The goal for this part is to test the weight percent solids when the viscosity is changing by a second. Water is slowly added and then the viscosity is checked multiple times to guarantee that the viscosity is as close to 22, 21, 20, 19, and 18 seconds. The amount of water that was added to drop the viscosity down a second was also collected.
Table 6: Results of Weight Percent Solids when diluted to specific Viscosities. 22 21 20 19 18
Trial Visc. % Solid Visc. % Solid Visc. % Solid Visc. % Solid Visc. % Solid
1 21.96 22.91 21.06 22.84 19.94 21.81 18.91 20.50 18.00 17.53
2 22.09 23.30 21.10 22.75 20.03 21.90 19.03 20.47 17.94 17.30
3 22.10 23.32 21.07 22.70 19.98 22.18 18.94 20.40 17.97 17.50
Average 22.05 23.18 21.08 22.76 19.98 21.96 18.96 20.46 17.97 17.44
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Graph 12: Plot of Process Capability for Weight Percent Solids.
Conclusions for Part D (Graphs 7-12):
• Lube density is proportional to viscosity and weight percent solids.
• Temperature will affect the viscosity and weight percent solids. o About halfway through the shift the lube will drop in viscosity from the heat. When the viscosity first drops, the weight percent solids will remain constant. o After the lube remains constant (roughly six hours into the shift), water begins to evaporate causing the viscosity to rise. Once the water begins to evaporate, the weight percent solids begin to rise.
• Except for the beginning of the shift, the viscosity was kept in a nineteen to twenty second shift range. This is the ideal range for production.
• The weight percent solids were consistently in a twenty to twenty-four percent range. As the percent solids dropped closer to twenty percent, undiluted lube was added to stay in
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• Temperature and Viscosity are inversely proportional to each other. o At cooler temperatures the lube will thicken, causing higher viscosities. Higher temperatures will cause a more water like solution, lower viscosity. o As long as the lube is not continuously heated, the weight percent solids will remain constant.
• Lube density is proportional to viscosity and weight percent solids.
• Temperature will affect the viscosity and weight percent solids. o About halfway through the shift the lube will drop in viscosity from the heat. When the viscosity first drops, the weight percent solids will remain constant. o After the lube remains constant (roughly six hours into the shift), water begins to evaporate causing the viscosity to rise. Once the water begins to evaporate, the weight percent solids begin to rise.
• Except for the beginning of the shift, the viscosity was kept in a nineteen to twenty second shift range. This is the ideal range for production.
• The weight percent solids were consistently in a twenty to twenty-four percent range. As the percent solids dropped closer to twenty percent, undiluted lube was added to stay in