Process capability calculations make little sense

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Reference no: EM13851614

20 questions. mutiple hoice/true false Question 1 (1 point) Process capability calculations make little sense if the process: Question 1 options: -data were taken over a period of time -is not in statistical control -variations are due to special causes -has control but is not capable Save Question 2 (1 point) In a variable sample size situation--such as when the number of units produced varies--if the sample size in a p-chart increases from 100 to 120, the upper and lower control limits will: Question 2 options: -move farther apart -move closer together -remain the same distance apart -both shift upward Save Question 3 (1 point) Twenty samples of size 6 were collected for a variable measurement. Determine the upper control limit (UCL) and lower control limit (LCL) for an R-chart if the sum of the sample ranges equals 88.0. Question 3 options: UCL = 8.8176, LCL = 0.0000 UCL = 9.3016, LCL = 0.3344 UCL = 13.2000, LCL = 0.0000 UCL = 29.3921, LCL = 0.0000 Save Question 4 (1 point) A(n) _____ is a performance characteristic that is either present or absent in the product or service under consideration. Question 4 options: -variable -control limit -attribute -performance range Save Question 5 (1 point) Control limits relate to _____, while specification limits relate to individual measurements. Question 5 options: -values within the upper and lower control limits -total values in the range -median values -averages of samples Save Question 6 (1 point) An alternative to using the R-chart is the: Question 6 options: np-chart s-chart c-chart p-chart Save Question 7 (1 point) The sample size for an x-chart: Question 7 options: -should be greater than or equal to 30 -is larger than that for an Xbar-chart -is equal to one -depends on the number of measurements taken Save Question 8 (1 point) Which of the following is NOT an indication of an out-of-control process? Question 8 options: -Five consecutive points fall on one side of the center line -Four of five consecutive points fall within the outer two-thirds region between the center line and one of the control limits -Two of three consecutive points fall in the outer one-third region between the center line and one of the control limits -A single point falls above the upper control limit Save Question 9 (1 point) A precision parts manufacturer produces bolts for use in military aircraft. The specifications for bolt length are 37.50 0.25 cm. The company has established an Xbar-chart and an R-chart using samples of size five. The centerlines for the Xbar-chart and R-chart are set at 37.65 cm and 1.03 cm, respectively. What is the value of Cpk for this process? Question 9 options: 0.08 0.28 0.75 0.03 Save Question 10 (1 point) Short repeated patterns in a control chart, with alternating high peaks and low valleys, are known as: Question 10 options: -trends -cycles -spikes -reciprocals Save Question 11 (1 point) Which of the following pairs of charts are used together? Question 11 options: Xbar-chart and p-chart R-chart and p-chart R-chart and s-chart Xbar-chart and R-chart Save Question 12 (1 point) In pre-control, which zone covers the nominal dimension? Question 12 options: -Gray zone -Yellow zone -Red zone -Green zone Save Question 13 (1 point) Statistical process control relies on _____. Question 13 options: -capability models -variance analyses -control charts -conformance reports Save Question 14 (1 point) Which of the following charts is used to monitor the total number of defects per unit when a constant subgroup size is employed? Question 14 options: s-chart c-chart p-chart u-chart Save Question 15 (1 point) Collecting _____ data is usually easier than collecting _____ data because the assessment can usually be done more quickly by a simple inspection or count. Question 15 options: -attribute; variable -concrete; continuous -random; discrete -simple; continuous Save -------------------------------------------------------------------------------- Question 16 (1 point) When using a control chart -- one rule of thumb is to have a minimum of 25 data points--preferable 40 or more. Question 16 options: True False Save Question 17 (1 point) When the R-chart is not in control (has a signal), you should not investigate signals found in the related Xbar chart. Question 17 options: True False Save Question 18 (1 point) Before control charts can be used to identify the presence of special causes on line, the process must be brought into a state of statistical control; that is, the data used to establish the charts and define the control limits must be subject only to a constant system of common causes. Question 18 options: True False Save Question 19 (1 point) A scatter diagram can help identify possible relationship patterns and the dispersion around those patterns Question 19 options: True False Save Question 20 (1 point) A flow chart can help document the product stream (rational ample) associated with the data plotted in a control chart. Question 20 options: True False Save

Reference no: EM13851614

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