7.1 State THREE different test results that can be obtained from a tensile tester - NSC Mechanical Technology Fitting and Machining - Question 7 - 2022 - Paper 1
Question 7
7.1 State THREE different test results that can be obtained from a tensile tester.
7.2 FIGURE 7.2 below shows a diagram of a Brinell hardness tester. Label A–C.
7.... show full transcript
Worked Solution & Example Answer:7.1 State THREE different test results that can be obtained from a tensile tester - NSC Mechanical Technology Fitting and Machining - Question 7 - 2022 - Paper 1
Step 1
State THREE different test results that can be obtained from a tensile tester.
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Answer
The tensile tester can provide the following results:
Yield Stress: The stress at which a material begins to deform plastically.
Ultimate Tensile Stress: The maximum stress that a material can withstand while being stretched or pulled before necking.
Elongation Percentage: The percentage increase in length of a material after it has been subjected to a tensile force.
Step 2
FIGURE 7.2 below shows a diagram of a Brinell hardness tester. Label A–C.
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A - Work piece / Test piece: This is the material being tested for hardness.
B - Steel Carbide ball / Indenter: The hard ball used to make the indentation on the test piece.
C - Indentation diameter: The diameter of the indentation left by the indenter on the workpiece.
Step 3
Calculate the cutting depth of a screw thread with a pitch of 1.75 mm.
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Answer
To calculate the cutting depth, we can use the formula:
Determine the depth micrometer reading shown in FIGURE 7.4 below.
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Answer
The depth micrometer reading is determined as follows:
The reading reads 17.36 mm.
Step 5
Describe the function of a moment tester.
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Answer
The function of a moment tester is to determine the reactions on either side of a simply loaded beam. This device allows for the evaluation of forces and moments acting on structural components.
