1. Two samples of a low hardness steel were tested using aRockwell C hardness tester and the Rockwell B scale at the same labon the same day. The difference between the average hardness of thetwo samples was 0.5 Rockwell C. Do you think there is a significantdifference in the hardness? Justify your answer.
2. Two manufacturers produce a steel. Manufacturer B claimstheir steel is better than manufacturer A because their averageRockwell B hardness is 68.4 HRBW while that of manufacturer B is60.5 HRBW. Do you think there is a significant difference in theirhardness? Justify your answer. Hint: Use the specification!!
3. Find an important engineering failure that involves some ofthe topics discussed in MSE 350. Describe the failure, why itoccurred, the damage (human, environmental, and economic) and thechanges that could have been made in the design to avoid thefailure. Was the failure caused by lack of engineering knowledge atthe time, engineering error, or management/government error?Discuss!!
4.
For each of the following common items, identify what they arecommonly made of, the material type (composite, metal,semiconductor, polymer , ceramic, glass. Describe why that material type isused. Include at least two references for your answers (websitesare fine, but try and find good ones). If more than one materialtype is used in the items, include them all! Be careful to useproper engineering vocabulary when answering this question!
Abrasives for grinding metal
Automobiles
Integrated circuits
Airplanes
Bridges
Solar panels
Latex paint
Soda bottles
Polyvinylchloride (PVC) plumbing pipes
