Question

1. Which of the following charts is used to monitor the average number of defects per unit when subgroup sizes are variable? (A) Moving range chart (B) C-chart (C) P-chart (D) U-chart 2. Which of the following is not true regarding control charts? (A) Control charts can be used to monitor a process for the existence of special cause variation (B) The major components of a control chart are the lower control limits, the center line, and the upper control limits (C) Control charts alone can determine the source of problems (D) Control charts are similar to run charts in that data is plotted versus time. 3. Twenty-five samples of size 30 were collected and a total of 48 nonconforming items were found. The three-sigma upper control limit for a $np$-chart would be (A) 0.198 (B) 5.942 (C) 5.211 (D) 0.223 4. A Process has a $C_p$ equal to 2.5. Determine the standard deviation of the process if the design specifications are 16.08 inches plus or minus 0.42 inches. (A) 0.040 (B) 0.056 (C) 0.028 (D) 0.084 5. If $C_p = C_{pk}$, the process is centered at the midpoint of the specifications (A) True (B) False

          1. Which of the following charts is used to monitor the average number of defects per unit when
subgroup sizes are variable?
(A) Moving range chart
(B) C-chart
(C) P-chart
(D) U-chart
2. Which of the following is not true regarding control charts?
(A) Control charts can be used to monitor a process for the existence of special cause variation
(B) The major components of a control chart are the lower control limits, the center line, and
the upper control limits
(C) Control charts alone can determine the source of problems
(D) Control charts are similar to run charts in that data is plotted versus time.
3. Twenty-five samples of size 30 were collected and a total of 48 nonconforming items were found.
The three-sigma upper control limit for a $np$-chart would be
(A) 0.198
(B) 5.942
(C) 5.211
(D) 0.223
4. A Process has a $C_p$ equal to 2.5. Determine the standard deviation of the process if the design
specifications are 16.08 inches plus or minus 0.42 inches.
(A) 0.040
(B) 0.056
(C) 0.028
(D) 0.084
5. If $C_p = C_{pk}$, the process is centered at the midpoint of the specifications
(A) True
(B) False

1. Which of the following charts is used to monitor the average number of defects per unit when
subgroup sizes are variable?
(A) Moving range chart
(B) C-chart
(C) P-chart
(D) U-chart
2. Which of the following is not true regarding control charts?
(A) Control charts can be used to monitor a process for the existence of special cause variation
(B) The major components of a control chart are the lower control limits, the center line, and
the upper control limits
(C) Control charts alone can determine the source of problems
(D) Control charts are similar to run charts in that data is plotted versus time.
3. Twenty-five samples of size 30 were collected and a total of 48 nonconforming items were found.
The three-sigma upper control limit for a np-chart would be
(A) 0.198
(B) 5.942
(C) 5.211
(D) 0.223
4. A Process has a Cp equal to 2.5. Determine the standard deviation of the process if the design
specifications are 16.08 inches plus or minus 0.42 inches.
(A) 0.040
(B) 0.056
(C) 0.028
(D) 0.084
5. If Cp = Cpk, the process is centered at the midpoint of the specifications
(A) True
(B) False

Added by Justin J.

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