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Six Sigma Green Belt

Part One:

Multiple Choices:

1. The primary purpose of a control chart is to

a. Set Specifications and tolerances

b. Compare operations.

c. Determine the stability of a process.

d. Accept or reject a lot of material

2. When a control chart is used on a new process, capability can be assessed at which of the following

times?

a. Before the chart is first started

b. After the first ten points are plotted

c. When the plotted points hug the centerline

d. After the process is shown to be in control

3. Precision is best described as

a. A comparison to a known standard

b. The achievement of expected outgoing quality

c. The repeated consistency of results

d. The difference between an average measurement and the actual value

4. The overall ability of two or more operators to obtain consistent results repeatedly when measuring

the same set of parts and using the same measuring equipment is the definition of

a. Repeatability

b. Precision

c. Reproducibility

d. Accuracy

5. Which of the following conditions must be met for a process to be in a state of statistical control?

a. Most of the product out by the process is in specification.

b. All subgroup averages and rang are within control limits.

c. All variation has been completely removed

d. Previously optimal process settings are used.

6. Which of the following measures of dispersion is equal to the sum of deviations from the mean

squared divided by the sample size?

a. Range

b. Standard deviation

c. Variance

d. Mode

7. An X and R chart is used to

a. Indicate process variation

b. Specify design Limits

c. Interpret costs

d. Identify customer expectations

8. Which of the following is the most useful graphical tool for promoting and understanding the process

of capability?

a. A flowchart

b. A histogram

c. An affinity diagram

d. An Ishikawa diagram

9. The type of chart that presents the value of items in descending order is a

a. Histogram

b. Pareto chart

c. U chart

d. Cusum chart