Q1. More than 95% of carbonated drink containers are _______ aluminium cans.

1. One-piece
2. Two-piece
3. Three-piece
4. Four piece

ANSWER: B. Two-piece

• Explanation: Aluminum is the most recycled nonferrous metal. Two-piece aluminum cans make up more than 95 percent of carbonated beverage containers. Aluminium is also used to package cereal and frozen meals in aerosol containers and foil–plastic–paper laminates. Food trays are also made of aluminum. All of these can be found in municipal solid garbage and are collected. Before the aluminum can be utilized to manufacture fresh sheet stock, organic coatings must be removed. It is carried out in specialized furnaces. Approximately 90% of recovered aluminum cans are recycled into new cans. The remaining aluminum is utilized to produce other items.

READ MORE – Food Science & Technology Quiz (17-04-2022)

Q2. _______ degenerates the packaging containers into individual fibers dispersed in water.

1. High-density cleaning
2. Fine screening
3. Pulping
4. Centrifugal screening

ANSWER: C. Pulping

• Explanation – Pulping, high-density cleaning, coarse and fine screening, centrifugal cleaning, fiber fractionation, and refining are the main procedures in recycling old corrugated containers and other paper packing materials. The containers are pulped into individual fibers that are disseminated in water. Huge dense particles such as nails and large staples are removed via high-density cleaning. Large low-density pollutants, such as unpulped tapes and large adhesive particles, are removed by coarse screening.

READ MORE – Food Science & Technology Quiz (07-05-2022)

Q3. ________ test is performed on papers and it indicates the strength of the paper.

1. Tear strength
2. Tearing resistance
3. Bursting strength
4. Both A and B

ANSWER – D. Both A and B

• Explanation: Tear Strength or Tearing Resistance is a test that is done on papers and provides information about the paper’s strength. It aids in the choosing of papers for packaging applications based on the material. Depending on the packaging material’s eventual usage, the tear strength requirements may be high or low. The energy absorbed by the test sample in propagating a rip that has already been started by cutting a small nick in the test piece is measured in this test.

READ MORE – Food Science & Technology Quiz (16-04-2022)

Q4. ________ test measures the amount of water absorbed by the sample during penetration from one side to another.

1. Bursting strength
2. Thermal shock test
3. Water Penetration-Cobb
4. Grease resistance

ANSWER: C. Water Penetration-Cobb

• Explanation:  The amount of water absorbed by the sample during penetration from one side to the other is measured by the Water Penetration-Cobb Test. It’s important for determining whether paper and paperboards are suitable for shipping containers that may be subjected to water spray. A weighed sample (paper/paper board) is clamped under a metal base plate and submerged in water for one minute. The visible surface is 100 cm2. The sample is withdrawn, blotted, and reweighed when the specified time has passed. The weight difference reflects how much water the sample has absorbed. The results are given in grams per square meter.

READ MORE – Food Science & Technology Quiz (16-03-2022)

Q5. ______ test is performed when the bottles are subjected to sudden temperature differences during actual filling and use.

1. Impact test
2. Thermal shock test
3. Grease resistance
4. Bursting strength

ANSWER: B. Thermal shock test

• Explanation – When the bottles are subjected to a sudden temperature differential during actual filling and usage, the Thermal Shock Test is done. Sterilized food/beverage is packed in bottles in the food sector, and sanitized bottles are sterilized by hot steam before use in the pharmaceutical industry. In this test, a few bottles are immersed in a hot water bath at 72 2°C for 300 10 seconds, then taken out with the hot water inside and quickly dipped in a cold water bath at 30 2° C for 30 seconds. The difference in temperature between the hot and cold water baths causes the bottles to experience thermal shock.

READ MORE – Food Science & Technology Quiz (16-05-2022)

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