Q1. The plastic raw material (resin) for packaging material is in the form of _____.

1. Powder
2. Tablets
3. Gum
4. Pellets

ANSWER: D. Pellets

• Explanation – Pellets are used to make the plastic raw material (resin). In various operations, powdered plastics are employed. While some polymers are employed in subsequent packaging processes as coatings, adhesives, or additives, the first significant stage in the conversion of plastic resin into films, sheets, containers, and other products is to transform the pellets from solid to liquid or molten phase in an extruder. A combination of pressure, friction, and heat melt the plastic.

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Q2. Film stretched in one direction only is described as being?

1. Mono-oriented
2. Biaxially oriented
3. Multi-oriented
4. All of the above

ANSWER: A. Mono-oriented

• Explanation – Mono-oriented film is stretched in only one direction. Biaxially orientated film has been stretched in both directions. The gas and water vapor barrier characteristics are improved by packing the molecules closer together. The mechanical strength of the film is improved by orienting the molecules. Oriented films are heated near their melting point to anneal or relieve tensions and reduce shrinkage during post-production processes like printing or heat sealing.

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Q3. _______ are prepared by extrusion blow molding.

1. Paper
2. Tetrapack
3. Bottles
4. Thermoform trays

ANSWER – C. Bottles

• Explanation: Extrusion blow molding is used to make bottles. A thick tube of plastic is extruded into a bottle mold, which closes around the tube, creating the distinctive jointed seal at the container’s bottom. The plastic is then forced into the mold shape using air pressure. The item is taken from the mold once it has cooled. (A faint line may be seen on the bottle where the two parts of the mold are linked.) Milk bottles (HDPE) and wide mouth jars are made by blow molding.

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Q4. Screw-top cans are containers with?

1. Threaded closures
2. Slipcover closures
3. Easy open ends
4. None of the above

ANSWER: A. Threaded closures

• Explanation: Containers having threaded closures are known as screw-top cans. Threaded spouts and applicators came in a range of shapes and sizes. The size of the container’s outer threads could be used to specify a closure. Because threaded profiles have no industry standards, caps from one manufacturer may not fit containers from another. To ensure a proper fit, caps, and containers must be acquired from the same vendor.

READ MORE – Food Science & Technology Quiz (27-02-2022)

Q5. ______ by D&I process is extensively used for pasteurized beverages such as beer and soft drinks.

1. Aluminium cans
2. Ferrous metal
3. Tin free steel
4. All of the above

ANSWER: A. Aluminium cans

• Explanation – Pasteurized beverages such as beer and soft drinks are commonly packaged in aluminum cans made by the D&I process. Beer includes carbonic gas, which can cause interior pressure to rise to ten times that of food cans when pasteurized after sealing. As a result, the beer can must be built to withstand pressures of up to 7 kg/cm2. Aluminum cans save money on transportation because they are lighter per cm2. The energy required to remelt aluminum cans into aluminum slabs is only 5% of that required to manufacture virgin metal from bauxite ore.

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