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The Rockwell hardness testing method typically uses certain amounts of load. Which of the following is not one of the loads used?(a) 150kg(b) 60kg(c) 5kg(d) 100kgI got this question during an online interview.My doubt is from Aircraft Materials in chapter Testing Aircraft Materials of Aerospace Materials & Processes

Answer»

Right choice is (c) 5kg

The best I can explain: The loads being APPLIED in the ROCKWELL HARDNESS method usually on the penetrator(steel ball or DIAMOND cone) being used and the test specimen. The loads applied are typically 100kg, 150kg and 60KG.



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