1.40 In a ready-mix plant, cylindrical samples are prepared and tested periodically to detect any mix problem and to ensure that the compressive strength is higher than the lower specification limit. The minimum target value was set at 5,000 psi. The following compressive strength data were collected. Sample No. Compressive Strength (psi) Compressive Strength (psi) Sample No. 1 5595 11 6695 5139 12 5449 3 6359 13 5278 4 5192 14 6697 5188 15 5195 6. 5241 16 6021 7 5964 17 5320 8 5875 18 5657 6155 19 6595 10 5115 20 5235 a. Calculate the mean, standard deviation, and the coefficient of variation of the data. b. Using a spreadsheet program, create a control chart for these data showing the target value and the lower specification limit. Is the plant production meeting the specification requirement? If not, comment on possible rea- sons. Comment on the data scatter.

Determine the permanent deformation after 2 hours show all work

A 150mm diameter cylindrical concrete specimen was tested for splitting tensile strength. The Sample failed when the applied force was 120 kN. What is the splitting tensile stress at failure in MPa? The sample length is 300mm

A hot rolled steel tension test sample has a diameter of 6 mm and the original gage length of 30 mm. In a test to fracture, the stress and strain data below were obtained. Determine Generic Strain Value, %0.2 offset strain, and Calculated stress at %0.2 offset. Original diameter - 6mm Original Length - 30 mm Fracture diameter - 4.54 mm