Food hygiene and safety
Dishwasher Test: Washing, Sanitizing and Chemicals
- Who it is for
- Dishwashers, kitchen porters, kitchen assistants and kitchen trainees
- When to run
- Before starting work in the dish area, then every six months and after violations
- Size
- 17 questions · ~13 min
- Pass mark
- 80%
| Name | Position | Date | Result |
The dishwasher decides whether a guest gets a clean plate or a plate covered in bacteria. This test checks the manual washing sequence, working with the dish machine, sanitizing, safe handling of chemicals, and drying and storing clean dishes — what a dishwasher does every shift.
Temperatures and concentrations in the questions are reference points: take exact values from the dish machine and detergent manufacturers' instructions and the regulations in your country. The question on mixing chemicals is marked critical: a mistake in it is a reason to repeat the briefing before starting a shift.
Manual washing and sanitizing
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1
Put the stages of manual dishwashing in the correct order. Put in the right orderAnswer: c → d → e → a → b. Sanitizing only works on a clean surface, so food residue and grease are removed first, then the detergent is rinsed off. After the sanitizing solution, dishes are rinsed again if the product's instructions require it, and air-dried.
-
2
Why should food residue be removed from dishes before washing? Choose one answerAnswer: c. Grease and food scraps "use up" the detergent and shield bacteria from the sanitizing solution. The water in the sink quickly gets dirty, and dishes come out less clean.
-
3
Why must dishes stay in the sanitizing solution for a set time? Choose one answerAnswer: d. Every sanitizer has a working concentration and contact time stated in its instructions. If you shorten the time or weaken the solution, some microbes will survive.
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4
To make the product work harder, you can mix the solution stronger than the instructions say. True or false?Answer: False. Extra concentration doesn't make things cleaner, but it stays on the dishes, irritates the skin and airways, and damages dishes and equipment faster. The solution is prepared strictly according to the instructions.
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5
How should equipment used for raw meat, fish and eggs be washed? Select all correct answers. Choose all correct answersAnswer: a, c. Boards, knives and containers used for raw meat, fish and eggs are the main source of dangerous bacteria in the dish area. They are not soaked together with dishes for ready-to-eat food, they are washed in hot water with detergent and always sanitized.
Dish machine
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6
What should you check before starting the dish machine at the beginning of a shift? Select all correct answers. Choose all correct answersAnswer: b, c, d. An empty canister or a clogged dispenser, and the machine spends the whole evening washing dishes with plain hot water. Filters and temperatures are checked every shift and recorded in the log, if one is kept.
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7
What is the hot final rinse for in a high-temperature dish machine? Choose one answerAnswer: d. In high-temperature machines the final rinse is often around 80–85 °C (176–185 °F) — the exact value is in the manufacturer's instructions and your country's regulations. Water this hot kills most microbes, and hot dishes dry quickly without a towel. Low-temperature machines sanitize dishes with a chemical instead.
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8
The machine shows that the rinse temperature is below normal. What do you do? Choose one answerAnswer: d. Without the right temperature the machine doesn't sanitize the dishes, and a double cycle won't fix that. The fault is recorded and reported to the manager, and until it's repaired dishes are washed and sanitized by hand or by another method the venue provides for.
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9
Dishes can be packed tightly and overlapping in the machine rack: more gets washed in one cycle that way. True or false?Answer: False. Water and detergent must reach every surface. Overlapping plates and cups placed the wrong way up stay dirty and have to be rewashed. The rack is loaded according to the manufacturer's layout.
Chemicals and safety
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10
Can a chlorine-based product be mixed with an acidic one (for example, a descaler)? Choose one answer Critical questionAnswer: b. Chlorine-based products release chlorine when they come into contact with acids — a toxic gas that harms the eyes and lungs even in small amounts. Never mix any products together unless the instructions explicitly allow it.
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11
Which rules for working with detergents and sanitizers are correct? Select all correct answers. Choose all correct answersAnswer: a, c, d. Chemicals in a water or juice bottle are a common cause of poisoning: people mistake them for a drink. Products are kept only in their own labeled container, away from food, and diluted according to the instructions. Gloves and goggles protect the skin and eyes from burns.
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12
If detergent gets in your eyes, it's enough to wipe them with a tissue and carry on working. True or false?Answer: False. Eyes are rinsed immediately with plenty of clean running water for at least 15 minutes, the manager is informed and a doctor is consulted if needed. What to do for a specific product is stated in its safety data sheet and on the label.
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13
A glass has broken in a sink full of soapy water. What do you do? Choose one answerAnswer: c. Shards are invisible in cloudy water, and your hand can catch a sharp edge. First drain the water, then collect the glass with a brush and dustpan while wearing gloves, and throw it into a separate container. Dishes from that sink are rewashed.
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14
The floor in the dish area is constantly wet. How do you reduce the risk of falling? Choose one answerAnswer: a. A wet floor next to dishes and glass is one of the main causes of kitchen injuries. Puddles are wiped up immediately, wet areas are marked with a sign, and the dishwasher wears closed non-slip shoes. Cardboard gets soaked and becomes slippery itself.
Drying, storage and order
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15
What is the right way to dry dishes after washing? Choose one answerAnswer: d. A reusable towel collects bacteria over a shift and transfers them onto clean dishes. Dishes air-dry on a rack; in a wet stack water is trapped and microbes multiply in it.
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16
You find a plate with a chipped edge. What do you do? Choose one answerAnswer: a. A chip can cut a guest or employee, dirt and bacteria collect in cracks, and fragments can end up in food. Chipped dishes are taken out of circulation immediately and written off.
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17
Where should clean dishes and equipment be stored? Choose one answerAnswer: b. Clean dishes are stored where splashes from dirty dishes and dust from the floor can't reach them: on shelving off the floor, upside down or covered, away from the dirty-dish drop-off area.
Your result
· Pass mark is 80%. Correct answers and explanations are shown below. A mistake in a critical question fails the test regardless of the score.
Use the test as a starting point and align answers with your standards and local regulations.
Answer key · Dishwasher Test: Washing, Sanitizing and Chemicals
- c → d → e → a → b
- c
- d
- False
- a, c
- b, c, d
- d
- d
- False
- b
- a, c, d
- False
- c
- a
- d
- a
- b
jeCheck · https://jecheck.io/en/templates/tests/dishwasher-sanitation
Frequently asked questions
The test has 17 questions and takes about 13 minutes. The passing score is 80%; a mistake in the critical question on mixing chemicals means the test is failed.
Dish machine settings and product dosages depend on the model and manufacturer, and requirements depend on the regulations in your country. Take exact values from the instructions and local rules and adjust the questions if needed.
Yes: the questions are short and based on practical situations. The test is easy to take on a phone, and a mentor can go through mistakes with the employee using the explanations.
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