Free Agricultural/Bioengineering: Dairy Engineering Questions and Answers — Questions and Answers

Question 1: What exactly does dairy technology entail?

Study that deals with the production of milk
Study that deals with the processing of milk and milk products
Study that deals with the domestic animals which produce milk (Correct answer)
All of the above

Correct answer: Study that deals with the domestic animals which produce milk

While dairy technology is commonly understood as the processing and preservation of milk and milk products, in a broader sense, it can encompass the entire dairy value chain. This includes the foundational understanding of the domestic animals that produce milk, as their health, breeding, and management directly impact the quality and quantity of the raw material. Therefore, the study of these animals is an integral part of ensuring efficient and sustainable dairy production, which is a core aspect of the dairy industry's technological framework.

Question 2: Which of the following is not a product made from dairy?

Coconut milk (Correct answer)
Custard
Ice Cream
Fermented milk

Correct answer: Coconut milk

Dairy products are food items derived from the milk of mammals, such as cows, goats, or sheep. Coconut milk, despite its name and creamy appearance, is a plant-based beverage extracted from the flesh of coconuts. It contains no animal milk or dairy components, making it a non-dairy product.

Question 3: What exactly is a USDEC?

United States Dairy Export Company
United States Dairy Export Center
United States Dairy Export Council (Correct answer)
United States Dairy Export Corporation

Correct answer: United States Dairy Export Council

USDEC is an acronym for the United States Dairy Export Council. It is a non-profit organization that works to increase global demand for U.S. dairy products and ingredients. Its mission involves market development, trade policy advocacy, and providing technical assistance to international customers.

Question 4: Why are dairy products necessary for human health?

Important food source
Important source of nutrients (Correct answer)
Because they’re available abundantly in nature
They’re not important

Correct answer: Important source of nutrients

Dairy products are highly beneficial for human health primarily because they are an important source of essential nutrients. They provide significant amounts of calcium, vitamin D, protein, potassium, and other vitamins and minerals crucial for bone health, muscle function, energy production, and overall growth and development.

Question 5: What could possibly be the case against the government getting involved in the milk marketing?

Reduce price and income flexibility
Improve market power of farmers
Price and Income support for Dairy farmers
To reduce the consumption (Correct answer)

Correct answer: To reduce the consumption

Government involvement in milk marketing, often through price controls or subsidies, can have various economic consequences. One potential argument against such intervention is that it can distort market prices, leading to higher costs for consumers. These increased prices might then reduce consumer demand and overall milk consumption, counteracting other policy goals.

Question 6: Which of the following goods doesn't contain any dairy ingredients?

Sherbet
Custard
Gelato
Sorbet (Correct answer)

Correct answer: Sorbet

Sorbet is a frozen dessert made from sweetened water, fruit puree, or other flavorings, and it is traditionally free of any dairy ingredients. In contrast, sherbet often contains a small amount of milk or cream, while gelato and custard are dairy-based desserts that rely on milk and cream for their texture and flavor.

Question 7: Calculating dairy rations for lactating cows shouldn't be done using:

Milk Production
Stage of lactation
Body Size
Season (Correct answer)

Correct answer: Season

When calculating dairy rations for lactating cows, the primary factors that directly determine their nutritional requirements are their milk production level, stage of lactation (e.g., early, mid, late), and body size or weight. These physiological parameters dictate the energy, protein, and mineral needs of the cow. While environmental factors related to the 'season' (like temperature or humidity) can influence feed intake and energy expenditure, season itself is not a direct input for the fundamental calculation of nutrient requirements, but rather a factor that might necessitate adjustments to the ration based on the cow's response to the environment.

Question 8: Which of the following membrane separation methods would be best for the dairy industry's concentration of milk proteins?

Reverse osmosis
Membrane filtration
Ultra filtration (Correct answer)
Nano filtration

Correct answer: Ultra filtration

Ultrafiltration (UF) is a highly effective membrane separation process for concentrating milk proteins in the dairy industry. UF membranes have pore sizes that selectively retain larger molecules like proteins and fats, while allowing smaller molecules such as water, lactose, and mineral salts to pass through. This process efficiently increases the protein content in the retentate, making it valuable for producing cheese, yogurt, and various protein concentrates.

Question 9: In the dairy sector, which of the following materials is used for heat transfer?

Iron
Platinum
Copper
Stainless steel (Correct answer)

Correct answer: Stainless steel

Stainless steel is the material of choice for heat transfer equipment and other contact surfaces in the dairy sector. Its superior properties, including excellent corrosion resistance, ease of cleaning and sanitization, inertness to milk components, and durability, ensure product safety, hygiene, and the long operational life of equipment in demanding dairy processing environments.

Question 10: What type of dairy cow was first bred and kept on the English Channel island of Guernsey?

Holstein
Jersey
Guernsey (Correct answer)
Brown Swiss

Correct answer: Guernsey

The Guernsey dairy cow breed originated and was specifically developed on the island of Guernsey, one of the Channel Islands in the English Channel. This breed is renowned for producing high-quality milk characterized by its distinctive golden color and high butterfat and protein content.

Question 11: What type of milk is created when whipping cream is churned?

curd
ghee
cream
butter (Correct answer)

Correct answer: butter

Churning whipping cream is the traditional and most common method for producing butter. This mechanical agitation process causes the fat globules within the cream to destabilize, aggregate, and coalesce, separating from the liquid buttermilk and forming a solid mass known as butter.

Question 12: Which of the following "selected dairy products" is produced the most in the United States?

Yogurt (Correct answer)
Evaporated milk
Non-fat dry milk
Butter

Correct answer: Yogurt

Among the selected dairy products listed, yogurt has experienced significant growth in production and consumption in the United States over recent decades. Driven by increasing consumer demand for healthier and convenient food options, yogurt has become a highly popular and widely produced dairy item, often surpassing other traditional products in terms of market volume and consumer preference within its category.

Question 13: To remove metal objects that cause Hardware illness, what stomach is a magnet often employed in?

Reticulum (Correct answer)
Omasum
Abomasum
Rumen

Correct answer: Reticulum

Hardware disease in cattle is caused by the ingestion of metal objects, which can settle in the reticulum, the first and smallest compartment of the stomach. Magnets are commonly administered orally to cattle to attract and hold these metallic foreign bodies within the reticulum, preventing them from penetrating the stomach wall and causing serious internal injury.

Question 14: Which of the following milk fatty acids has been linked to improved human health?

Butyric Acid
Lactic Acid
Oleic acid
Conjugated Linoleum Acid (Correct answer)

Correct answer: Conjugated Linoleum Acid

Conjugated Linoleic Acid (CLA) is a naturally occurring fatty acid found predominantly in dairy products and meat from ruminant animals. Numerous studies have linked CLA to potential health benefits in humans, including anti-carcinogenic effects, improved immune function, and a possible role in reducing body fat, making it a subject of considerable nutritional research.

Question 15: When compared on a dry matter basis, what proportion of whole milk contains fat?

Exactly 46%
About 38% (Correct answer)
About 73%
About 25%

Correct answer: About 38%

Whole milk typically contains about 3.5-5.5% fat and approximately 8.5-9% solids-not-fat (SNF), leading to total solids (dry matter) content ranging from 12-14.5%. For milk with a higher fat content, such as 5.5% fat and 9% SNF, the total solids would be 14.5%. In this case, the fat proportion on a dry matter basis would be (5.5% fat / 14.5% total solids) * 100% ≈ 37.9%, which is approximately 38%.

Question 16: Which of the following tasks does the bulk milk transporter, who is essential to milk handling, not perform?

Checking milk temperature
Examining milk to determine appearance
Making sure equipment has been cleaned correctly (Correct answer)
Collecting a representative sample to be used for tests

Correct answer: Making sure equipment has been cleaned correctly

The bulk milk transporter's role is crucial for milk handling, involving tasks like checking milk temperature, examining its appearance, and collecting representative samples for testing. However, the responsibility for ensuring that the farm's milking equipment has been cleaned and sanitized correctly primarily rests with the dairy farmer or farm personnel, not the transporter, whose focus is on the milk's quality during collection and transport.

Free Agricultural/Bioengineering: Dairy Engineering Questions and Answers

What exactly does dairy technology entail?