Question 1

If points on a control chart are determined to be the result of special causes,the points should be eliminated and new control limit values should be computed.

Accepted Answer

A) True 
 B)False

Question 2

The sample size for an x-chart:

Accepted Answer

A) should be greater than or equal to 30. 
B) is larger than that for an   -chart. 
C) is equal to one. 
D) depends on the number of measurements taken. 
A) should be greater than or equal to 30. 
B) is larger than that for an   -chart. 
C) is equal to one. 
D) depends on the number of measurements taken.

Question 3

For statistical process control,a good sampling method should always:

Accepted Answer

A) require frequent sampling. 
B) minimize sampling cost. 
C) maximize sample size. 
D) use rational sub-groups. 
A) require frequent sampling. 
B) minimize sampling cost. 
C) maximize sample size. 
D) use rational sub-groups.

Question 4

A machined part has a lower tolerance limit of 3.5 inches and an upper tolerance limit of 3.9 inches.The range for the pre-control green zone is:

Accepted Answer

A) 3.5 to 3.9 inches. 
B) 3.7 inches to 3.9 inches. 
C) less than 3.5 inches. 
D) 3.6 inches to 3.8 inches. 
A) 3.5 to 3.9 inches. 
B) 3.7 inches to 3.9 inches. 
C) less than 3.5 inches. 
D) 3.6 inches to 3.8 inches.

Question 5

The _____ is used to monitor the centering of the process.

Accepted Answer

A)    -chart 
B)  R-chart 
C)  p-chart 
D)  np-chart 
A)    -chart 
B)  R-chart 
C)  p-chart 
D)  np-chart

Question 6

Coils of synthetic rope are monitored for defects.Each coil contains 1,200 feet of rope.Eighteen coils were selected and the number of defects found in each coil is presented below.Identify an appropriate control chart and determine the chart's control limits.

Accepted Answer

Use a c-chart.
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Question 7

In an   -chart,the upper control limit is equal to the overall sample mean plus three times the:

Accepted Answer

A) process standard deviation. 
B) average range. 
C) standard error of the mean. 
D) sample variance. 
A) process standard deviation. 
B) average range. 
C) standard error of the mean. 
D) sample variance.

Question 8

Because of high test costs,a single sample of wastewater sludge is tested daily for dissolved oxygen content.The appropriate control chart method is:

Accepted Answer

A)    -chart and R-chart. 
B) u-chart. 
C) x-chart and moving range chart. 
D) x-chart and R-chart. 
A)    -chart and R-chart. 
B) u-chart. 
C) x-chart and moving range chart. 
D) x-chart and R-chart.

Question 9

Process capability calculations make little sense if the process:

Accepted Answer

A) data were taken over a period of time. 
B) is not in statistical control. 
C) variations are due to special causes. 
D) has control but is not capable. 
A) data were taken over a period of time. 
B) is not in statistical control. 
C) variations are due to special causes. 
D) has control but is not capable.

Question 10

Determine the sample standard deviation for the following sample data: 7,9,2,0,1,and 5.

Accepted Answer

A) 3.347 
B) 3.266 
C) 2.993 
D) 3.578 
A) 3.347 
B) 3.266 
C) 2.993 
D) 3.578

Question 11

Which of the following is a likely cause of the control chart pattern known as a "trend?"

Accepted Answer

A) Aging equipment 
B) Change in setup method 
C) New operator 
D) A mixture of two materials 
A) Aging equipment 
B) Change in setup method 
C) New operator 
D) A mixture of two materials

Question 12

Define the term statistical process control.Outline the steps for setting up a control chart to monitor a process and determine its process capability.

Accepted Answer

Statistical process control (SPC)is a me

Question 13

The assumption of normality of observations is more critical fo   -charts than for x-charts.

Accepted Answer

A) True 
 B)False

Question 14

Compared to variable inspection,attributes inspection requires _____ to obtain the same amount of statistical information about the quality of the product.

Accepted Answer

A) a more distributed population 
B) a larger range of variance 
C) a larger sample 
D) a smaller sample 
A) a more distributed population 
B) a larger range of variance 
C) a larger sample 
D) a smaller sample

Question 15

Which of the following would be used to monitor the number of nonconforming items?

Accepted Answer

A) np-chart 
B) p-chart 
C) u-chart 
D) n-chart 
A) np-chart 
B) p-chart 
C) u-chart 
D) n-chart

Question 16

A delivery company defines a "defect" as a package delivered later than the promised delivery time.Management wants to monitor the proportion of packages per week delivered beyond their promised delivery time.Management plans to sample 150 packages per week.The appropriate control chart is a(n):

Accepted Answer

A)    -chart. 
B)  R-chart. 
C)  p-chart. 
D)  np-chart. 
A)    -chart. 
B)  R-chart. 
C)  p-chart. 
D)  np-chart.

Question 17

If the variation in the process is due to common causes alone,the process is said to be:

Accepted Answer

A) out of control. 
B) in statistical control. 
C) in controlled variance. 
D) within capability. 
A) out of control. 
B) in statistical control. 
C) in controlled variance. 
D) within capability.

Question 18

A(n)_____ is a performance characteristic that is either present or absent in the product or service under consideration.

Accepted Answer

A) variable 
B) control limit 
C) attribute 
D) performance range 
A) variable 
B) control limit 
C) attribute 
D) performance range

Question 19

Control limits relate to _____,while specification limits relate to individual measurements.

Accepted Answer

A) values within the upper and lower control limits 
B) total values in the range 
C) median values 
D) averages of samples 
A) values within the upper and lower control limits 
B) total values in the range 
C) median values 
D) averages of samples

Question 20

If the sample size in a p-chart increases from 100 to 120,the upper and lower control limits will:

Accepted Answer

A) move farther apart. 
B) move closer together. 
C) remain the same distance apart. 
D) both shift upward. 
A) move farther apart. 
B) move closer together. 
C) remain the same distance apart. 
D) both shift upward.

If points on a control chart are determined to be the result of special causes,the points should be eliminated and new control limit values should be computed.

The sample size for an x-chart:

For statistical process control,a good sampling method should always:

A machined part has a lower tolerance limit of 3.5 inches and an upper tolerance limit of 3.9 inches.The range for the pre-control green zone is:

The _____ is used to monitor the centering of the process.

Coils of synthetic rope are monitored for defects.Each coil contains 1,200 feet of rope.Eighteen coils were selected and the number of defects found in each coil is presented below.Identify an appropriate control chart and determine the chart's control limits.

In an -chart,the upper control limit is equal to the overall sample mean plus three times the:

Because of high test costs,a single sample of wastewater sludge is tested daily for dissolved oxygen content.The appropriate control chart method is:

Process capability calculations make little sense if the process:

Determine the sample standard deviation for the following sample data: 7,9,2,0,1,and 5.

Which of the following is a likely cause of the control chart pattern known as a "trend?"

Define the term statistical process control.Outline the steps for setting up a control chart to monitor a process and determine its process capability.

The assumption of normality of observations is more critical fo -charts than for x-charts.

Compared to variable inspection,attributes inspection requires _____ to obtain the same amount of statistical information about the quality of the product.

Which of the following would be used to monitor the number of nonconforming items?

A delivery company defines a "defect" as a package delivered later than the promised delivery time.Management wants to monitor the proportion of packages per week delivered beyond their promised delivery time.Management plans to sample 150 packages per week.The appropriate control chart is a(n):

If the variation in the process is due to common causes alone,the process is said to be:

A(n)_____ is a performance characteristic that is either present or absent in the product or service under consideration.

Control limits relate to _____,while specification limits relate to individual measurements.

If the sample size in a p-chart increases from 100 to 120,the upper and lower control limits will:

Introduction

Total Quality In Organizations

Philosophies And Frameworks

Strategic Focus For Performance Excellence

Focusing On Customers

High Performance Workforce Management

Process Management

Performance Measurement And Information Management

Leading, building, and Sustaining Performance Excellence

Statistical Thinking And Applications

Six Sigma And Process Improvement

Design For Quality And Product Excellence

Filters

Exam 13: Statistical Process Control

If points on a control chart are determined to be the result of special causes,the points should be eliminated and new control limit values should be computed.

The sample size for an x-chart:

For statistical process control,a good sampling method should always:

A machined part has a lower tolerance limit of 3.5 inches and an upper tolerance limit of 3.9 inches.The range for the pre-control green zone is:

The _____ is used to monitor the centering of the process.

Coils of synthetic rope are monitored for defects.Each coil contains 1,200 feet of rope.Eighteen coils were selected and the number of defects found in each coil is presented below.Identify an appropriate control chart and determine the chart's control limits.

In an -chart,the upper control limit is equal to the overall sample mean plus three times the:

Because of high test costs,a single sample of wastewater sludge is tested daily for dissolved oxygen content.The appropriate control chart method is:

Process capability calculations make little sense if the process:

Determine the sample standard deviation for the following sample data: 7,9,2,0,1,and 5.

Which of the following is a likely cause of the control chart pattern known as a "trend?"

Define the term statistical process control.Outline the steps for setting up a control chart to monitor a process and determine its process capability.

The assumption of normality of observations is more critical fo -charts than for x-charts.

Compared to variable inspection,attributes inspection requires _____ to obtain the same amount of statistical information about the quality of the product.

Which of the following would be used to monitor the number of nonconforming items?

A delivery company defines a "defect" as a package delivered later than the promised delivery time.Management wants to monitor the proportion of packages per week delivered beyond their promised delivery time.Management plans to sample 150 packages per week.The appropriate control chart is a(n):

If the variation in the process is due to common causes alone,the process is said to be:

A(n)_____ is a performance characteristic that is either present or absent in the product or service under consideration.

Control limits relate to _____,while specification limits relate to individual measurements.

If the sample size in a p-chart increases from 100 to 120,the upper and lower control limits will:

Introduction

Total Quality In Organizations

Philosophies And Frameworks

Strategic Focus For Performance Excellence

Focusing On Customers

High Performance Workforce Management

Process Management

Performance Measurement And Information Management

Leading, building, and Sustaining Performance Excellence

Statistical Thinking And Applications

Six Sigma And Process Improvement

Design For Quality And Product Excellence

Filters