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Question 1Food safety hazards and contamination
Which of these is a biological food safety hazard?
- A metal bolt from machinery
- Washing-up liquid
- Salmonella bacteria Correct answer.
- A fragment of glass
Explanation
Biological hazards are living organisms or their toxins that can cause illness, and bacteria such as Salmonella fall into this group. The other items are chemical or physical contaminants.
Question 2Food safety hazards and contamination
What is the main reason food handlers must cover cuts with a brightly coloured waterproof plaster?
- To make the plaster easier to find if it falls off
- To stop bacteria and blood entering the food Correct answer.
- To show supervisors that first aid has been given
- To keep the wound dry while washing hands
Explanation
A covered cut prevents bacteria from the wound, and blood, transferring onto food. The coloured waterproof type is used because it is detectable if it is lost, but the primary food safety purpose is preventing contamination.
Question 3Food safety hazards and contamination
Which practice is most likely to cause cross-contamination?
- Defrosting food in a fridge on the bottom shelf
- Using the same cloth to wipe a raw chicken board and then a salad bowl Correct answer.
- Washing hands after handling waste
- Storing dry goods in sealed labelled containers
Explanation
A cloth picks up bacteria from raw meat juices and spreads them to ready-to-eat food, which will not be cooked again. The other practices all reduce contamination risk.
Question 4Food safety hazards and contamination
At which temperature range do food poisoning bacteria multiply most rapidly?
- Between -18°C and -5°C
- Between 5°C and 63°C Correct answer.
- Between 63°C and 75°C
- Between 0°C and 4°C
Explanation
The danger zone of roughly 5°C to 63°C allows bacteria to multiply quickly, with the fastest growth around body temperature. Keeping food outside this range limits multiplication.
Question 5Food safety hazards and contamination
A chef has vomiting and diarrhoea. What should they do?
- Work only with foods that will be cooked thoroughly
- Report to the manager and stay away from food handling Correct answer.
- Wear gloves and continue preparing food
- Take medication and return to the kitchen once symptoms ease
Explanation
Food handlers suffering vomiting or diarrhoea must report it and be excluded from food handling, because pathogens can be spread even with careful practice. Returning too early risks passing infection to consumers.
Question 6Food safety hazards and contamination
Which of these is a physical hazard in food?
- A piece of broken blade in a minced meat mix Correct answer.
- Norovirus on a shellfish
- A cleaning chemical residue
- Mould growing on bread
Explanation
Physical hazards are hard or sharp foreign objects that can injure a consumer, such as metal fragments. Mould, chemicals and viruses are biological or chemical hazards.
Question 7Food safety hazards and contamination
Why should raw and ready-to-eat foods be stored separately in a fridge?
- To keep the fridge from becoming too cold
- To prevent juices from raw food dripping onto food that will not be cooked Correct answer.
- To save space on the shelves
- To make stock rotation easier
Explanation
Raw foods can carry pathogens in their juices, and ready-to-eat foods will not receive a cooking step to destroy them. Separation, with raw food below, prevents this transfer.
Question 8Food safety hazards and contamination
What is the main purpose of thorough hand washing before handling food?
- To soften the skin so gloves fit better
- To remove food smells from the hands
- To remove bacteria and dirt picked up from hands and surfaces Correct answer.
- To meet uniform requirements
Explanation
Correct hand washing physically removes transient bacteria and dirt that could transfer to food. It is a key control against cross-contamination.
Question 9Food safety hazards and contamination
A delivery of frozen chicken arrives partly thawed with visible juices in the packaging. What is the most appropriate action?
- Accept it and refreeze immediately
- Reject the delivery and record the reason Correct answer.
- Accept it and wash the chicken under running water
- Accept it and use it first that day
Explanation
Partly thawed frozen food indicates a break in temperature control, so the safety and quality of the load is in doubt and it should be rejected. The rejection should be recorded so the supplier issue can be followed up.
Question 10Food safety hazards and contamination
Which statement best describes a spore-forming bacterium's significance in food safety?
- Spores are destroyed at 40°C
- Spores can survive normal cooking and later grow if food is cooled slowly Correct answer.
- Spores are a type of chemical hazard
- Spores only affect frozen foods
Explanation
Bacterial spores are heat-resistant forms that can survive cooking; if food is cooled slowly or held warm, they can germinate and produce toxins. Rapid cooling and correct hot holding are therefore important controls.
Question 11Food safety hazards and contamination
A kitchen uses a colour-coded chopping board system. What is the main benefit?
- It reduces the chance of transferring bacteria between raw and ready-to-eat foods Correct answer.
- It makes boards easier to clean in a dishwasher
- It removes the need for hand washing between tasks
- It reduces the number of boards needed in the kitchen
Explanation
Colour coding provides a visible separation between raw and ready-to-eat preparation, lowering the risk of cross-contamination. It supports, but does not replace, cleaning and hand hygiene.
Question 12Food safety hazards and contamination
A food handler is diagnosed with typhoid fever. What is the correct action?
- Move them to a role serving customers only
- Allow them to work if they wear gloves
- Allow them to work if they have no visible symptoms
- Exclude them from food handling until a medical officer clears them Correct answer.
Explanation
Typhoid is a serious infectious disease that can be spread through food, so exclusion is required until medical clearance is given. This protects consumers and is a legal and managerial responsibility.
Question 13Food safety hazards and contamination
What does a pest sighting such as rodent droppings in a dry store indicate?
- Evidence that the store is too cold
- A failure of pest control that requires urgent action and investigation Correct answer.
- A sign that stock rotation is working
- A harmless issue that can be swept away without reporting
Explanation
Droppings show that pests have access to food storage, which is a contamination and disease risk. The area must be cleaned, affected stock discarded, and the entry point and control measures investigated.
Question 14Food safety hazards and contamination
Which situation is a chemical contamination risk?
- Keeping raw meat below cooked meat in the fridge
- Storing cleaning chemicals in unlabelled drinks bottles near food Correct answer.
- Cooling food rapidly in shallow containers
- Using a clean probe thermometer to check cooking temperatures
Explanation
Decanting chemicals into unlabelled food or drink containers creates a serious risk of accidental use in food. Chemicals must be kept in original labelled containers, stored away from food.
Question 15Food safety hazards and contamination
Why is it important to keep high-risk foods such as cooked meats under refrigeration?
- They support rapid bacterial growth and are eaten without further cooking Correct answer.
- They become harder to slice when warm
- They absorb moisture from the air
- They lose colour at room temperature
Explanation
High-risk foods are moist, protein-rich and ready to eat, so bacteria can multiply quickly and there is no later cooking step to kill them. Refrigeration keeps them out of the danger zone.
Question 16Food safety hazards and contamination
A cook reheats a portion of stew for hot holding. Which approach best controls bacterial risk?
- Reheat rapidly to at least 75°C and hold above 63°C Correct answer.
- Reheat to 60°C and hold for several hours
- Reheat gently to 50°C and hold there
- Reheat once, cool, then reheat again later
Explanation
Rapid reheating to at least 75°C ensures pathogens are destroyed, and holding above 63°C prevents survivors and spores from multiplying. Slow reheating or warm holding allows bacteria to grow.
Question 17Food safety hazards and contamination
What is the best reason for keeping dry food stores cool, dry and well ventilated?
- To discourage pests and limit mould growth Correct answer.
- To keep staff comfortable
- To increase the shelf life of cleaning products
- To make packaging easier to open
Explanation
Cool, dry, ventilated conditions discourage pests and reduce moisture that allows mould and bacterial spoilage. Stores should also be kept clean and organised.
Question 18Food safety hazards and contamination
A sandwich is prepared by a handler who then handles money at the till and returns to make another sandwich without washing hands. What is the main hazard created?
- Temperature abuse of the sandwich
- Chemical contamination from the till
- Physical contamination from coins
- Cross-contamination of ready-to-eat food from contaminated hands Correct answer.
Explanation
Hands pick up bacteria from money and contact surfaces and transfer them to ready-to-eat food that will not be cooked. Hand washing between tasks is essential to break this route.
Question 19Food safety hazards and contamination
Why are flying insects such as flies a particular concern in food areas?
- They consume large amounts of stored food
- They make the kitchen too warm
- They carry bacteria on their bodies and can land on exposed food Correct answer.
- They damage packaging materials
Explanation
Flies move between waste, dirt and food, carrying bacteria on their bodies and in their vomit and droppings. Screens, doors and waste management are used to keep them out.
Question 20Food safety hazards and contamination
Which of these best describes an allergen risk in catering?
- Allergens are destroyed by reheating
- Allergens only matter in packaged foods
- Allergens are only a concern for children
- A tiny amount of an allergen can cause a severe reaction in a sensitive person Correct answer.
Explanation
Allergic reactions can be triggered by trace amounts, so allergen information and separation from other ingredients are critical. Reheating does not remove allergenic proteins.
Question 21Food safety hazards and contamination
A food handler with a septic cut on the hand refuses to stop work. What is the most appropriate management action?
- Allow work if the cut is covered with a fabric plaster
- Allow work only with cold foods
- Exclude them from food handling until the wound is healed or properly protected Correct answer.
- Allow work only at the end of the shift
Explanation
Infected wounds can harbour pathogens such as Staphylococcus aureus that are easily transferred to food. Exclusion until healing, or suitable protection approved by management, is the safe course.
Question 22Food safety hazards and contamination
Two batches of cooked rice are held for service. Batch A is cooled in a shallow tray in a blast chiller and Batch B in a deep pot at room temperature. What is the key difference in risk?
- Batch B is safer because it cools slowly
- Batch A is more risky because it cools faster
- Batch B spends longer in the danger zone, allowing spore-formers to grow Correct answer.
- There is no difference because both are cooked
Explanation
Slow cooling keeps rice in the danger zone for longer, allowing Bacillus cereus spores to germinate and produce toxin. Rapid cooling in shallow containers or a blast chiller limits this risk.
Question 23Food safety hazards and contamination
A supplier delivers vacuum-packed chilled fish with a broken seal and a sour smell. What is the best analysis of the hazard?
- No hazard, because vacuum packing preserves food
- Likely a physical hazard only; accept and inspect
- Likely bacterial spoilage; reject the delivery and record it Correct answer.
- Likely a chemical hazard; accept and rinse
Explanation
A broken vacuum seal allows air and bacteria in, and the sour smell indicates spoilage, so the product is unsafe and should be rejected. The rejection should be documented for supplier monitoring.
Question 24Food safety hazards and contamination
A chef wants to use the same probe thermometer for raw chicken and then for a cooked sauce. What is the correct control?
- Use the probe only on the chicken
- Wipe the probe on a cloth between uses
- Rely on the sauce being hot to kill bacteria
- Clean and disinfect the probe between uses Correct answer.
Explanation
A probe used on raw meat can carry bacteria to ready-to-eat food, so it must be cleaned and disinfected between uses. Wiping alone does not remove contamination.
Question 25Food safety hazards and contamination
Which combination best describes how a food safety management system controls hazards?
- Rely on staff experience alone
- Focus only on cleaning schedules
- Check food only at the end of production
- Identify hazards, set critical limits and monitor them Correct answer.
Explanation
A documented system identifies significant hazards, sets controls and critical limits, and monitors them so action can be taken before unsafe food reaches consumers. Experience, end-point checks and cleaning alone are insufficient.
Question 26Food safety hazards and contamination
Which of the following is a biological hazard in food?
- Salmonella bacteria Correct answer.
- Cleaning chemical residue
- Glass fragment
- Metal shaving
Explanation
Biological hazards include microorganisms such as bacteria, viruses, parasites and moulds that can cause illness. Glass, chemicals and metal are physical and chemical hazards, not biological.
Question 27Food safety hazards and contamination
What is the most important reason for covering food during storage?
- To keep the food warm
- To save space in the fridge
- To prevent contamination from dust, pests and drips Correct answer.
- To improve the appearance
Explanation
Covering food creates a barrier against physical and biological contaminants such as dust, insects and drips from higher shelves. It does not reliably control temperature or save space.
Question 28Food safety hazards and contamination
Which of these is a common source of foodborne viruses?
- Infected food handlers Correct answer.
- Undercooked poultry
- Unpasteurised milk
- Raw vegetables
Explanation
Viruses such as norovirus are often spread by infected food handlers through poor hand hygiene. Undercooked poultry, raw vegetables and unpasteurised milk are more associated with bacterial hazards.
Question 29Food safety hazards and contamination
What is the main purpose of pest control in a food business?
- To reduce energy costs
- To improve the appearance of the premises
- To comply with fire regulations
- To prevent pests from contaminating food and surfaces Correct answer.
Explanation
Pests can carry pathogens and contaminate food, equipment and surfaces with droppings, hair and urine. Pest control aims to prevent this contamination and protect food safety.
Question 30Food safety hazards and contamination
Which of the following is a physical hazard that could enter food?
- Broken glass Correct answer.
- Bacteria
- Cleaning fluid
- Mould
Explanation
Physical hazards are hard or sharp objects that can cause injury, such as glass, metal or stones. Bacteria and mould are biological hazards, and cleaning fluid is a chemical hazard.
Question 31Food safety hazards and contamination
What is the correct way to store raw meat in a refrigerator?
- Next to cooked foods
- On the same shelf as cooked foods
- Above cooked foods
- Below cooked foods Correct answer.
Explanation
Raw meat should be stored below cooked or ready-to-eat foods to prevent juices from dripping and cross-contaminating them. Storing raw meat above or next to cooked foods increases the risk.
Question 32Food safety hazards and contamination
Which of these is a chemical hazard in food?
- Glass
- Norovirus
- Salmonella
- Pesticide residue Correct answer.
Explanation
Chemical hazards include substances such as pesticides, cleaning agents and allergens that can cause harm if present in food. Salmonella and norovirus are biological, and glass is physical.
Question 33Food safety hazards and contamination
Why should food handlers avoid wearing jewellery when preparing food?
- It can be lost easily
- It is uncomfortable
- It can harbour bacteria and cause physical contamination Correct answer.
- It may tarnish in water
Explanation
Jewellery can trap food and bacteria, making hands harder to clean, and small parts can fall into food as physical hazards. The main food safety concern is contamination.
Question 34Food safety hazards and contamination
A food handler is about to prepare a salad and notices a small cut on their finger. What should they do first?
- Ask another handler to do the task without telling them about the cut
- Continue but avoid touching the cut
- Cover the cut with a waterproof dressing and wear a glove Correct answer.
- Wash the cut with water only
Explanation
A waterproof dressing prevents blood and bacteria from entering food, and a glove adds a barrier. Simply avoiding the cut or washing with water alone does not provide adequate protection.
Question 35Food safety hazards and contamination
A kitchen has a pest problem with cockroaches. Which control measure is most effective?
- Leave food out to attract pests away from storage
- Use fly screens on windows only
- Seal cracks and gaps and maintain strict cleanliness Correct answer.
- Spray insecticide near food preparation areas
Explanation
Cockroaches thrive in cracks and crevices and are attracted by food debris. Sealing entry points and maintaining cleanliness removes their shelter and food source, which is more effective than reactive measures.
Question 36Food safety hazards and contamination
A food handler is diagnosed with a skin infection on their hand that is weeping. What is the correct action?
- Continue handling food with a waterproof dressing
- Report to the manager and be excluded from food handling Correct answer.
- Wear gloves and continue as normal
- Wash hands more frequently and continue
Explanation
Weeping skin infections can contaminate food with harmful bacteria, so the handler must report it and be excluded from food handling until cleared. A dressing or gloves alone may not prevent contamination.
Question 37Food safety hazards and contamination
A chef is using a knife to cut raw chicken and then wants to slice cooked ham. What is the best practice?
- Use a separate clean knife and board for the ham Correct answer.
- Rinse the knife under water and continue
- Wipe the knife with a cloth and continue
- Turn the knife over and continue
Explanation
Raw chicken can carry pathogens that must not be transferred to ready-to-eat ham. Using separate clean equipment prevents cross-contamination.
Question 38Food safety hazards and contamination
Which of the following is an example of cross-contamination?
- Chilling food rapidly
- Using the same unwashed board for raw and cooked foods Correct answer.
- Storing raw meat below cooked meat
- Cooking food to the correct temperature
Explanation
Cross-contamination occurs when harmful microorganisms are transferred from one food or surface to another. Using the same unwashed board for raw and cooked foods allows this transfer.
Question 39Food safety hazards and contamination
What is the main reason for keeping food out of the temperature danger zone?
- To save energy
- To keep food looking fresh
- To slow or stop bacterial growth Correct answer.
- To improve flavour
Explanation
Bacteria multiply most rapidly between 5°C and 63°C, so keeping food outside this range slows or stops their growth. Other factors like appearance or flavour are not the primary safety reason.
Question 40Food safety hazards and contamination
A food handler has been vomiting and has diarrhoea. When should they return to food handling duties?
- 24 hours after symptoms stop
- As soon as they feel better
- 48 hours after symptoms stop Correct answer.
- Immediately after taking medication
Explanation
Food handlers with vomiting or diarrhoea should be excluded from work until 48 hours after symptoms have stopped to reduce the risk of spreading infection. Returning sooner risks contaminating food.
Question 41Food safety hazards and contamination
Which of these is a high-risk food for bacterial growth?
- Whole raw potatoes
- Dried pasta
- Cooked rice Correct answer.
- Bread
Explanation
High-risk foods are moist, protein-rich and ready to eat, such as cooked rice, which can support the growth of Bacillus cereus if not cooled quickly. Dried pasta, raw potatoes and bread are low-risk.
Question 42Food safety hazards and contamination
A food business uses a colour-coded cleaning system. What is the main purpose of this system?
- To reduce cross-contamination between different areas Correct answer.
- To save money on cleaning products
- To comply with fire safety
- To make cleaning more colourful
Explanation
Colour-coded cleaning equipment helps prevent the spread of bacteria from one area (e.g., raw preparation) to another (e.g., ready-to-eat areas). It is a cross-contamination control measure.
Question 43Food safety hazards and contamination
What is the recommended temperature for a domestic refrigerator to keep food safe?
- Between 10°C and 15°C
- Between 8°C and 10°C
- Between 0°C and 5°C Correct answer.
- Below -18°C
Explanation
A refrigerator should be kept between 0°C and 5°C to slow bacterial growth. Temperatures above 5°C allow bacteria to multiply faster, and -18°C is for freezing, not chilling.
Question 44Food safety hazards and contamination
A caterer is preparing a buffet. Which practice best prevents contamination of the food on display?
- Using separate serving utensils for each dish Correct answer.
- Replenishing dishes by adding fresh food to old food
- Allowing guests to serve themselves with their own cutlery
- Leaving food uncovered for easy access
Explanation
Separate utensils prevent cross-contamination between dishes and from guests' hands. Self-service with personal cutlery, uncovered food, and topping up dishes all increase contamination risk.
Question 45Food safety hazards and contamination
Which of the following best describes a spore-forming bacterium's significance in food safety?
- Spores are a type of chemical hazard
- Spores make food taste better
- Spores allow bacteria to survive cooking and grow if food is cooled slowly Correct answer.
- Spores are killed easily by refrigeration
Explanation
Spores are heat-resistant forms of bacteria that can survive cooking and then germinate if food is cooled slowly or held warm, leading to food poisoning. They are not a chemical hazard and are not killed by refrigeration.
Question 46Food safety hazards and contamination
A food handler is wearing gloves while preparing sandwiches. They answer the phone and then return to sandwich preparation. What is the correct action?
- Wipe gloves on a cloth and continue
- Remove gloves and continue with bare hands
- Change gloves and wash hands before continuing Correct answer.
- Continue because gloves protect the food
Explanation
Gloves can become contaminated when touching items like phones, so they must be changed and hands washed before returning to food. Continuing with the same gloves risks transferring contamination.
Question 47Food safety hazards and contamination
A cook notices that a container of cleaning fluid has lost its label. What should they do?
- Store it with food ingredients
- Add water to dilute it
- Use it as it is probably safe
- Dispose of it safely or label it correctly if identity is known Correct answer.
Explanation
Unlabelled chemicals are a serious chemical hazard risk because they could be mistaken for food ingredients. They should be disposed of safely or, if the contents are known, correctly labelled.
Question 48Food safety hazards and contamination
Which of these best explains why food handlers should not smoke in food preparation areas?
- Smoke can transfer bacteria and ash to food Correct answer.
- Smoking is unhealthy for the handler only
- Smoke can improve flavour
- Smoking is allowed if hands are washed
Explanation
Smoking involves hand-to-mouth contact and can transfer saliva and bacteria to hands and then to food; ash is also a physical contaminant. The risk is to food safety, not just the handler's health.
Question 49Food safety hazards and contamination
A chef is cooling a large pot of stew. Which method best minimises bacterial growth?
- Leave in the pot at room temperature overnight
- Divide into shallow containers and refrigerate promptly Correct answer.
- Cover and leave on the counter to cool slowly
- Place the hot pot directly into the refrigerator
Explanation
Dividing into shallow containers increases surface area and allows rapid cooling, reducing the time spent in the danger zone. Leaving at room temperature or cooling slowly allows bacteria to multiply.
Question 50Food safety hazards and contamination
Which of the following best describes the role of a food safety management system based on HACCP principles?
- It is only required for large businesses
- It identifies, controls and monitors critical points in food handling Correct answer.
- It replaces the need for staff training
- It guarantees food will never cause illness
Explanation
A HACCP-based system systematically identifies hazards, establishes control measures and monitors critical control points to prevent food safety problems. It does not guarantee zero risk and requires staff training.