Food Engineering and Preservation Techniques

What is a primary reason food spoils?

• Exposure to excessive light.

• Growth of microbes like bacteria.

• Incorrect packaging materials.

• Lack of proper transportation.

How does drying fruit, like grapes to make raisins, help preserve them?

• It adds a protective layer to the fruit's surface.

• It removes water, which inhibits microbial growth.

• It increases the sugar content, making them less appealing to pests.

• It changes the fruit's chemical composition to prevent spoilage.

Why is stainless steel often preferred over copper for food processing equipment?

• Stainless steel is more affordable and easier to acquire.

• Stainless steel is less reactive and resistant to corrosion, preventing contamination.

• Copper surfaces are too smooth for proper food flow.

• Copper is a better conductor of heat, which is undesirable.

What is the primary function of a homogenizer in food production?

• To heat the food to kill bacteria.

• To separate different components of a liquid mixture.

• To break down large particles and evenly distribute them for a smoother texture.

• To add flavorings and sweeteners to the food.

What is the primary purpose of pasteurization in food processing?

• To enhance the flavor of food products.

• To increase the nutritional value of food.

• To kill off harmful bacteria and prolong shelf life.

• To change the chemical nature of ingredients for new textures.

Why is the viscosity of ice cream mix an important consideration when designing pasteurization machinery?

• To ensure the ice cream has a smooth texture after freezing.

• To prevent the ice cream from melting too quickly.

• To efficiently transfer heat throughout the mixture.

• To allow for easier packaging into different container sizes.

How does storing frozen foods at a lower temperature generally affect their shelf life?

• It decreases the shelf life by causing freezer burn.

• It has no significant effect on the shelf life.

• It extends the shelf life by slowing down spoilage.

• It changes the chemical composition, making the food inedible.

Beyond making desserts, what significant global challenge does food engineering aim to address?

• Reducing the cost of luxury food items.

• Meeting the growing demand for healthy, nutritious food for a rising population.

• Developing new types of artificial flavors and colors.

• Creating more efficient ways to transport food for recreational purposes.