Oilseed and Cooking Oils Quiz
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Questions and Answers

Cottonseed oil has a higher smoke point than soybean oil.

True (A)

Soybean oil accounts for approximately 40% of the dry weight of soybeans.

False (B)

Cottonseed oil is primarily used in the production of olive oil.

False (B)

The oil from soybeans is extracted using hexanes during the production process.

<p>True (A)</p> Signup and view all the answers

Cottonseed oil gives products a shorter shelf life due to its tendency to rancidify.

<p>False (B)</p> Signup and view all the answers

Soybean is the most produced oilseed globally.

<p>True (A)</p> Signup and view all the answers

Cottonseed oil is commonly found in potato chips and shortening products.

<p>True (A)</p> Signup and view all the answers

Cottonseed oil is significantly more expensive than canola oil.

<p>False (B)</p> Signup and view all the answers

Soybeans contain 40% protein.

<p>True (A)</p> Signup and view all the answers

Rapeseed oil is primarily used for frying.

<p>False (B)</p> Signup and view all the answers

Corn oil is extracted from the germ of corn.

<p>True (A)</p> Signup and view all the answers

The oil content in one bushel of corn is 5%.

<p>False (B)</p> Signup and view all the answers

Hazelnut oil contains around 71-91% linoleic acid.

<p>False (B)</p> Signup and view all the answers

High-oil varieties of corn tend to exhibit higher field yields.

<p>False (B)</p> Signup and view all the answers

The extracted oil from hazelnuts is strongly flavored.

<p>True (A)</p> Signup and view all the answers

Industrial varieties of rapeseed are considered safe for human consumption.

<p>False (B)</p> Signup and view all the answers

Palm oil is unsuitable for industrial margarines due to its low solid content.

<p>False (B)</p> Signup and view all the answers

The free fatty acid content is an important parameter for evaluating the quality of frying oils.

<p>True (A)</p> Signup and view all the answers

Water degumming is performed at temperatures ranging from 60 to 70 °C.

<p>True (A)</p> Signup and view all the answers

Margarine consists of 100% fat blended with water.

<p>False (B)</p> Signup and view all the answers

Acid degumming is not suitable for oils with high gum contents.

<p>True (A)</p> Signup and view all the answers

Shortening is primarily composed of oils and fats with some added emulsifiers.

<p>True (A)</p> Signup and view all the answers

Enzymatic degumming involves the enzyme reaction occurring at 95 °C.

<p>False (B)</p> Signup and view all the answers

Palm olein does not reduce the formation of free acids during frying when blended with other vegetable oils.

<p>False (B)</p> Signup and view all the answers

The dry acid degumming process generates a considerable amount of wastewater.

<p>False (B)</p> Signup and view all the answers

The crystallization properties of margarine are influenced by the oil forming its major ingredient.

<p>True (A)</p> Signup and view all the answers

Shortenings can affect the emulsification, lubricity, structure, aeration, flavour, and heat transfer of prepared foods.

<p>True (A)</p> Signup and view all the answers

Water is added to the crude oil during the water degumming process.

<p>True (A)</p> Signup and view all the answers

The Enzy Max process was developed by a Japanese company.

<p>False (B)</p> Signup and view all the answers

Palm oil's tendency to form alpha crystals is beneficial for aeration in batters.

<p>False (B)</p> Signup and view all the answers

Centrifugal separation of hydrated gums is a step in the water degumming process.

<p>True (A)</p> Signup and view all the answers

The moisture content in dried and degummed oil must be greater than 0.1%.

<p>False (B)</p> Signup and view all the answers

Lecitase® 10L is a microbial lipase used for enzymatic degumming.

<p>False (B)</p> Signup and view all the answers

Chemical refining of vegetable oils removes free fatty acids by a chemical reaction with caustic soda.

<p>True (A)</p> Signup and view all the answers

Physical refining involves distillation at high temperatures and low vacuum to remove impurities.

<p>True (A)</p> Signup and view all the answers

Bleaching is primarily aimed at enhancing the flavor of crude fats and oils.

<p>False (B)</p> Signup and view all the answers

Crude palm oil undergoes bleaching as the last stage of the refining process.

<p>False (B)</p> Signup and view all the answers

The bleaching process helps remove polycyclic aromatic hydrocarbons and other pollutants from fat and oil products.

<p>True (A)</p> Signup and view all the answers

Degumming is necessary to remove waxes and phosphatides from vegetable oils.

<p>True (A)</p> Signup and view all the answers

Bleaching involves mixing the oil with a liquid before removing the powder used for bleaching.

<p>False (B)</p> Signup and view all the answers

Fine virgin olive oil has a maximum acidity of 1 g/100 g.

<p>True (A)</p> Signup and view all the answers

Semi-fine virgin olive oil is defined by its good flavour and a maximum acidity of 4 g/100 g.

<p>False (B)</p> Signup and view all the answers

Virgin olive oil lampante is suitable for consumption.

<p>False (B)</p> Signup and view all the answers

Refined olive oil has a maximum acidity of 0.5 g/100 g.

<p>True (A)</p> Signup and view all the answers

Olive pomace oil has a higher maximum acidity than refined olive pomace oil.

<p>True (A)</p> Signup and view all the answers

The oil palm originated from North America.

<p>False (B)</p> Signup and view all the answers

Crude palm oil contains between 400–1000 ppm of carotenoids.

<p>True (A)</p> Signup and view all the answers

Oil palm was introduced to East Asia in the year 1784.

<p>False (B)</p> Signup and view all the answers

Flashcards

What is the smoke point of cottonseed oil?

Cottonseed oil has a high smoke point, meaning it can withstand high temperatures without breaking down or producing harmful fumes.

Why is cottonseed oil used in packaged goods?

Cottonseed oil is naturally stable and resists rancidity, making it suitable for long-term storage.

What are the primary components of soybeans?

Soybeans are a versatile crop, containing both a high percentage of protein and a significant amount of oil.

Why is soybean the most prominent oilseed?

Due to its high oil content and favorable growing conditions, soybean is the leading oilseed crop globally.

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How is soybean oil produced?

Soybean oil is extracted using a process involving cracking, heating, flaking, and solvent extraction with hexanes.

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What is the purpose of soybean meal?

After oil extraction, the remaining soybean residue, known as soybean meal, serves as a valuable animal feed source.

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What are the uses of soybean oil?

Soybean oil, both liquid and partially hydrogenated, is commonly sold as "vegetable oil" and is a primary ingredient in various processed foods.

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Why is soybean meal valuable as animal feed?

Soybean oil's high quality protein content makes it a crucial source of nutrition for animals.

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What is rapeseed oil?

Rapeseed oil, also known as canola oil, is extracted from rapeseed. It's commonly used as an edible oil and has become popular due to its low erucic acid and glucosinolate content.

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How is rapeseed used?

Traditionally, rapeseed was mainly used for birdseed and industrial purposes. However, newer varieties with low erucic acid and glucosinolate levels are now primarily used for edible oil.

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What is corn oil?

Corn oil is extracted from the germ of corn. It's widely used for cooking because of its high smoke point, a characteristic that makes it ideal for frying.

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How is corn oil used?

Corn oil is a key ingredient in some margarines and is also used for industrial purposes, including the production of soap, paints, and even biodiesel.

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What is hazelnut oil?

Hazelnut oil, extracted from hazelnuts, is a flavorful oil used for cooking. It is rich in oleic acid and is often used as a finishing oil due to its distinct taste.

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What makes hazelnut oil unique?

Hazelnut oil contains a significant amount of oleic acid, which contributes to its flavor and potential health benefits. It also contains linoleic acid, another important fatty acid.

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What is soybean oil?

Soybean oil is a versatile oil extracted from soybeans and widely used in cooking and various processed foods. It is a high-quality oil rich in polyunsaturated fatty acids and protein.

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Why is soybean oil so popular?

Soybean oil is the most prominent oilseed crop globally, used in a wide array of applications, from frying to biodiesel production. It's also a rich source of protein for animal feed.

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Oxidative Stability

A measure of how resistant an oil is to breaking down due to oxidation, which causes rancidity and unpleasant flavors.

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Free Fatty Acid Content

One way to determine the quality and freshness of frying oils. Lower free acid content means better quality.

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Shortening

The type of solid fat that is used to provide texture, flakiness, and tenderness to baked goods. It is also known as 'shortening' because it shortens gluten strands in dough.

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Palm Oil

A type of fat that can be used to create shortening. Its ability to form beta crystals contributes to good aeration in batters.

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Margarine

A spreadable product similar to butter, but made from a blend of fats, water, and other ingredients.

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Solid Fat Content

A characteristic of fats that determines how solid they are at different temperatures. It's important for making spreadable products and determining the final texture of food.

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Crystallization Properties

The ability of fats to change from a liquid to a solid state, determining the texture of the product.

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Palm Stearin

A type of palm oil with a high solid fat content, commonly used in shortening blends.

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Refining

A process in oil refining that removes gums, waxes, phosphatides, and free fatty acids, resulting in clearer, odorless, and more stable oil.

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Lecitases

Enzymes that break down phospholipids, commonly used in degumming vegetable oils.

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Bleaching

A process that removes color pigments from oil, improving its appearance and stability. It involves mixing the oil with bleaching earth, a material that absorbs impurities.

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Bleaching Earth

A type of clay used in oil bleaching, acting as a sponge to absorb pigments and other impurities.

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Chemical Neutralization

The removal of free fatty acids from oil using a chemical reaction with a strong base (caustic soda).

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Physical Neutralization

The removal of free fatty acids from oil using high temperatures and low vacuum.

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Deodorization

A process that removes volatile compounds, mainly responsible for the oil's odor and flavor, improving its shelf life.

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Smoke Point

A measure of how much an oil can be heated before it begins to break down and smoke.

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Water degumming

A degumming method that uses water to remove gums (phospholipids) from crude oil, resulting in a cleaner oil with a lower phosphorus content. It involves heating the oil, adding water, mixing, separating the hydrated gums, and drying the degummed oil.

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Acid degumming

A method of removing gums from oil using an acid (like citric acid). It's effective for oils with low gum content, like palm oil. The acid reacts with the gums, making them easier to remove through filtration. The process is efficient, uses low energy, and is environmentally friendly.

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Enzymatic degumming

A degumming process that uses enzymes to break down gums (phospholipids) in oil. It's a gentler method compared to water or acid degumming. Enzymes are added to the oil under optimal conditions, and they selectively target the phospholipids for removal.

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Membrane degumming

A degumming method that uses a membrane to separate gums from oil. The oil is passed through a membrane with pores small enough to trap the gums, allowing the clean oil to pass through. This method is particularly useful for removing small particles and achieving high purity oil.

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Degumming

The gum removal step in oil refining. It involves removing phospholipids, which cause oil to become cloudy and negatively impact its stability and shelf life. The process is essential for producing high-quality, stable oil.

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Crude palm oil degumming

A process to remove impurities from crude palm oil, including gums. It aims to improve the oil's quality and stability, making it suitable for various applications.

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Crude corn oil degumming

A process to remove impurities from crude corn oil, including gums. It aims to create a refined corn oil with improved properties, such as clarity and stability.

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Degumming equipment

Equipment specifically designed for degumming processes in oil refining. This equipment may include mixers, separators, and vacuum dryers to facilitate the removal of gums.

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Fine Virgin Olive Oil

The highest quality olive oil with the most intense flavor and aroma, having a maximum acidity of 1 g/100 g of oleic acid.

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Semi-fine Virgin Olive Oil

Good quality olive oil with a slightly lower flavor intensity than Fine Virgin Olive Oil, having a maximum acidity of 2 g/100 g of oleic acid.

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Virgin Olive Oil Lampante

Olive oil that is not suitable for direct consumption due to its off-flavors and high acidity, mainly used for refining or technical applications.

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Refined Olive Oil

Olive oil that is produced from virgin olive oil through refining processes, resulting in a neutral flavor and a maximum acidity of 0.5 g/100 g of oleic acid.

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Olive Oil

A blend of virgin olive oil (except Lampante) and refined olive oil, offering a balanced flavor profile and a maximum acidity of 1.5 g/100 g of oleic acid.

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Refined Olive Pomace Oil

Oil obtained by extracting oil from olive pomace using solvents, having a maximum acidity of 0.5 g/100 g of oleic acid.

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Olive Pomace Oil

Oil extracted from the pulp (pomace) after oil has been extracted the conventional way; this oil is refined to neutralize bad flavors and a maximum acidity of 1.5 g/100 g of oleic acid.

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Oil palm

The oil palm (Elaeis guineensis jacquin) is a tropical tree native to South Africa, known for its high-yielding fruit, which is used to extract palm oil.

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Color of oil palm fruit

The distinctive red-orange color of oil palm fruit is attributed to the abundance of carotenoids and anthocyanins, particularly in crude palm oil.

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Carotenoid content in crude palm oil

Crude palm oil, extracted through a process of sterilization and pressing, contains a significant concentration of carotenoids, ranging from 400 to 1000 ppm.

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Factors influencing carotenoid content

The carotenoid content in crude palm oil can vary depending on the processing conditions, species of oil palm, and level of oxidation.

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Flavor of palm oil

Palm oil has a unique flavor profile that can be influenced by the processing methods used. It typically has a slightly fruity and nutty undertone.

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Melting point of palm oil

Palm oil is characterized by its high melting point, which makes it suitable for use in solid fats and products like margarine.

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Significance of palm oil

Palm oil is a valuable agricultural commodity, and its production plays a significant role in the economies of many tropical countries. It is an essential ingredient in numerous industries, including food, cosmetics, and biofuels.

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Production of palm oil

The global production of palm oil has been growing rapidly, driven by increasing demand and its versatility in various sectors.

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Environmental impact of palm oil

Palm oil production has been associated with some environmental concerns, including deforestation and habitat loss. Sustainable palm oil production practices are being adopted to address these issues.

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Nutritional benefits of palm oil

Palm oil is a source of several essential nutrients, including Vitamin E, antioxidants, and saturated fatty acids.

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Health implications of palm oil

While palm oil is generally considered safe for consumption, its high saturated fat content has raised concerns about its potential impact on cardiovascular health.

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Uses of palm oil in the food industry

Palm oil's versatility, availability, and affordability have made it a widely used ingredient in numerous food products, including baked goods, snacks, and processed foods.

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Non-food uses of palm oil

Palm oil is also used in non-food applications, such as biofuels and as a base for cosmetics and personal care products.

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Study Notes

Fats and Oil Technology

  • Fats and oils are macronutrients, crucial for a healthy diet
  • Fats and oils are used in manufacturing, coming from either plants or animals

Global Oilseed Production

  • A chart showing global oilseed production (soybeans, cottonseed, sunflower seed, rape seed, canola, others) in millions of tons from 2006 to 2011
  • Total global production fluctuates each year, varying across different crops

Country-Specific Oilseed Production

  • A pie chart showing world oilseed production distribution by country in percentages (e.g., USA, Brazil, China, India)
  • The chart provides specific production figures in millions of tons for some countries for 2009, 2001 , providing data on major contributors

Global Vegetable Oil Production

  • A chart showing global vegetable oil production(soybean, cottonseed, sunflower, rapeseed, palm, other) in millions of tons from 2006 to 2011
  • There is a substantial difference year-to-year in production volumes across various oil types

Turkey Oilseed Production

  • A bar graph displaying Turkey's oilseed output (sunflower, cottonseed, soybeans, canola) in thousands of tons from 2007 to 2011
  • Showing yearly oilseed production by type

Vegetable Oils Composition

  • Fatty acid composition of different vegetable oils in percentages (e.g., canola, coconut, corn, cottonseed, olive, palm, peanut, safflower, soybean, sunflower)
  • Also details the smoke point in Fahrenheit and Celsius

Saturated Fatty Acids Examples

  • A table listing saturated fatty acids, their chemical structures, and their carbon:double bond ratios.

Types of Vegetable Oils

  • Different plant and animal origins of edible oil products are listed (cottonseed, soybean, sunflower, corn etc.)
  • Listing of some animal fat products are also categorized

Refining of Vegetable Oils

  • Different refining methods are categorized into:
  • Mechanical (cold/hot pressing)
  • Solvent extraction, highlighting different solvent types used,
  • Stages of refining:
    • Degums
    • Neutralization
    • Bleaching
    • Deodorization
    • Winterization

Palm Oil

  • Origin of oil palm is from South Africa, introduced to East Asia
  • Oil palm consists of palm fruit, kernel containing various proportions of carotenoids
  • The dark red-orange coloring of the oil palm fruit is due to high concentrations of carotenoids and anthocyanins
  • Different properties, compositions are examined in Malaysian, Brazilian and other types

Margarine

  • Margarine is a product manufactured with 80% fat, water and other added vitamins
  • The solid fat content at different temperatures is a crucial characteristic
  • Palm oil is a good fitting fat for industrial margarine

Shortening

  • Shortening is typically used in baked goods, and can impact emulsification and aeration
  • Palm oil is commonly used in shortening products
  • Palm oil's crystal characteristics make it suitable for baking

Crude Oil Extraction

  • A flowchart illustrates the crude oil extraction process, highlighting steps like pressing, centrifugation and solvent extraction.
  • The process involves different stages and equipment, from initial crushing to product filtering and purification.

Deodorization

  • Deodorization removes odors, involves varying approaches, such as batch, semi-continuous and continuous deodorizers.
  • Varying temperatures are used with different levels of pressure

Winterization

  • The process of solidification and removal of particular oils by low temperature treatment
  • Used for extracting waxes and triglycerides from oils

Hydrogenation

  • Chemical process for adding hydrogen atoms into double bonds of unsaturated fatty acids.
  • Transforming unsaturated fats to fully or partially saturated fats
  • Increasing the melting point and improving the structure and consistency of products
  • Creates different fatty acid compositions and structures

Enzymatic interesterification

  • This process involves the enzymatic exchange of fatty acids on a glycerol backbone in fats
  • Used to reconfigure fats and oils with desirable melting points, or suited for baking or other applications.

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Description

Test your knowledge on different types of oilseeds and their oils, including cottonseed, soybean, and palm oil. This quiz covers various properties, production methods, and usage of these oils in cooking and food products. Discover how oils are extracted and their nutritional content.

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