## determine the minimum sample size for the control chart with 3-sigma limits for which the average run length is less than or equal to 5.

A control chart with 3-sigma limits is to be established for the fraction nonconforming

using a centre line of ?? = 0.1.

a) If the process mean shifts to ??1= 0.2, what sample size is required if we wish to detect

this shift on the next sample following the shift with probability at least 0.5, and

have the lower control limit positive? Use Poisson tables if normal approximation is

not good.

b) For the shift to ??1, determine the minimum sample size for the control chart with

3-sigma limits for which the average run length is less than or equal to 5.

### Determine the outlet concentration x1 in the water solution and in the trichloroethane solution using an analytical equation.

Predicting Extraction for an Existing Tower with a Given Number of Steps. An existing tower contains 5.0 theoretical steps. It is desired to predict its performance under the following conditions….

### Calculate the minimum solvent that can be used. [Hint: In this case, the tie line through the feed L0 represents the condition for minimum solvent flow rate.

Minimum Solvent and Countercurrent Extraction of Acetone. An aqueous feed solution of 1000 kg/h containing 23.5 wt % acetone and 76.5 wt % water is being extracted in a countercurrent….

### Determine the break-point time, the fraction of total capacity used up to the break point, the length of the unused bed, and the saturation loading capacity of the solid.

Drying of Nitrogen and Scale-Up of a Column. Using molecular sieves, water vapor was removed from nitrogen gas in a packed bed (C1) at 28.3°C. The column height was 0.268….