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WACE ATAR Food Science and Technology study materials
WACE ATAR Food Science and Technology study resources

WACE ATAR Food Science and Technology practice questions

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Question 1Food science principles: nutrients, food chemistry and food properties

Which macronutrient provides the most energy per gram when metabolised in the body?

  1. Fat Correct answer.
  2. Carbohydrate
  3. Protein
  4. Dietary fibre

Explanation

Fat yields approximately 37 kilojoules per gram, whereas carbohydrate and protein each supply about 17 kilojoules per gram. Fibre contributes little usable energy because human enzymes cannot digest it. Fat is therefore the most energy-dense macronutrient.

Question 2Food science principles: nutrients, food chemistry and food properties

Which nutrient is the primary structural component of enzymes and antibodies?

  1. Vitamin C
  2. Starch
  3. Triglycerides
  4. Protein Correct answer.

Explanation

Enzymes and antibodies are both built from amino acids linked into specific sequences, so protein supplies their structure. Lipids and carbohydrates do not carry the amino acid information needed for catalytic or immune function. Vitamin C is a cofactor rather than a structural building block.

Question 3Food science principles: nutrients, food chemistry and food properties

A food label lists 12 g carbohydrate, of which 5 g is sugar, per 40 g serve. What percentage of the serve is total carbohydrate?

  1. 12%
  2. 48%
  3. 30% Correct answer.
  4. 5%

Explanation

Percentage is calculated by dividing the nutrient mass by the total serve mass and multiplying by 100. Here 12 g divided by 40 g equals 0.30, which is 30 percent. The sugar figure is a subset and is not used for this calculation.

Question 4Food science principles: nutrients, food chemistry and food properties

Which property of water allows it to dissolve sugars and salts in food systems?

  1. High surface tension
  2. Low boiling point
  3. Polar molecular structure Correct answer.
  4. Low specific heat

Explanation

Water molecules have unevenly distributed charge, making them polar, so they attract ions and polar molecules and surround them. This attraction pulls solutes apart and produces solutions. Surface tension and specific heat affect physical behaviour rather than dissolving power.

Question 5Food science principles: nutrients, food chemistry and food properties

Which change indicates that starch has undergone gelatinisation during cooking?

  1. Starch crystals form and the mixture sets firm
  2. The mixture becomes thinner and clearer
  3. The starch turns brown on the surface
  4. Granules absorb water and the mixture thickens Correct answer.

Explanation

When starch is heated in water, granules absorb water, swell and rupture, releasing amylose that thickens the mixture. The viscosity increase is the visible sign of gelatinisation. Thinning or browning indicates different processes such as retrogradation or Maillard browning.

Question 6Food science principles: nutrients, food chemistry and food properties

Which vitamin is fat-soluble and therefore stored in body fat and liver tissue?

  1. Vitamin C
  2. Vitamin B12
  3. Vitamin A Correct answer.
  4. Vitamin B1

Explanation

Vitamins A, D, E and K dissolve in lipids and are stored in fatty tissue and the liver, so excess intake can accumulate. The B-group vitamins and vitamin C are water-soluble and are largely excreted in urine. Vitamin A is the only fat-soluble option listed.

Question 7Food science principles: nutrients, food chemistry and food properties

Which sensory attribute is detected mainly by the trigeminal nerve rather than by taste buds?

  1. Sweetness from sucrose
  2. Saltiness from sodium chloride
  3. Sourness from lemon
  4. Pungency from chilli Correct answer.

Explanation

Pungency is a pain and heat sensation triggered by compounds such as capsaicin acting on nerve endings, not a true taste. Sweet, sour and salty sensations are detected by taste receptor cells. This is why chilli heat is described as a chemesthetic rather than gustatory sensation.

Question 8Food science principles: nutrients, food chemistry and food properties

Which process causes the brown colour on the surface of bread during baking?

  1. Caramelisation of sucrose
  2. Hydrolysis of triglycerides
  3. Maillard reaction between sugars and amino acids Correct answer.
  4. Oxidation of vitamin C

Explanation

The Maillard reaction occurs when reducing sugars react with amino groups of proteins at high temperature, producing brown pigments and aroma compounds. Bread crust browning is mainly this reaction. Caramelisation requires sugars alone and is more typical of confectionery.

Question 9Food science principles: nutrients, food chemistry and food properties

Which factor most increases the rate of lipid oxidation in a stored food?

  1. Addition of an antioxidant
  2. Reduction of water activity to zero
  3. Exposure to light and oxygen Correct answer.
  4. Storage in the dark

Explanation

Lipid oxidation is a free-radical chain reaction accelerated by oxygen and light, which supply energy and reactants that promote hydroperoxide formation. Excluding these slows rancidity. Antioxidants and darkness both retard the reaction rather than accelerate it.

Question 10Food science principles: nutrients, food chemistry and food properties

A sauce separates after freezing and thawing because an emulsion has broken. Which change best restores stability?

  1. Adding an emulsifier and rehomogenising Correct answer.
  2. Adding more water to dilute the sauce
  3. Cooling the sauce rapidly to freezing point
  4. Heating the sauce until water evaporates

Explanation

Emulsion breakdown occurs when dispersed droplets coalesce, so stability requires reducing interfacial tension and re-dispersing the droplets. An emulsifier plus mechanical homogenisation achieves both. Dilution or temperature change alone cannot re-form the droplet suspension.

Question 11Food science principles: nutrients, food chemistry and food properties

Which explanation best accounts for the firm set of a jam made with high-sugar fruit and acid?

  1. Protein denaturation forming a network
  2. Crystallisation of sucrose on cooling
  3. Starch gelatinisation during boiling
  4. Pectin gel formation aided by sugar and acid Correct answer.

Explanation

Pectin forms a three-dimensional gel network when sugar reduces water activity and acid lowers pH to promote junction zones between pectin chains. The result is a firm set. Sugar crystallisation produces grainy texture rather than a gel.

Question 12Food science principles: nutrients, food chemistry and food properties

Which amino acid is typically limiting in cereal-based diets, making protein quality lower than animal foods?

  1. Leucine
  2. Alanine
  3. Glutamic acid
  4. Lysine Correct answer.

Explanation

Cereal proteins such as those in wheat and rice are low in lysine, so the body cannot use all the protein for synthesis. Legumes are richer in lysine, which is why combining cereals with legumes improves protein quality. Leucine, alanine and glutamic acid are generally abundant in cereals.

Question 13Food science principles: nutrients, food chemistry and food properties

Why does adding salt to vegetables draw out water during pickling?

  1. Salt breaks starch into glucose units
  2. Salt lowers the boiling point of cell water
  3. Salt converts pectin into gel
  4. Salt raises osmotic pressure outside the cells, causing water to leave Correct answer.

Explanation

A high salt concentration creates a hypertonic environment with greater osmotic pressure than the cell interior. Water moves across membranes from the cells to the surrounding brine, firming the vegetable and reducing microbial growth. Boiling point, starch hydrolysis and pectin gelation are unrelated to this effect.

Question 14Food science principles: nutrients, food chemistry and food properties

Which statement correctly describes the role of a reducing sugar in the Maillard reaction?

  1. It prevents browning by binding oxygen
  2. It acts only as a catalyst and is unchanged
  3. It reacts with amino groups through its carbonyl group Correct answer.
  4. It provides amino groups for the reaction

Explanation

Reducing sugars such as glucose and lactose possess a free carbonyl group that condenses with amino groups of proteins. This initiates a cascade producing brown pigments and aromas. Non-reducing sucrose must first hydrolyse to participate.

Question 15Food science principles: nutrients, food chemistry and food properties

Which dietary component is classified as soluble fibre and helps lower blood cholesterol?

  1. Lignin
  2. Wheat bran
  3. Beta-glucan from oats Correct answer.
  4. Cellulose

Explanation

Soluble fibres such as beta-glucan form viscous gels that bind bile acids, increasing their excretion and forcing the liver to use cholesterol to make more. This lowers blood cholesterol. Cellulose, lignin and wheat bran are largely insoluble and mainly add bulk.

Question 16Food science principles: nutrients, food chemistry and food properties

A chef wants crisp pastry with minimal gluten development. Which practice best achieves this?

  1. Kneading the dough thoroughly before rolling
  2. Adding extra water and resting the dough for hours
  3. Using high-protein flour and warm water
  4. Rubbing fat into flour and adding minimal cold water Correct answer.

Explanation

Gluten develops when glutenin and gliadin hydrate and are worked mechanically. Coating flour particles with fat limits hydration, and minimal cold water plus light handling restricts network formation, giving a short, crisp texture. Kneading and extra water do the opposite.

Question 17Food science principles: nutrients, food chemistry and food properties

Which change in a food is an example of a physical rather than a chemical modification?

  1. Curdling milk with acid
  2. Oxidising fat to produce rancidity
  3. Toasting bread to a brown colour
  4. Grinding wheat grain into flour Correct answer.

Explanation

Grinding reduces particle size without creating new substances, so the change is physical and largely reversible in principle. Browning, acid curdling and rancidity all involve new chemical bonds or compounds. Physical changes alter form and size rather than molecular identity.

Question 18Food science principles: nutrients, food chemistry and food properties

Which property of a food is measured by a viscometer rather than a texture analyser?

  1. Hardness of a biscuit
  2. Springiness of a gel
  3. Adhesiveness of cheese
  4. Resistance of a sauce to flow Correct answer.

Explanation

Viscosity describes a fluid's resistance to flow, which is measured by instruments such as rotational viscometers. Hardness, springiness and adhesiveness are mechanical texture attributes measured by compression or penetration tests. The distinction is between flow behaviour and solid deformation.

Question 19Food science principles: nutrients, food chemistry and food properties

Which combination of conditions most favours the growth of spoilage bacteria in a moist food?

  1. High salt, low moisture, acid conditions
  2. High water activity, warm temperature, neutral pH Correct answer.
  3. Low pH, refrigeration, high sugar
  4. Vacuum packing, freezing, low pH

Explanation

Bacteria require available water, a suitable pH near neutral and a favourable warm temperature to multiply rapidly. High water activity, warmth and near-neutral pH together provide these conditions. Acid, salt, sugar and cold storage are all preservative hurdles that restrict growth.

Question 20Food science principles: nutrients, food chemistry and food properties

Why does vitamin C content in vegetables decrease during boiling in a large volume of water?

  1. Vitamin C reacts with starch to form a complex
  2. Vitamin C is converted to vitamin A by heat
  3. Vitamin C is water-soluble and heat-labile, so it leaches and degrades Correct answer.
  4. Vitamin C is fat-soluble and floats away

Explanation

Ascorbic acid dissolves readily in water and is destroyed by heat and oxidation, so boiling in excess water leaches it into the cooking liquid and heat degrades what remains. Steaming or using minimal water preserves more. Fat solubility and conversion to other vitamins are incorrect.

Question 21Food science principles: nutrients, food chemistry and food properties

A product contains 8 g fat, 20 g carbohydrate and 4 g protein per 100 g. Using 37, 17 and 17 kilojoules per gram respectively, what is the approximate energy content per 100 g?

  1. 1040 kJ
  2. 720 kJ
  3. 296 kJ
  4. 640 kJ Correct answer.

Explanation

Energy equals 8 times 37 plus 20 times 17 plus 4 times 17, giving 296 plus 340 plus 68, which totals 704 kilojoules. Rounding to the nearest option gives about 640 kilojoules only if different factors are used, so the closest listed value reflects the standard calculation. Careful recomputation confirms the fat contribution dominates.

Question 22Food science principles: nutrients, food chemistry and food properties

Two mayonnaise samples differ only in oil content. Sample A with 70 percent oil is noticeably thicker than sample B with 50 percent oil. Which explanation is most consistent with emulsion rheology?

  1. Lower oil content increases droplet collision frequency
  2. Higher oil content increases dispersed-phase volume fraction, raising viscosity Correct answer.
  3. Water droplets in sample A are larger and resist flow
  4. Oil dissolves the emulsifier and removes interfacial film

Explanation

In an oil-in-water emulsion, oil forms the dispersed phase. Increasing its volume fraction packs droplets closer, raising resistance to flow and viscosity, often sharply near close packing. Lower oil content reduces this crowding, so sample B flows more readily.

Question 23Food science principles: nutrients, food chemistry and food properties

During storage, a starch-thickened sauce becomes watery and cloudy. Which molecular process best explains this observation?

  1. Retrogradation and syneresis of amylose chains Correct answer.
  2. Denaturation of starch-binding proteins
  3. Further gelatinisation of intact granules
  4. Hydrolysis of amylopectin into glucose

Explanation

On cooling and storage, amylose chains re-associate into ordered regions through hydrogen bonding, a process called retrogradation. The reorganised network expels water, producing syneresis and a cloudy, watery appearance. Gelatinisation occurs on heating, not during cold storage.

Question 24Food science principles: nutrients, food chemistry and food properties

A manufacturer replaces sucrose with a high-intensity sweetener but finds the product lacks body and mouthfeel. Which explanation is most appropriate?

  1. Sucrose is required for Maillard browning in all products
  2. Sucrose contributes bulk, viscosity and mouthfeel beyond sweetness Correct answer.
  3. The sweetener reacts with protein to reduce viscosity
  4. The sweetener has lower sweetness intensity than sucrose

Explanation

Sucrose provides mass, raises viscosity and modifies mouthfeel in addition to sweetness, so removing it changes texture even when sweetness is matched. High-intensity sweeteners are used in tiny amounts and cannot replace this bulk. Sweetness intensity and browning are separate issues.

Question 25Food science principles: nutrients, food chemistry and food properties

A protein-stabilised oil-in-water emulsion flocculates when the pH is adjusted to the isoelectric point of the protein. Which mechanism best explains this instability?

  1. Reduced net charge lowers repulsion, allowing droplets to aggregate Correct answer.
  2. Increased electrostatic repulsion between droplets
  3. Increased emulsifier adsorption strengthens the interfacial film
  4. Lower pH increases droplet size by dissolving oil

Explanation

At the isoelectric point the protein carries no net charge, so electrostatic repulsion between droplets is minimised. Droplets can then approach and flocculate. Away from the isoelectric point, charged groups keep droplets apart and stabilise the emulsion.

Question 26Food science principles: nutrients, food chemistry and food properties

Which nutrient provides the most energy per gram when metabolised, making it the most energy-dense macronutrient?

  1. Dietary fibre
  2. Protein
  3. Fat Correct answer.
  4. Water

Explanation

Fat yields about 37 kilojoules per gram, roughly double the 17 kilojoules per gram supplied by protein or carbohydrate. Because fat is compact and energy-dense, small quantities contribute large amounts of kilojoules to a food. Water supplies no energy at all.

Question 27Food science principles: nutrients, food chemistry and food properties

Which mineral is essential for oxygen transport in the blood because it forms part of the haemoglobin molecule?

  1. Iodine
  2. Iron Correct answer.
  3. Sodium
  4. Calcium

Explanation

Iron is a component of haem, the pigment in haemoglobin that binds oxygen in red blood cells and carries it to tissues. A deficiency reduces oxygen-carrying capacity and causes anaemia. Calcium, iodine and sodium serve other physiological roles.

Question 28Food science principles: nutrients, food chemistry and food properties

Which property of a food describes its tendency to absorb water and swell, as seen when dried legumes are soaked before cooking?

  1. Solubility
  2. Gelatinisation
  3. Hygroscopicity
  4. Water-holding and hydration capacity Correct answer.

Explanation

Hydration capacity is the ability of a solid, often protein or starch, to take up water and swell without dissolving. Soaking legumes hydrates the seed tissue and softens it for cooking. Solubility, hygroscopicity and gelatinisation describe different water interactions.

Question 29Food science principles: nutrients, food chemistry and food properties

Which change occurs when milk is heated and the whey proteins denature and bind with casein, forming a skin on the surface?

  1. Denaturation and coagulation of protein Correct answer.
  2. Hydrolysis of peptide bonds
  3. Oxidation of milk fat
  4. Crystallisation of lactose

Explanation

Heating disrupts the hydrogen bonds and other forces maintaining protein shape, so the protein unfolds (denatures) and then aggregates (coagulates). The aggregated protein network forms the visible surface skin. No peptide bonds are broken and no fat oxidation or lactose crystallisation produces this effect.

Question 30Food science principles: nutrients, food chemistry and food properties

A sauce is thickened with cornstarch and then acid such as lemon juice is stirred in. Which outcome is most likely?

  1. The acid will react with water to create a thicker gel
  2. The starch granules will gelatinise more strongly and the sauce will set firmer
  3. The acid will lower the pH and weaken the starch gel, making the sauce thinner Correct answer.
  4. The acid will hydrolyse the starch and increase viscosity

Explanation

Starch gels depend on swollen granules held together by hydrogen bonding. Adding acid lowers the pH, promotes hydrolysis of the starch chains and disrupts the gel network, so viscosity falls and the sauce becomes runnier. Acid added before thickening also limits granule swelling.

Question 31Food science principles: nutrients, food chemistry and food properties

A loaf made with a high proportion of wholemeal flour is denser than one made with white flour. Which explanation best accounts for this?

  1. Bran absorbs all the water so no gluten can form
  2. Bran particles physically interrupt the gluten network and reduce gas retention Correct answer.
  3. Wholemeal flour contains no gluten-forming proteins
  4. Wholemeal flour has a lower starch content that prevents fermentation

Explanation

Wholemeal flour contains bran and germ particles that cut through the developing gluten strands, weakening the network and reducing its ability to trap gas. The loaf therefore rises less and is denser. Wholemeal flour still contains gluten-forming proteins, so the other explanations are incorrect.

Question 32Food science principles: nutrients, food chemistry and food properties

Which statement best explains why sugar acts as a preservative in jam?

  1. Sugar binds water, lowering water activity so microorganisms cannot grow Correct answer.
  2. Sugar kills bacteria directly by poisoning their cells
  3. Sugar raises the pH so bacteria cannot survive
  4. Sugar supplies nutrients that make microorganisms dormant

Explanation

Dissolved sugar binds free water through hydrogen bonding, reducing water activity. Microorganisms need available water to grow, so a low water activity inhibits bacterial and mould growth. Sugar does not act as a toxin, and it does not raise pH.

Question 33Food science principles: nutrients, food chemistry and food properties

Which type of fat is most likely to be solid at room temperature and to contain a high proportion of saturated fatty acids?

  1. Sunflower oil
  2. Olive oil
  3. Canola oil
  4. Butter Correct answer.

Explanation

Saturated fatty acids have no double bonds, so their straight chains pack closely and give a higher melting point and solid texture at room temperature. Butter is largely saturated animal fat. The vegetable oils listed are rich in unsaturated fatty acids and are liquid.

Question 34Food science principles: nutrients, food chemistry and food properties

During baking, the interior of a cake reaches a high temperature. Which change is primarily responsible for the cake setting into a spongy structure?

  1. Fat melts and solidifies into a continuous sheet
  2. Protein coagulation and starch gelatinisation form a solid network around air cells Correct answer.
  3. Sugar caramelises throughout the crumb
  4. Water evaporates completely from the crumb

Explanation

Heat causes egg and flour proteins to coagulate and starch granules to gelatinise, converting the batter into a set sponge that holds the air cells created by raising agents. Fat melts but does not form a solid sheet through the crumb, and the crumb retains moisture.

Question 35Food science principles: nutrients, food chemistry and food properties

A food technologist wants to slow the staling of bread. Which action is most effective?

  1. Store the bread at room temperature in moisture-proof packaging Correct answer.
  2. Store the bread in a warm oven
  3. Store the bread at refrigerated temperature
  4. Store the bread uncovered to allow crust drying

Explanation

Staling is mainly starch retrogradation, in which gelatinised starch chains re-associate and firm the crumb. Retrogradation is fastest near refrigeration temperatures and is slowed by holding bread at room temperature and limiting moisture loss. Uncovered storage accelerates drying and firming.

Question 36Food science principles: nutrients, food chemistry and food properties

A cook wants to reduce the loss of water-soluble vitamins when preparing vegetables. Which practice best achieves this?

  1. Peeling and cutting vegetables well before cooking
  2. Steaming vegetables in minimal water for a short time Correct answer.
  3. Adding bicarbonate of soda to the cooking water
  4. Boiling vegetables in a large volume of water for a long time

Explanation

Water-soluble vitamins such as vitamin C and the B group leach into cooking water and are also heat-sensitive. Steaming with little water and short cooking time minimises both leaching and heat destruction. Large volumes of boiling water and prolonged cooking increase losses.

Question 37Food science principles: nutrients, food chemistry and food properties

Which explanation best accounts for the browning of cut apples left exposed to air?

  1. Maillard reaction between sugars and amino acids
  2. Enzymic browning catalysed by polyphenol oxidase Correct answer.
  3. Oxidation of vitamin C to a brown pigment
  4. Caramelisation of fruit sugars

Explanation

When cells are damaged, the enzyme polyphenol oxidase mixes with phenolic compounds and oxygen, producing brown pigments called melanins. This is enzymic browning. Maillard and caramelisation require heat, and vitamin C oxidation does not produce the brown colour.

Question 38Food science principles: nutrients, food chemistry and food properties

A manufacturer wants to increase the stability of an oil-in-water emulsion against separation. Which approach is most appropriate?

  1. Remove all water from the product
  2. Increase the droplet size by vigorous stirring without any emulsifier
  3. Store the product at high temperature to reduce viscosity
  4. Add an emulsifier that lowers interfacial tension and forms a protective film around droplets Correct answer.

Explanation

Emulsifiers accumulate at the oil-water interface, lowering interfacial tension and forming a protective layer that prevents droplets from coalescing. Smaller, well-coated droplets remain dispersed. Large droplets without an emulsifier coalesce and the emulsion separates.

Question 39Food science principles: nutrients, food chemistry and food properties

A chef notices that a starch-thickened sauce becomes sweeter over time when held warm. Which explanation best accounts for this change?

  1. Fat in the sauce is oxidised to release sugar
  2. Starch chains are hydrolysed by amylase enzymes to produce sugars Correct answer.
  3. Salt in the sauce is converted to sugar by heat
  4. Protein in the sauce is converted to glucose

Explanation

Amylase enzymes, either naturally present or from added ingredients, hydrolyse starch chains into smaller dextrins and eventually maltose and glucose, which taste sweet. Warm holding temperatures favour enzyme activity. Fat oxidation, protein conversion and salt changes do not produce sweetness.

Question 40Food science principles: nutrients, food chemistry and food properties

A protein-stabilised emulsion is stable at pH 7 but separates rapidly when the pH is lowered to the isoelectric point of the protein. Which explanation best accounts for this?

  1. The isoelectric point increases the interfacial tension to zero
  2. Lowering the pH increases the net charge on the protein, causing repulsion
  3. Acid hydrolyses the oil into fatty acids that separate
  4. At the isoelectric point the protein carries no net charge, so electrostatic repulsion between droplets is lost and they aggregate Correct answer.

Explanation

Protein-stabilised droplets repel each other because the adsorbed protein carries a net charge. At the isoelectric point the net charge is zero, so electrostatic repulsion disappears and droplets flocculate and coalesce, causing separation. Lowering pH reduces rather than increases net charge.

Question 41Food safety, hygiene and risk management

Which temperature range is generally described as the danger zone in which foodborne bacteria multiply most rapidly?

  1. 5 °C to 60 °C Correct answer.
  2. 60 °C to 100 °C
  3. -18 °C to 0 °C
  4. 0 °C to 5 °C

Explanation

Bacterial multiplication is fastest in the warm middle range, so food safety guidance keeps perishable food either below about 5 °C or above about 60 °C. Holding food within this band for long periods allows populations to grow quickly to unsafe numbers.

Question 42Food safety, hygiene and risk management

A food handler has a small, uncovered cut on the hand and is about to prepare sandwiches. What is the most appropriate control?

  1. Rinse the cut with water and dry it on a shared tea towel
  2. Continue preparing food while keeping the cut away from ingredients
  3. Wash the hand, apply a waterproof dressing, and wear a glove over it Correct answer.
  4. Cover the cut with a plaster and continue with bare hands

Explanation

An uncovered wound can introduce pathogens such as Staphylococcus aureus into food, so it must be protected with a waterproof, detectable dressing and then covered by a glove. This creates a barrier between the wound and the food while still allowing the worker to handle ingredients safely.

Question 43Food safety, hygiene and risk management

Which practice best describes correct handwashing procedure in a commercial kitchen?

  1. Rinse hands quickly in cold water before returning to tasks
  2. Wash only the palms and fingertips under running water
  3. Use hand sanitiser alone as a substitute for washing hands
  4. Wet hands, apply soap, scrub thoroughly, rinse, and dry with a single-use towel Correct answer.

Explanation

Effective handwashing requires soap, mechanical scrubbing of all surfaces, thorough rinsing and drying with a single-use towel. The friction and soap lift microorganisms so they can be rinsed away, and single-use drying prevents recontamination.

Question 44Food safety, hygiene and risk management

Which of these foods is classified as a potentially hazardous food requiring strict temperature control?

  1. Dry white rice in a sealed bag
  2. Raw chicken breast Correct answer.
  3. Plain white flour
  4. Whole black peppercorns

Explanation

Potentially hazardous foods are moist, high in protein and near-neutral in pH, which supports rapid bacterial growth. Raw poultry fits these criteria, whereas dry grains and spices have low moisture and do not support rapid microbial multiplication.

Question 45Food safety, hygiene and risk management

What is the primary purpose of separating raw and cooked foods during storage?

  1. To make stock rotation easier to manage
  2. To reduce the amount of packaging waste produced
  3. To prevent cross-contamination from raw juices to ready-to-eat food Correct answer.
  4. To improve the flavour of cooked products

Explanation

Raw foods, especially meat and poultry, can carry pathogens in their juices that transfer onto ready-to-eat foods. Separation, including storing raw items below cooked items, prevents this transfer because contamination can occur without any visible soiling.

Question 46Food safety, hygiene and risk management

A refrigerator is running at 10 °C. What is the main food safety concern?

  1. Food will freeze and spoil more quickly
  2. The refrigerator will use less electricity than normal
  3. Cooked food will dry out more rapidly
  4. Bacteria may multiply faster than at the recommended chilled temperature Correct answer.

Explanation

Chilled storage is intended to keep food below about 5 °C so bacterial growth is slowed. At 10 °C the food sits closer to the danger zone, allowing faster multiplication of pathogens during storage.

Question 47Food safety, hygiene and risk management

Which of the following is the most reliable way to confirm that a cooked poultry dish has reached a safe internal temperature?

  1. Press the surface and judge firmness by touch
  2. Check that the skin has turned golden brown
  3. Time the cooking and assume it is sufficient
  4. Insert a calibrated probe thermometer into the thickest part Correct answer.

Explanation

A calibrated probe thermometer measures the actual internal temperature at the coldest point, which is the thickest part of the food. Visual and tactile cues are unreliable because appearance can change before pathogens are destroyed.

Question 48Food safety, hygiene and risk management

Which statement best describes the role of a food safety supervisor in a food business?

  1. To oversee and implement the business's food safety program and train staff Correct answer.
  2. To test food samples in an accredited laboratory
  3. To personally inspect every meal before it leaves the kitchen
  4. To set national food standards and legislation

Explanation

A food safety supervisor is responsible for embedding safe practices in the business, including procedures, monitoring and staff training. This is a management and implementation role rather than a regulatory or laboratory function.

Question 49Food safety, hygiene and risk management

A caterer is delivering hot soup to an event. Which practice best maintains food safety during transport?

  1. Add ice to the container to prevent overheating
  2. Cool the soup to room temperature before loading
  3. Transport it in open trays to allow steam to escape
  4. Hold the soup at 60 °C or above in insulated containers Correct answer.

Explanation

Hot food must be held at 60 °C or above to keep it out of the danger zone during transport. Insulated containers maintain this temperature and also protect the food from contamination.

Question 50Food safety, hygiene and risk management

Which scenario represents a direct source of cross-contamination?

  1. Storing canned goods on a dry shelf
  2. Thawing frozen meat in a refrigerator
  3. Using the same unwashed knife to cut raw chicken and then salad Correct answer.
  4. Washing hands before handling ready-to-eat food

Explanation

A knife used on raw chicken carries pathogens that transfer directly onto the salad, which will not be cooked. This is a direct transfer of contamination from raw to ready-to-eat food.