CE Lab 1docxMicrosoft w De Microsoft Corporation US httpson

CE Lab #1.docx-Microsoft w.. × (De Microsoft Corporation (US) https://onedrive.live.com/view.aspx?ad:00ced625a82368b6&page-view;&resid-CED625A; Q Search Word Online Sign in Mamdudur\'s OneDrive Reports Lab #1 Edit in BrowserB Share - Print Comments.. into place until preloaded. Note that preloading is important, and ask the TA for assistance 7. Repeat steps 4 and 5 Results Hardness #(HRB) st 0 3 Reading 92.2 Average Reading 91.9 Specimen o error ReadingReading 91.6 92.0 10.95 % Aluminum Sample Unknown Sample 102.9 101.8 102.9 102.5 n\'a %Error= ((Standard Value-Experimental Value)/Standard Value) * 100% Analysis 1. The value for Aluminum was obtained 91.9 which has a closer HRB value 82.6. The percent error between the value we obtained and the standard value are so close that they have a fewer than 11% of error which is acceptable. Aluminum which we used in this experiment might be 7000 series aluminum alloy. There may be a little error because of mechanical disadvantage or something ossibl wn 1AISI 4000 Series Steel 2 AISI 8000 Series Steel 96.3 97.2 ow Alloy ensitic PAGE 3 OF 4 HELP IMPROVE OFFICE 100% 9:15 PM 9/5/2016 Ask me anything

Solution

The value 82.6 HRB may be from one of the 7000 aluminium series i.e 7005, 7026, 7050, 7068 or 7075. 7075 has close value which is 87 HRB.

Percentage error formula is already provided. e.g. standard value for aluminium alloy is 82.6. Experimental value is 91.9. This will give 11.25% error. As it is mentioned in the question , there can be little error in the calculation.