Determine the carburizing time necessary to achieve a carbon concentration of 0.45 wt% at a position 2-mm into a steel alloy that initially contains 0.20 wt% carbon.The surface concentration is to be maintained at 1.30 wt% at 1000℃.Use table 5-4 for error function values as needed.

8

Draw a diagram of the industrial sugar evaporation process in a multiple effect evaporator and explain its operation.

4. Polyethylene (HDPE) pipe is used as a strut in a crutch 22 mm assembly. The pipe generally prepared by extrusion followed by external cooling. The attached figure is a plot of variation of density through a PE pipe. a.) What is the % 958- 956 954 1952 bore pipe wall Outside Density (kg m 3)