7.1 Name the TWO hardness testers that are used to determine the hardness of a metal - NSC Mechanical Technology Fitting and Machining - Question 7 - 2018 - Paper 1
Question 7
7.1 Name the TWO hardness testers that are used to determine the hardness of a metal.
7.2 State the purpose of a moment tester.
7.3 Describe the tensile test appli... show full transcript
Worked Solution & Example Answer:7.1 Name the TWO hardness testers that are used to determine the hardness of a metal - NSC Mechanical Technology Fitting and Machining - Question 7 - 2018 - Paper 1
Step 1
7.1 Name the TWO hardness testers that are used to determine the hardness of a metal.
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Answer
The two hardness testers that can be used to determine the hardness of a metal are the:
Brinell hardness tester
Vickers hardness tester
Step 2
7.2 State the purpose of a moment tester.
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Answer
The purpose of a moment tester is to determine the reactions on either side of a simply loaded beam while measuring the forces at play.
Step 3
7.3 Describe the tensile test applied on steel.
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Answer
The tensile test involved subjecting a piece of steel to an increasing axial load, while measuring the corresponding elongation of the material. This test helps in determining the material's strength, ductility, and elastic limits.
Step 4
7.4 What is the reading on the depth micrometer, as shown in FIGURE 7.4 below?
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Answer
To find the reading on the depth micrometer, we add everything together. The scale shows:
Main scale reading: 100
Vernier scale reading: 11
Least count reading: 0.50
Additional reading from the scale: 0.09
Thus, the total reading is:
100+11+0.50+0.09=111.59extmm
Therefore, the final reading is 111.59 mm.
Step 5
7.5 A depth micrometer can accurately measure the depth of a hole. Name another precision measuring tool that can also measure the depth of a hole accurately.
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Answer
Another precision measuring tool that can measure the depth of a hole accurately is a Vernier caliper.
