Fruit Juice Technology

Description: This quiz covers the various aspects of Fruit Juice Technology, including processing, preservation, and quality control.
Number of Questions: 14
Created by:
Tags: food science fruit juices processing preservation quality control
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Which of the following is NOT a common method for extracting juice from fruits?

  1. Crushing and pressing

  2. Centrifugation

  3. Filtration

  4. Maceration


Correct Option: C
Explanation:

Filtration is not a common method for extracting juice from fruits, as it is more commonly used for clarifying or filtering juice after it has been extracted.

What is the primary role of enzymes in fruit juice processing?

  1. To enhance juice flavor

  2. To improve juice color

  3. To aid in juice extraction

  4. To reduce juice acidity


Correct Option: C
Explanation:

Enzymes are commonly used in fruit juice processing to aid in juice extraction by breaking down cell walls and releasing juice from the fruit.

Which of the following is NOT a common method for preserving fruit juices?

  1. Pasteurization

  2. Sterilization

  3. Refrigeration

  4. Freezing


Correct Option: C
Explanation:

Refrigeration is not a common method for preserving fruit juices on a large scale, as it only extends the shelf life of the juice for a short period of time.

What is the primary role of clarification in fruit juice processing?

  1. To remove solids from the juice

  2. To improve juice color

  3. To adjust juice acidity

  4. To enhance juice flavor


Correct Option: A
Explanation:

Clarification is a process used in fruit juice processing to remove solids, such as pulp and sediment, from the juice, resulting in a clear and visually appealing product.

Which of the following is NOT a common quality control parameter for fruit juices?

  1. pH

  2. Brix

  3. Acidity

  4. Color


Correct Option: D
Explanation:

While color is an important aspect of fruit juice quality, it is not typically measured as a quality control parameter, as it can vary naturally depending on the type of fruit and processing conditions.

What is the primary role of deaeration in fruit juice processing?

  1. To remove oxygen from the juice

  2. To improve juice flavor

  3. To adjust juice acidity

  4. To enhance juice color


Correct Option: A
Explanation:

Deaeration is a process used in fruit juice processing to remove oxygen from the juice, which helps to prevent oxidation and spoilage, thereby extending the shelf life of the product.

Which of the following is NOT a common type of fruit juice concentrate?

  1. Frozen concentrate

  2. Evaporated concentrate

  3. Powdered concentrate

  4. Refrigerated concentrate


Correct Option: D
Explanation:

Refrigerated concentrate is not a common type of fruit juice concentrate, as it requires refrigeration to maintain its quality and prevent spoilage.

What is the primary role of homogenization in fruit juice processing?

  1. To improve juice texture

  2. To enhance juice flavor

  3. To adjust juice acidity

  4. To reduce juice viscosity


Correct Option: A
Explanation:

Homogenization is a process used in fruit juice processing to break down large particles and create a smooth and uniform texture, improving the overall mouthfeel of the juice.

Which of the following is NOT a common method for packaging fruit juices?

  1. Glass bottles

  2. Plastic bottles

  3. Tetra Paks

  4. Cans


Correct Option: D
Explanation:

Cans are not a common method for packaging fruit juices, as they can impart a metallic taste to the juice and are not as convenient for consumers as other packaging options.

What is the primary role of pasteurization in fruit juice processing?

  1. To kill harmful microorganisms

  2. To improve juice color

  3. To adjust juice acidity

  4. To enhance juice flavor


Correct Option: A
Explanation:

Pasteurization is a process used in fruit juice processing to kill harmful microorganisms, such as bacteria and yeast, ensuring the safety and extending the shelf life of the product.

Which of the following is NOT a common type of fruit juice additive?

  1. Sugar

  2. Acids

  3. Preservatives

  4. Enzymes


Correct Option: D
Explanation:

Enzymes are not typically added to fruit juices as additives, as they are naturally present in the fruit and play a role in various processes during juice extraction and processing.

What is the primary role of sterilization in fruit juice processing?

  1. To kill all microorganisms

  2. To improve juice color

  3. To adjust juice acidity

  4. To enhance juice flavor


Correct Option: A
Explanation:

Sterilization is a process used in fruit juice processing to kill all microorganisms, including spores, ensuring the complete safety and stability of the product.

Which of the following is NOT a common method for evaluating the quality of fruit juices?

  1. Sensory evaluation

  2. Chemical analysis

  3. Microbiological analysis

  4. Physical analysis


Correct Option: A
Explanation:

Sensory evaluation is not typically used as a method for evaluating the quality of fruit juices, as it is subjective and can vary among individuals.

What is the primary role of filtration in fruit juice processing?

  1. To remove solids from the juice

  2. To improve juice color

  3. To adjust juice acidity

  4. To enhance juice flavor


Correct Option: A
Explanation:

Filtration is a process used in fruit juice processing to remove solids, such as pulp and sediment, from the juice, resulting in a clear and visually appealing product.

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