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Name and describe the FOUR tests used to distinguish between the different types of materials - NSC Mechanical Technology Welding and Metalwork - Question 3 - 2019 - Paper 1
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Name and describe the FOUR tests used to distinguish between the different types of materials. Give the reason why the following heat-treatment processes are perfor... show full transcript
Worked Solution & Example Answer:Name and describe the FOUR tests used to distinguish between the different types of materials - NSC Mechanical Technology Welding and Metalwork - Question 3 - 2019 - Paper 1
Step 1
Name and describe the FOUR tests used to distinguish between the different types of materials.
Answer
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Bending Test: This test involves hitting the metal with a hammer to observe its ability to bend without breaking, providing insights into its ductility.
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Filing Test: In this test, a file is used to assess the material's composition based on the color and ease with which the file works on the material, indicating hardness and durability.
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Machining Test: This test employs a machine to remove material from the sample, allowing the evaluator to determine the ease of machining, which is influenced by the material's hardness and toughness.
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Sound Test: By dropping the sample on the floor, one can listen to the resulting sound. Metals produce different sounds based on their properties; high-pitched sounds may indicate hardness, while lower sounds might suggest a softer material.
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Spark Test: This test examines the shape and color of sparks produced when a material is ground. Different metals produce unique spark patterns, aiding in material identification.
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