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

The purpose of a moment tester is to determine the reactions on either side of a simply loaded beam. It assesses the internal forces and moments in the structure under load.

The tensile test is a procedure where a piece of steel material is subjected to an increasing axial load until failure. During this test, the elongation of the material is measured in relation to the applied load. This helps in determining properties such as yield strength, tensile strength, and ductility.

To read the depth micrometer, we consider:

• The main scale shows a reading of 100 mm.
• The sliding scale shows 11 mm.
• The additional scale shows 0.50 mm.
• Finally, the value from the micro-adjustment shows 0.09 mm.

Thus, the total reading is calculated as: $ext{Reading} = 100 + 11 + 0.50 + 0.09 = 111.59 ext{ mm}$

Another precision measuring tool that can accurately measure the depth of a hole is a vernier caliper.