Food & Cooking · Unit 17
Food Safety and Public Health
Pathogens, allergens and how food is kept safe at scale
Food safety is a systems problem. Individual care matters, but most large outbreaks are failures of process somewhere upstream of the kitchen.
The unit covers the main foodborne pathogens, temperature and time control, allergens and intolerance, HACCP and food standards, and how outbreaks are traced.
This unit breaks down into 18 short steps and 109 questions, starting at difficulty 4 and building to 5. Below you can see exactly what it covers, how the path is structured, and worked examples with explanations.
- Steps
- 18
- Questions
- 109
- Difficulty
- 4-5
What this unit covers
- Foodborne Pathogens
- Allergens and Intolerance
- HACCP and Standards
- Outbreaks and Traceability
- Temperature and Time Control
Where this fits
Needs In the Kitchen. Pairs with Food Systems and the Future.
Where people slip
Food that has been left in the danger zone can be perfectly safe-looking. Smell and appearance are unreliable guides, which is why time and temperature rules exist.
How the unit is structured
Food Safety and Public Health runs as 18 short steps that unlock in order. 13 are practice rounds and 5 are challenge rounds that pull together everything before them. Questions start at difficulty 4 and climb to 5 as you progress.
Challenge rounds
Example questions
30 real questions from this unit, with the answer and the reason behind it, grouped by what they practise. There are 109 in the unit altogether.
Allergens and Intolerance
- Build the sentenceLevel 4
1. Build a sentence about allergens.
Answer: Even tiny traces can trigger a serious reaction
Even tiny traces can trigger a serious reaction.
- Choose all that applyLevel 4
2. Which reduce allergen cross contact? Pick all that apply.
- Separate utensils and boardscorrect
- Thorough cleaning between taskscorrect
- Clear labelling and communicationcorrect
- Using the same fryer for everything
Separate equipment, thorough cleaning and clear labelling all reduce it.
- Fill the blankLevel 4
3. A severe life-threatening allergic reaction is called ____.
- anaphylaxiscorrect
- intolerance
- indigestion
- dehydration
Anaphylaxis needs immediate emergency treatment.
- Multiple choiceLevel 4
4. Why must caterers know exactly what is in each dish?
- So customers with allergies get accurate informationcorrect
- To calculate prices
- To plan the menu order
- There is no need
A customer with an allergy needs accurate information to stay safe.
- True or falseLevel 4
5. Even a tiny trace of an allergen can trigger a reaction in some people.
Answer: True
True, which is why cross contact matters so much.
- Fact or fibLevel 5
6. A may contain label guarantees the allergen is present.
Answer: False
False. It signals possible cross contact, not confirmed presence.
Foodborne Pathogens
- Choose all that applyLevel 4
7. Which are common foodborne pathogens? Pick all that apply.
- Salmonellacorrect
- Campylobactercorrect
- Listeriacorrect
- Brewer's yeast
Salmonella, Campylobacter and Listeria are all significant pathogens.
- Fill the blankLevel 4
8. The number of organisms needed to make someone ill is the ____ dose.
- infectivecorrect
- lethal
- daily
- average
Infective dose varies enormously between pathogens.
- Multiple choiceLevel 4
9. What is a foodborne pathogen?
- A microorganism in food that can make people illcorrect
- Any bacterium at all
- A food preservative
- A type of nutrient
A microorganism carried by food that can cause illness in people.
- Picture questionLevel 4
10. 🍗 What must be done to this raw chicken before it is safe?
- Cook it thoroughly all the way throughcorrect
- Rinse it in the sink
- Leave it at room temperature
- Freeze it briefly
Thorough cooking to the correct internal temperature destroys the pathogens.
- Put in orderLevel 4
11. Put these outbreak response steps in order.
Answer: Detect linked cases -> Investigate the likely source -> Trace the affected batches -> Recall the product -> Review and prevent recurrence
Detect, investigate, trace, recall, review.
- True or falseLevel 4
12. Some food poisoning is caused by toxins rather than by live bacteria.
Answer: True
True, and some toxins survive cooking.
HACCP and Standards
- Choose all that applyLevel 4
13. Which are physical hazards in food? Pick all that apply.
- Glass fragmentscorrect
- Metal shavingscorrect
- Hard plastic piecescorrect
- Salmonella
Glass, metal fragments and hard plastic are all physical hazards.
- Multiple choiceLevel 4
14. Why do food businesses need a written safety plan?
- To identify hazards and set out how they are controlledcorrect
- To advertise the menu
- To record recipes
- For decoration
It sets out the hazards and the controls, so the process is managed rather than left to chance.
- Odd one outLevel 4
15. Which of these is NOT a food safety hazard?
- An unusual flavourcorrect
- Salmonella in chicken
- A glass fragment
- Cleaning chemical residue
An unusual flavour is a quality matter, not a safety hazard.
- True or falseLevel 4
16. Food businesses are usually inspected by public authorities.
Answer: True
True. Inspections check hygiene and record keeping.
- Fill the blankLevel 5
17. Proving a control measure can work in principle is called ____.
- validationcorrect
- monitoring
- auditing
- labelling
Validation establishes capability, verification confirms performance.
- Put in orderLevel 5
18. Put these HACCP steps in order.
Answer: Analyse the hazards -> Identify critical control points -> Set critical limits -> Monitor them -> Take corrective action when needed -> Verify the system works
Analyse hazards, identify control points, set limits, monitor, correct, verify.
Outbreaks and Traceability
- Build the sentenceLevel 4
19. Build a sentence about outbreaks.
Answer: Investigators trace illness back to its source
Investigators trace illness back to its source.
- Choose all that applyLevel 4
20. Which help trace a contaminated product? Pick all that apply.
- Batch and lot codescorrect
- Supplier recordscorrect
- Distribution recordscorrect
- Customer opinions of the taste
Batch codes, supplier records and distribution logs all help.
- Multiple choiceLevel 4
21. What is a food poisoning outbreak?
- Linked cases traced to the same food sourcecorrect
- One person feeling unwell
- A recipe failure
- A supply shortage
Two or more linked cases of illness traced to the same food source.
- True or falseLevel 4
22. A product recall removes an unsafe food from sale.
Answer: True
True, and recalls are publicised so people can check their kitchens.
- Type the answerLevel 4
23. What is the withdrawal of an unsafe product from sale called?
Answer: recall
A recall removes affected batches from the market.
- Fact or fibLevel 5
24. Testing finished products is the most effective way to guarantee food safety.
Answer: False
False. Building safety into the process is far more effective than end testing.
Temperature and Time Control
- Choose all that applyLevel 4
25. Which are basic food safety controls? Pick all that apply.
- Keeping cold food coldcorrect
- Cooking food thoroughlycorrect
- Keeping raw and ready-to-eat food apartcorrect
- Storing everything at room temperature
Chilling, thorough cooking, separation and cleaning are the core controls.
- Fact or fibLevel 4
26. Food left in the danger zone for several hours is still perfectly safe.
Answer: False
False. Bacteria multiply rapidly in that range.
- Multiple choiceLevel 4
27. Why must reheated food be piping hot throughout?
- To destroy bacteria that grew during storagecorrect
- To improve flavour
- To dry it out
- There is no reason
Any bacteria that grew while it was stored must be destroyed.
- Sort into groupsLevel 4
28. Sort each practice as safe or unsafe.
Answer: Chilling leftovers quickly = Safe practice; Cooking chicken right through = Safe practice; Leaving cooked rice out overnight = Unsafe practice; Using the same board for raw meat and salad = Unsafe practice
Simple habits prevent most household food poisoning.
- True or falseLevel 4
29. Hot food held for service should be kept above sixty-three degrees Celsius.
Answer: True
True. Hot holding above that temperature prevents growth.
- Build the sentenceLevel 5
30. Build a sentence about food safety.
Answer: Safety is built into the process not tested afterwards
Safety is built into the process not tested afterwards.
Where these questions come from. Each unit starts as a plan of the concepts it should cover and the difficulty it should span. Questions are written against that plan with AI assistance, then checked by a validator that rejects anything without a single defensible answer, an explanation, or plausible wrong options. How we write questions sets out the whole process, and corrections are fixed in the bank and reach the site and the app the same day.
How you practise
This unit mixes 11 different question formats, so you are recalling and applying rather than recognising the same layout every time.
- Build the sentence
- Choose all that apply
- Fact or fib
- Fill the blank
- Multiple choice
- Odd one out
- Picture question
- Put in order
- Sort into groups
- True or false
- Type the answer
Practise Food Safety and Public Health
109 questions across 18 steps. Start with step one and crawl at your own pace.
Play this unitMore units in Food & Cooking
- What We EatFood groups, meals and where our food comes from
- Fruit and VegetablesGrowing, picking and eating plants
- In the KitchenTools, hygiene and staying safe while you cook
- From Farm to PlateThe journey food takes before it reaches you
- Grains and BreadThe crops that feed the world and the loaves they become
- Dairy and EggsMilk, cheese, butter and the remarkable egg
- Meat, Fish and ProteinProtein foods, how they cook and how they are caught or raised
- Herbs and SpicesFlavour, aroma and the trade that moved the world