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IICCT Chocolate Taster study materials
IICCT Chocolate Taster study resources

IICCT Chocolate Taster practice questions

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Question 1Cacao botany, varieties and origins

Which botanical species is most widely cultivated for fine-flavour chocolate and is often described as producing 'Criollo-type' beans?

  1. Herrania umbratica
  2. Theobroma grandiflorum
  3. Theobroma cacao subsp. cacao Correct answer.
  4. Theobroma bicolor

Explanation

Theobroma cacao is the species from which chocolate is made, and the fine-flavour Criollo group belongs to the subspecies cacao (historically also called T. cacao subsp. cacao). The other listed genera and species are relatives in the Malvaceae family but are not the commercial chocolate species.

Question 2Cacao botany, varieties and origins

A grower describes a tree as 'Trinitario'. What does this term most accurately refer to?

  1. A grade of dried bean based on moisture content
  2. A fermentation method named after a port
  3. A hybrid population derived from Criollo and Forastero parentage Correct answer.
  4. A distinct wild species found only in Trinidad

Explanation

Trinitario is conventionally understood as a hybrid group arising from crosses between Criollo and Forastero types, historically associated with Trinidad. It is a genetic population category, not a species, a processing method, or a bean grade.

Question 3Cacao botany, varieties and origins

Which region is most strongly associated with the original centre of diversity of Theobroma cacao in the upper Amazon basin?

  1. The island of Java
  2. The upper Amazon region of present-day Peru, Ecuador and Colombia Correct answer.
  3. The Atlantic coastal forest of Brazil
  4. The Guiana Shield and Orinoco delta

Explanation

The primary centre of diversity for Theobroma cacao is generally placed in the upper Amazon basin, encompassing parts of Peru, Ecuador and Colombia. Other South American areas host cacao populations, but the deepest genetic diversity is associated with the upper Amazon.

Question 4Cacao botany, varieties and origins

Which statement best describes the term 'fine flavour' as applied to cacao?

  1. A measure of the bean's fat content
  2. A synonym for organically certified cacao
  3. A quality classification reflecting genetic background and sensory profile Correct answer.
  4. A legal designation granted only to beans grown above 500 metres

Explanation

Fine flavour is a quality classification based largely on genetic origin and the resulting sensory characteristics of the beans. It is not tied to a fixed altitude threshold, fat content, or organic certification.

Question 5Cacao botany, varieties and origins

Which pod characteristic is most typical of Criollo-type cacao?

  1. A pod that splits open spontaneously at maturity
  2. A pod covered in dense, stiff hairs
  3. A short, rounded pod with a pointed tip and relatively smooth surface Correct answer.
  4. A long, pointed pod with deep ridges and a rough, warty surface

Explanation

Criollo pods are often described as relatively smooth, rounded and pointed at the tip, sometimes with a distinct bottleneck shape. Deep ridges and a warty surface are more characteristic of many Forastero types.

Question 6Cacao botany, varieties and origins

In cacao botany, what is the 'cherello' (or 'cherelle')?

  1. The white pulp surrounding the beans
  2. A small, undeveloped pod that fails to mature Correct answer.
  3. The woody central core of the pod
  4. The small cushion on the trunk where flowers form

Explanation

A cherello is a young or undeveloped pod that aborts or fails to reach maturity, and such losses are common on cacao trees. It is not the pod's central core, the pulp, nor the flower cushion.

Question 7Cacao botany, varieties and origins

A taster notes that a sample has a strong, persistent bitterness and astringency with little fruit character. Which cacao type is most likely to produce this profile?

  1. A well-fermented Criollo
  2. A Nacional bean from Ecuador
  3. A bulk Forastero with incomplete fermentation Correct answer.
  4. A Trinitario harvested at peak ripeness

Explanation

Bulk Forastero beans, especially when fermentation is incomplete, tend to retain high levels of bitter and astringent compounds and show limited fruity complexity. Criollo, well-prepared Trinitario and Nacional are more often associated with finer, fruitier profiles.

Question 8Cacao botany, varieties and origins

Why is the genetic identity of a cacao tree often difficult to determine from pod appearance alone?

  1. Pod colour changes with every harvest
  2. Pod shape is determined entirely by fermentation
  3. Morphological traits overlap and are influenced by environment and hybridisation Correct answer.
  4. Pods are too small to examine

Explanation

Pod morphology varies within and between cacao groups, and environmental conditions and hybridisation blur the distinctions. This is why morphological identification is unreliable and molecular or provenance evidence is often needed.

Question 9Cacao botany, varieties and origins

Which of the following best explains why Nacional cacao from Ecuador is often treated as a distinct flavour category?

  1. It is a species separate from Theobroma cacao
  2. It is the only cacao that ferments without yeast
  3. It is grown at sea level, which concentrates sugars
  4. It has historically shown distinctive floral and fruity sensory notes Correct answer.

Explanation

Nacional has long been recognised for its characteristic floral and fruity sensory profile, which distinguishes it in the trade. It is a population within Theobroma cacao, and its distinctiveness is not explained by a separate species status or an unusual fermentation microbiology.

Question 10Cacao botany, varieties and origins

A buyer receives beans labelled 'Arriba Nacional'. What does 'Arriba' most commonly refer to in this context?

  1. A fermentation style using raised beds
  2. A grade based on bean count per 100 grams
  3. A method of drying beans on rooftops
  4. A traditional name associated with Ecuadorian cacao from the Guayas region Correct answer.

Explanation

'Arriba' is a traditional designation associated with Ecuadorian cacao, particularly from the Guayas region, and is often linked to the Nacional population. It is not a fermentation style, a bean-count grade, or a drying method.

Question 11Cacao botany, varieties and origins

Which factor most directly links cacao genetics to the flavour of the finished chocolate?

  1. The profile of precursor compounds in the bean that fermentation and roasting transform Correct answer.
  2. The height of the tree's canopy
  3. The number of seeds per pod
  4. The colour of the tree's leaves

Explanation

Genetic background shapes the storage proteins and polyphenol profile that fermentation and roasting convert into flavour precursors. Leaf colour, canopy height and seed count do not directly determine the sensory outcome.

Question 12Cacao botany, varieties and origins

Which cacao group is generally considered to have arisen in the Amazon basin and to include most of the world's bulk production?

  1. Trinitario
  2. Nacional
  3. Criollo
  4. Forastero Correct answer.

Explanation

Forastero is the large, genetically diverse Amazonian group that supplies most of the world's bulk cacao. Criollo is the classic fine-flavour group, Trinitario is a hybrid population, and Nacional is a regional population in Ecuador.

Question 13Cacao botany, varieties and origins

A plantation is described as growing 'Amazonian Forastero'. Which statement is most consistent with that description?

  1. The trees belong to a genetically diverse group native to the Amazon basin Correct answer.
  2. The trees produce pods with no seeds
  3. The trees are a single clonal variety grown worldwide
  4. The trees are a species of Herrania

Explanation

Amazonian Forastero refers to the diverse Forastero group associated with the Amazon basin. It is not a single clone, does not describe sterile trees, and is not a Herrania species.

Question 14Cacao botany, varieties and origins

Which statement about the relationship between Criollo and Forastero is botanically accurate?

  1. Forastero is a dried form of Criollo
  2. They are separate species that cannot cross
  3. Criollo is a fermented form of Forastero
  4. They are distinct genetic groups within Theobroma cacao that can interbreed Correct answer.

Explanation

Criollo and Forastero are recognised as distinct genetic groups within Theobroma cacao and are capable of interbreeding, which is how hybrid populations such as Trinitario arose. They are not separate species, nor are they processing forms of one another.

Question 15Cacao botany, varieties and origins

A taster is told a sample comes from a 'fine flavour' origin but detects harsh astringency. Which explanation is most plausible?

  1. The taster must be mistaken
  2. Astringency proves the beans are Forastero
  3. Fine-flavour cacao cannot become astringent
  4. The beans were harvested from a fine-flavour tree but poorly fermented Correct answer.

Explanation

Genetic potential sets a ceiling on quality, but poor fermentation or drying can leave excessive astringency even in fine-flavour cacao. Astringency therefore does not by itself prove the genetic group, and dismissing the taster's observation is not a sound explanation.

Question 16Cacao botany, varieties and origins

Which feature is most useful for distinguishing a Criollo pod from a typical Forastero pod in the field?

  1. The presence of a pointed tip and relatively smooth surface Correct answer.
  2. The number of leaves on the branch
  3. The colour of the tree's bark
  4. The presence of thorns on the pod

Explanation

Criollo pods are often relatively smooth with a pointed tip, whereas many Forastero pods are more ridged and warty. Thorns, leaf number and bark colour are not reliable diagnostic features for these groups.

Question 17Cacao botany, varieties and origins

A cocoa of origin is described as having a 'forest fruit and floral' profile with low bitterness. Which combination of factors most plausibly explains this?

  1. Fine-flavour genetics combined with controlled fermentation and drying Correct answer.
  2. Forastero genetics combined with under-fermentation
  3. High-yield bulk genetics combined with extended fermentation
  4. A late harvest combined with mechanical pod breaking

Explanation

A fruity, floral and low-bitterness profile is most plausibly explained by fine-flavour genetics supported by controlled fermentation and drying. Bulk genetics, under-fermentation or rough handling tend to produce harsher, less complex profiles.

Question 18Cacao botany, varieties and origins

Two samples from the same farm differ markedly in sensory quality between harvests. Which explanation best reflects the botany and processing of cacao?

  1. Pod colour determines all flavour outcomes
  2. Genetic identity is the sole determinant of flavour
  3. Flavour is fixed at the moment of pollination
  4. Genotype sets potential, while fermentation and drying determine how much is realised Correct answer.

Explanation

Cacao genotype establishes the potential flavour profile, but fermentation and drying strongly influence which compounds develop and which are lost. This is why the same farm can produce different sensory results across harvests.

Question 19Cacao botany, varieties and origins

Which statement best captures the distinction between 'variety' and 'origin' in cacao labelling?

  1. Both terms refer to the same thing
  2. Variety describes the genetic group, while origin describes where the beans were grown Correct answer.
  3. Variety describes the country of harvest, while origin describes the fermentation method
  4. Origin refers only to the port of export

Explanation

Variety refers to the genetic group of the cacao, while origin refers to the geographic place of production. The two are related but distinct, and neither term denotes fermentation method or export port.

Question 20Cacao botany, varieties and origins

A researcher finds that a population shows intermediate sensory traits between Criollo and Forastero and displays genetic markers from both. Which conclusion is best supported?

  1. The population is a pure Criollo landrace
  2. The population is Herrania misidentified as cacao
  3. The population is a hybrid consistent with Trinitario-type ancestry Correct answer.
  4. The population is a new species of Theobroma

Explanation

Intermediate sensory traits combined with markers from both Criollo and Forastero support a hybrid interpretation consistent with Trinitario-type ancestry. This does not establish a new species, a pure landrace, or a different genus.

Question 21Cacao growing, harvest and post-harvest processing (fermentation and drying)

During fermentation, the pulp surrounding cacao beans is broken down primarily by which sequence of microorganisms?

  1. Moulds first, then acetic acid bacteria, then yeasts
  2. Yeasts first, then lactic acid bacteria, then acetic acid bacteria Correct answer.
  3. Acetic acid bacteria first, then yeasts, then moulds
  4. Lactic acid bacteria throughout, with yeasts only at the end

Explanation

The classic fermentation succession begins with yeasts that convert sugars in the pulp to ethanol under low-oxygen conditions, followed by lactic acid bacteria, and finally acetic acid bacteria that oxidise ethanol to acetic acid once air enters the turning mass. This sequence drives the temperature rise and the acidic environment that kills the bean embryo.

Question 22Cacao growing, harvest and post-harvest processing (fermentation and drying)

A producer wants to stop fermentation at the point where acetic acid has developed but before excessive acidity and off-flavours dominate. Which visual and sensory cue best indicates this turning point?

  1. The beans are still covered in white, slippery pulp and smell of fresh fruit
  2. The pulp has largely drained away, bean colour has shifted to brownish-purple, and the vinegar smell is fading Correct answer.
  3. The beans still smell strongly of vinegar and the pulp has fully liquefied
  4. A white mould layer covers the entire mass and the beans feel hot and wet

Explanation

As fermentation nears completion the pulp drains off, the bean cotyledons change from purple to brownish, and the sharp vinegar odour declines as acetic acid is consumed or volatilises. Stopping at this stage preserves chocolate flavour potential while avoiding over-fermentation.

Question 23Cacao growing, harvest and post-harvest processing (fermentation and drying)

Why are cacao beans typically turned or mixed during fermentation?

  1. To encourage mould growth that develops desirable fruity notes
  2. To cool the mass rapidly and prevent acetic acid formation
  3. To remove the pulp completely before fermentation begins
  4. To introduce oxygen, equalise temperature, and ensure even fermentation throughout the mass Correct answer.

Explanation

Turning mixes the mass so that oxygen reaches the acetic acid bacteria, temperature is equalised, and beans at the edges ferment as fully as those in the centre. It also helps drain excess pulp and prevents localised over-heating or anaerobic pockets.

Question 24Cacao growing, harvest and post-harvest processing (fermentation and drying)

Which condition most directly causes 'barnyard' or putrid off-flavours in fermented cacao?

  1. Drying the beans too quickly in full sun
  2. Excessive aeration during the first 24 hours
  3. Anaerobic, waterlogged conditions or delayed drying that allow bacterial putrefaction Correct answer.
  4. Fermentation that is too short and leaves purple cotyledons

Explanation

When the fermenting mass becomes compacted or waterlogged, oxygen is excluded and anaerobic bacteria produce foul-smelling compounds such as butyric acid and amines. Delayed or slow drying after fermentation can allow similar microbial spoilage.

Question 25Cacao growing, harvest and post-harvest processing (fermentation and drying)

A heap fermentation is described as 'turned every 48 hours, total duration 5 days'. What is the main risk of this schedule compared with more frequent turning?

  1. The mass will remain too cool and yeasts will fail to establish
  2. Anaerobic pockets and uneven fermentation may develop between turnings Correct answer.
  3. The beans will dry out too quickly and stop fermenting
  4. Acetic acid bacteria will be eliminated entirely

Explanation

Infrequent turning allows the interior of the mass to become oxygen-depleted, creating anaerobic zones and uneven fermentation, while the surface may over-heat or over-acidify. More frequent turning distributes oxygen and heat for a more uniform result.

Question 26Cacao growing, harvest and post-harvest processing (fermentation and drying)

Which statement best describes the role of the cacao pod's pulp (mucilage) during fermentation?

  1. It supplies the acetic acid that directly flavours the bean
  2. It prevents any microbial activity by lowering pH below 3
  3. It provides sugars that yeasts convert to ethanol, forming the substrate for later acid production Correct answer.
  4. It is an inert filler that plays no chemical role

Explanation

The sugary pulp is the primary energy source for yeasts, which ferment it to ethanol; acetic acid bacteria then oxidise that ethanol to acetic acid. Without adequate pulp, fermentation lacks the substrate that drives the whole process.

Question 27Cacao growing, harvest and post-harvest processing (fermentation and drying)

Which drying method is generally preferred for preserving cacao flavour quality while reaching a safe moisture level?

  1. Slow, even drying in sun with shaded or turned periods to avoid case-hardening Correct answer.
  2. Direct drying on hot metal sheets at high temperature
  3. Drying over an open smoky fire
  4. Sealing wet beans in plastic bags to equalise moisture

Explanation

Even sun drying with periodic turning and some shade allows gradual moisture loss without hardening the bean surface, which would trap acids inside. Controlled drying preserves flavour and prevents mould.

Question 28Cacao growing, harvest and post-harvest processing (fermentation and drying)

What is 'case-hardening' during cacao drying and why is it undesirable?

  1. A hard shell forming because the bean surface dries too fast, trapping moisture and acids inside Correct answer.
  2. A protective layer deliberately formed to keep insects out
  3. The formation of a hard crust on the drying mat that speeds drying
  4. The natural hardening of the cotyledon as it matures on the tree

Explanation

Rapid surface drying seals the outer layer of the bean, so internal moisture and volatile acids cannot escape, leading to mould risk and harsh flavour. Gradual drying avoids this by allowing moisture to migrate outward evenly.

Question 29Cacao growing, harvest and post-harvest processing (fermentation and drying)

Cacao beans are usually considered adequately dried for storage and trade at which approximate moisture content?

  1. Around 2–3%
  2. Around 15–18%
  3. Around 25–30%
  4. Around 7–8% Correct answer.

Explanation

Well-dried cacao typically reaches about 7–8% moisture, which is low enough to inhibit mould and maintain quality during storage and shipping. Below about 7% beans become brittle, while above about 9% mould risk rises.

Question 30Cacao growing, harvest and post-harvest processing (fermentation and drying)

A grower dries beans on a concrete patio in full sun for two days and finds many beans with cracked or split cotyledons. Which factor most likely explains this?

  1. Rapid, uneven drying causing internal stress and cracking Correct answer.
  2. Insufficient turning during fermentation
  3. Too slow drying in humid conditions
  4. Excessive fermentation time

Explanation

Very rapid drying, especially on hot surfaces in strong sun, causes the outer bean to shrink faster than the interior, producing internal stress and cracked cotyledons. Controlled, slower drying prevents this physical damage.

Question 31Cacao growing, harvest and post-harvest processing (fermentation and drying)

Which harvest indicator is the most reliable sign that a cacao pod is ready to pick?

  1. The pod has changed to its ripe colour for the variety and gives a hollow sound when tapped Correct answer.
  2. The pod has fallen to the ground and dried out
  3. The pod is still green and hard with no colour change
  4. The pod has begun to rot on the tree

Explanation

Ripeness is judged by the pod reaching its characteristic colour for the variety and by a hollow sound when tapped, indicating the pulp has matured. Colour alone varies by variety, so tapping and colour together are more reliable.

Question 32Cacao growing, harvest and post-harvest processing (fermentation and drying)

Why should harvested cacao pods be opened promptly, typically within a few days?

  1. The beans lose all their fat content within hours
  2. The beans begin to germinate and the pulp ferments uncontrolled, reducing quality Correct answer.
  3. The pod skin turns brown, which lowers the price of the shell
  4. The pods become too hard to open after a week

Explanation

Once ripe and harvested, beans inside the pod can germinate and the pulp can begin uncontrolled microbial activity, both of which impair flavour and quality. Prompt opening allows controlled fermentation to start under the producer's management.

Question 33Cacao growing, harvest and post-harvest processing (fermentation and drying)

A farmer mixes pods harvested at different ripeness stages into one fermentation batch. What is the most likely outcome?

  1. More uniform fermentation because stages average out
  2. Complete failure of fermentation
  3. Uneven fermentation, with over-fermented and under-fermented beans in the same lot Correct answer.
  4. Faster fermentation with no quality impact

Explanation

Beans at different ripeness and pulp content ferment at different rates, so a mixed batch produces a heterogeneous lot with both under- and over-fermented beans. Sorting pods by ripeness before opening improves uniformity.

Question 34Cacao growing, harvest and post-harvest processing (fermentation and drying)

Which practice best reduces the risk of mould during the drying phase in a humid climate?

  1. Spreading beans in thin layers with good airflow and covering or moving them indoors during rain Correct answer.
  2. Piling wet beans in a thick heap overnight without ventilation
  3. Drying only at night to avoid sun damage
  4. Sprinkling water on the beans to keep them cool

Explanation

Thin layers and good airflow speed moisture removal, while protecting beans from rain prevents re-wetting that encourages mould. These practices are especially important where ambient humidity is high.

Question 35Cacao growing, harvest and post-harvest processing (fermentation and drying)

Which bean colour in a cut test generally indicates good fermentation?

  1. Bright purple throughout
  2. Brown to reddish-brown with some colour variation but mostly brown Correct answer.
  3. White and chalky
  4. Grey or black with visible mould

Explanation

Well-fermented beans typically show brown to reddish-brown cotyledons, reflecting the oxidation of polyphenols during fermentation. Purple beans indicate under-fermentation, while grey or black beans suggest over-fermentation or disease.

Question 36Cacao growing, harvest and post-harvest processing (fermentation and drying)

In a cut test, a sample shows mostly brown beans but a notable proportion of slaty, purple beans. What does this most likely indicate?

  1. The beans were harvested too ripe
  2. The batch was under-fermented or unevenly fermented Correct answer.
  3. The batch was over-fermented
  4. The beans were dried too slowly

Explanation

Slaty or purple cotyledons indicate that fermentation did not proceed far enough to break down polyphenols and astringency, or that part of the mass fermented unevenly. A well-managed batch should show a high proportion of brown beans.

Question 37Cacao growing, harvest and post-harvest processing (fermentation and drying)

Which factor most strongly influences the length of the fermentation period for cacao?

  1. The colour of the dried bean cotyledon
  2. The colour of the pod skin
  3. The variety, pulp volume, ambient temperature, and mass size Correct answer.
  4. The moisture content of the dried beans

Explanation

Fermentation duration depends on genetics, the amount of pulp, ambient temperature and the size and management of the mass, which together determine microbial activity and heat build-up. Typical periods range from about five to seven days but vary widely with these factors.

Question 38Cacao growing, harvest and post-harvest processing (fermentation and drying)

Which post-harvest step most directly reduces the astringency and bitterness of raw cacao?

  1. Removing the pulp before fermentation
  2. Freezing the fresh beans before opening the pods
  3. Washing the beans with water immediately after harvest
  4. Controlled fermentation followed by drying Correct answer.

Explanation

Fermentation activates enzymes and microbial activity that reduce polyphenols and other astringent compounds, while drying stabilises the result and develops precursors to chocolate flavour. Together these steps lower bitterness and astringency.

Question 39Cacao growing, harvest and post-harvest processing (fermentation and drying)

Why is it important to avoid fermenting cacao beans in direct contact with soil or contaminated surfaces?

  1. Soil contact introduces spoilage microorganisms and off-flavours such as earthy or musty notes Correct answer.
  2. Soil contact reduces the sugar content of the pulp
  3. Soil contact speeds fermentation too much
  4. Soil contact increases the fat content of the beans

Explanation

Contact with soil and dirty surfaces can introduce spoilage microbes, including moulds and bacteria that produce earthy, musty or putrid taints. Clean, well-drained fermentation boxes or baskets help maintain quality.

Question 40Cacao growing, harvest and post-harvest processing (fermentation and drying)

During drying, beans are often turned several times per day. What is the primary benefit of this practice?

  1. It restarts fermentation inside the bean
  2. It increases the sugar content of the beans
  3. It darkens the bean colour to improve appearance
  4. It promotes even moisture loss and prevents mould on the underside of the layer Correct answer.

Explanation

Turning exposes all surfaces to air and sunlight, evening out moisture loss and preventing damp pockets where mould can grow. It also helps avoid over-heating of the layer.

Question 41Cacao growing, harvest and post-harvest processing (fermentation and drying)

A lot of beans shows a smoky, ham-like taint. Which post-harvest cause is most plausible?

  1. Drying on raised bamboo mats in the sun
  2. Drying over a smoky fire or storing near a smoke source Correct answer.
  3. Opening pods with stainless steel knives
  4. Fermenting in clean wooden boxes

Explanation

Cacao readily absorbs smoke volatiles, so drying over smoky fires or storing beans near smoke produces smoky, ham-like taints. Clean sun drying on mats avoids this defect.

Question 42Cacao growing, harvest and post-harvest processing (fermentation and drying)

Which statement about the temperature inside a fermenting cacao mass is most accurate?

  1. It remains at ambient temperature throughout
  2. It falls below 10°C because of evaporation
  3. It rises above 70°C and sterilises the beans
  4. It rises, often reaching around 45–50°C, due to microbial activity Correct answer.

Explanation

Microbial metabolism, especially acetic acid production, generates heat that raises the mass temperature to roughly 45–50°C. This heat contributes to killing the bean embryo and to the biochemical changes that develop flavour.

Question 43Cacao growing, harvest and post-harvest processing (fermentation and drying)

Which sequence correctly orders the main post-harvest steps from harvest to stable stored beans?

  1. Harvest, drying, fermentation, pod opening, bagging
  2. Harvest, fermentation, pod opening, drying, sorting
  3. Harvest, pod opening, drying, fermentation, bagging
  4. Harvest, pod opening, fermentation, drying, sorting and bagging Correct answer.

Explanation

Pods are harvested and opened to extract the beans, which are then fermented, dried to a safe moisture level, sorted for defects, and bagged for storage or shipment. Reversing fermentation and drying would prevent proper flavour development.

Question 44Cacao growing, harvest and post-harvest processing (fermentation and drying)

An exporter receives beans with a moisture reading of 12% and visible mould on some beans. What is the most appropriate interpretation?

  1. The beans are too moist and at high risk of further mould and quality loss, requiring rejection or re-drying Correct answer.
  2. The beans are well dried and ready for shipment
  3. The mould indicates excellent fermentation
  4. The high moisture will improve flavour during shipping

Explanation

A moisture content of 12% is above the safe range of roughly 7–8%, and visible mould confirms microbial spoilage, so the lot is at high risk and should be rejected or re-dried and re-graded. Shipping such beans risks worsening mould and off-flavours.

Question 45Bean-to-bar manufacturing: roasting, winnowing, refining, conching, tempering

During winnowing, what is the primary purpose of passing cracked cocoa nibs through an airflow?

  1. To reduce the cocoa butter content of the nib
  2. To cool the nibs before refining
  3. To sterilise the nibs with hot air
  4. To separate lighter husk from denser nib fragments Correct answer.

Explanation

Winnowing exploits the density and aerodynamic difference between the light, papery husk and the denser nib. Air lifts the husk away while nib pieces fall or travel separately, giving a cleaner nib stream for refining.

Question 46Bean-to-bar manufacturing: roasting, winnowing, refining, conching, tempering

What is the main role of conching in chocolate manufacture?

  1. Separating cocoa butter from the cocoa solids
  2. Adding crystalline sugar to create crunch
  3. Increasing the moisture content to improve flow
  4. Driving off volatile acids and reducing particle interaction to smooth flavour and texture Correct answer.

Explanation

Conching is a prolonged kneading and aeration that removes volatile acids and coats particles with fat, reducing viscosity and rounding out flavour. It is a finishing step, not a separation or moisture-adding step.

Question 47Bean-to-bar manufacturing: roasting, winnowing, refining, conching, tempering

Which process step immediately follows roasting and cracking in a typical bean-to-bar line?

  1. Tempering
  2. Conching
  3. Moulding
  4. Winnowing Correct answer.

Explanation

After roasting and cracking, the winnower separates husk from nib before the nibs are refined. Tempering, conching and moulding all occur later in the process.

Question 48Bean-to-bar manufacturing: roasting, winnowing, refining, conching, tempering

What does the term 'degree of roast' describe in cocoa bean processing?

  1. The temperature of the mould during setting
  2. The extent of heat treatment the beans receive, affecting flavour development Correct answer.
  3. The fineness to which nibs are ground in the refiner
  4. The percentage of cocoa butter added during conching

Explanation

Degree of roast refers to how far the roast is taken, balancing moisture removal and flavour development against loss of delicate notes. It is distinct from refining fineness and from downstream fat or moulding variables.

Question 49Bean-to-bar manufacturing: roasting, winnowing, refining, conching, tempering

Why is tempering necessary before moulding dark chocolate?

  1. To raise the melting point above body temperature permanently
  2. To stabilise the cocoa butter in the desired crystal form for snap and gloss Correct answer.
  3. To dissolve residual sugar crystals
  4. To increase the cocoa solids percentage

Explanation

Tempering promotes formation of stable cocoa butter crystals so the finished bar sets with gloss, snap and resistance to bloom. It does not change composition or permanently raise the melting point.

Question 50Bean-to-bar manufacturing: roasting, winnowing, refining, conching, tempering

In refining, what does a roller refiner primarily reduce?

  1. Husk content
  2. Cocoa butter viscosity
  3. Particle size of sugar and cocoa solids Correct answer.
  4. Volatile acid content

Explanation

Refiners grind the mixture so that sugar and cocoa solids reach a fine, uniform particle size, which governs mouthfeel. Viscosity and volatiles are addressed mainly in conching, and husk removal happens in winnowing.