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s of carbon material p on carbon face seals. in equipment such a materials s were tested

s of carbon material p on carbon face seals. in equipment such a materials s were tested

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Answer B, C, D also, not just A.

13-54. O An article in Lubrication Engineering (December 1990) described the results of an experiment designed to inves- tigate the effects of carbon material properties on the progres- sion of blisters on carbon face seals. The carbon face seals are used extensively in equipment such as air turbine starters. Five different carbon materials were tested, and the surface rough- ness was measured. The data are as follows: Carbon Material Type Surface Roughness EC10 0.50 0.55 0.55 0.36 EC10A 0.31 0.07 0.25 0.18 0.56 0.20 EC4 0.20 0.28 0.12 EC1 0.10 0.16 (a) Does carbon material type have an effect on mean surface roughness? Use a = 0.05. (b) Find the residuals for this experiment. Does a normal prob- ability plot of the residuals indicate any problem with the normality assumption? (c) Plot the residuals versus ŷ. Comment on the plot. (d) Find a 95% confidence interval on the difference between mean surface roughness for the EC10 and the EC1 carbon grades.
Transcribed Image Text:13-54. O An article in Lubrication Engineering (December 1990) described the results of an experiment designed to inves- tigate the effects of carbon material properties on the progres- sion of blisters on carbon face seals. The carbon face seals are used extensively in equipment such as air turbine starters. Five different carbon materials were tested, and the surface rough- ness was measured. The data are as follows: Carbon Material Type Surface Roughness EC10 0.50 0.55 0.55 0.36 EC10A 0.31 0.07 0.25 0.18 0.56 0.20 EC4 0.20 0.28 0.12 EC1 0.10 0.16 (a) Does carbon material type have an effect on mean surface roughness? Use a = 0.05. (b) Find the residuals for this experiment. Does a normal prob- ability plot of the residuals indicate any problem with the normality assumption? (c) Plot the residuals versus ŷ. Comment on the plot. (d) Find a 95% confidence interval on the difference between mean surface roughness for the EC10 and the EC1 carbon grades.
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