricter, so check both before scheduling.
Can a 16- or 17-year-old dishwasher clean the meat slicer?
No. Federal Hazardous Occupations Order 10, at 29 CFR 570.61, bars workers under 18 from operating, setting up or cleaning power-driven meat slicers, regardless of what is being sliced. Build that into the closing duties for teen dishwashers.
What temperature should a high-temperature dish machine reach?
Under the FDA Food Code 2022, the final hot water sanitizing rinse should enter the manifold at no more than 194°F and at least 180°F for most machines, or 165°F for a stationary rack, single temperature machine. Local codes can differ, so accept the local number if the candidate explains it.
Do dishwashers need a food handler card?
It depends on the state and county, and on how the local rule defines a food handler. The FDA Food Code defines a food employee as someone working with unpackaged food, food equipment or utensils, or food-contact surfaces, which can include the dish station. Ask the health department for the job's location rather than assuming the dish station is exempt.