Food Packaging Technology Questions and Answers – Manufacture of Tinplate – 2

This set of Food Packaging Technology Multiple Choice Questions & Answers (MCQs) focuses on “Manufacture of Tinplate – 2”.

1. Which of the following is not an iron ore?
a) Hematite
b) Magnetite
c) Cryolite
d) Limonite
View Answer

Answer: c
Explanation: Cryolite (Na3AlF6, sodium hexafluoroaluminate) is an aluminum ore. Hematite (Fe2O3), Siderite (FeCO3), Magnetite (Fe3O4) and Limonite (FeO•nH2O) are iron ores.

2. _________ is the process after cold rolling.
a) Pickling
b) Annealing
c) Tempering
d) Milching
View Answer

Answer: b
Explanation: Annealing is the process after cold rolling. In the process of annealing the steel is heated to temperatures of 600°C 700°C to relieve the stresses from the rolling process.

3. Annealing is done to remove the stresses from steel.
a) True
b) False
View Answer

Answer: a
Explanation: The given statement is true. Annealing removes stress by mildly increasing the temperature. Annealing results in recrystallization of the elongated ferrite grains into new fine grains.
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4. Annealing takes place before cold rolling.
a) True
b) False
View Answer

Answer: b
Explanation: The given statement is false. Annealing takes place after cold rolling. Two different annealing processes are used after cold rolling: continuous annealing (which results in a strong material with a fine grain structure) and batch annealing (which has a coarse grain structure but excellent formability).

5. Temper rolled steel is also known as ________ reduced.
a) single
b) double
c) triple
d) seam
View Answer

Answer: a
Explanation: Temper rolled steel is also known as single reduced. Temper rolling imparts springiness to the steel. Temper rolling is done after annealing.
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6. Cold rolled steel is also known as ________ reduced.
a) single
b) double
c) triple
d) seam
View Answer

Answer: b
Explanation: Cold rolled steel is also known as double reduced. Double reduced (DR) material is very strong and stiff and has a higher hardness for a given thickness, allowing the use of comparatively thin gauges for many applications. However, it has only limited forming possibilities.

7. The minimum thickness for single reduced steel is ______
a) 0.16 mm
b) 0.12 mm
c) 0.18 mm
d) 0.10 mm
View Answer

Answer: c
Explanation: Minimum thickness for double reduced steel is 0.18 mm for single reduced (SR) plate. Temper rolled steel is also known as single reduced.
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8. The minimum thickness for double reduced steel is ______
a) 0.16 mm
b) 0.12 mm
c) 0.18 mm
d) 0.10 mm
View Answer

Answer: b
Explanation: Minimum thickness for double reduced steel is 0.12 mm for double reduced (DR) plate. Cold rolled steel is also known as double reduced.

9. Tinplate displays excellent deep-drawing behavior.
a) True
b) False
View Answer

Answer: a
Explanation: The given statement is true. Tinplate display excellent deep-drawing behavior. It is due to a high Lankford coefficient (or coefficient of anisotropy).
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10. Lankford coefficient is a measure of ___________
a) bendiness
b) graininess
c) plastic anisotropy
d) crystallinilty
View Answer

Answer: c
Explanation: Lankford coefficient is a measure of the plastic anisotropy of rolled sheet metal. It is used as an indicator of the formability of recrystallized low-carbon steel sheets. It ensures near-identical behavior, irrespective of the orientation of the deformation in relation to the rolling direction, an important consideration in drawn and redrawn (DRD) can manufacture.

Sanfoundry Global Education & Learning Series – Food Packaging Technology.

To practice all areas of Food Packaging Technology, here is complete set of 1000+ Multiple Choice Questions and Answers.

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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