Question 1

When a process is not centered, its capability is measured in a slightly different way. The symbol for this case is Cpk.

Accepted Answer

A) True 
 B)False  True

Question 2

If a point on a control chart falls outside one of the control limits, this suggests that the process output is nonrandom and should be investigated.

Accepted Answer

A) True 
 B)False

Question 3

A time-ordered plot of sample statistics is called a(n) _____ chart.

Accepted Answer

A)  statistical
B)  inspection
C)  control
D)  simo
E)  limitF) A) and B)
G) A) and C)

Question 4

Attributes need to be measured, whereas variable data can be counted.

Accepted Answer

A) True 
 B)False

Question 5

Acceptance sampling, when it is used, is used
(I) before production.(II) during production.(III) after production.

Accepted Answer

A)  I only
B)  I and III only
C)  I and II only
D)  II and III only
E)  I, II, and IIIF) A) and B)
G) B) and E)

Question 6

A control chart used to monitor the number of defects per unit is the

Accepted Answer

A)  p-chart.
B)  R-chart.
C)  x-bar chart.
D)  c-chart.
E)  Gantt chart.F) C) and D)
G) None of the above

Question 7

Tolerances represent the control limits we use on the charts.

Accepted Answer

A) True 
 B)False

Question 8

The purpose of control charts is to

Accepted Answer

A)  estimate the proportion of output that is acceptable.
B)  weed out defective items.
C)  determine if the output is within tolerances/specifications.
D)  distinguish between random variation and assignable variation in the process.
E)  provide meaningful work for quality inspectors.F) A) and B)
G) B) and D)

Question 9

Inspection is a(n) _____ activity.

Accepted Answer

A)  prevention.
B)  capability analysis.
C)  flawless
D)  corrective.
E)  appraisal.F) D) and E)
G) A) and B)

Question 10

A design engineer wants to construct a sample mean chart for controlling the service life of a halogen headlamp his company produces. He knows from numerous previous samples that this service life is normally distributed with a mean of 500 hours and a standard deviation of 20 hours. On three recent production batches, he tested service life on random samples of four headlamps, with these results

What is the standard deviation of the sampling distribution of sample means for whenever service life is in control?

Accepted Answer

A)  5 hours
B)  6.67 hours
C)  10 hours
D)  11.55 hours
E)  20 hoursF) B) and C)
G) C) and E)

Question 11

A quality analyst wants to construct a control chart for determining whether three machines, all producing the same product, are in control with regard to a particular quality variable. Accordingly, he sampled four units of output from each machine, with the following results

What is the sample mean for machine #1?

Accepted Answer

A)  15
B)  16
C)  17
D)  21
E)  23F) None of the above
G) A) and D)

Question 12

Control limits are based on multiples of the process standard deviation.

Accepted Answer

A) True 
 B)False

Question 13

A process results in a few defects occurring in each unit of output. Long-run, these defects should be monitored with

Accepted Answer

A)  p-charts.
B)  c-charts.
C)  x-bar charts.
D)  R-charts.
E)  o-charts.F) C) and D)
G) B) and E)

Question 14

Approving the effort that occurs during the production process is known as acceptance sampling.

Accepted Answer

A) True 
 B)False

Question 15

Range charts and p-charts are both used for variable data.

Accepted Answer

A) True 
 B)False  False

Question 16

Statistical process control charts are not really used to fix quality so much as they are used to

Accepted Answer

A)  highlight when processes are not capable.
B)  point out when random variation is present.
C)  alert when corrective action is needed.
D)  monitor the quality of incoming shipments or outgoing finished goods.
E)  initiate team-building exercises.F) A) and C)
G) All of the above

Question 17

The purpose of statistical process control is to ensure that historical output is random.

Accepted Answer

A) True 
 B)False

Question 18

The traditional view is that the optimum level of inspection occurs when we catch at least 98.6 percent of the defects.

Accepted Answer

A) True 
 B)False

Question 19

Consider the following information

The number of runs above and below the sample median is:

Accepted Answer

A)  3.
B)  4.
C)  5.
D)  6.
E)  none of these.F) D) and E)
G) B) and C)

Question 20

The specification limits for a product are 8 cm and 10 cm. A process that produces the product has a mean of 9.5 cm and a standard deviation of 0.2 cm. What is the process capability, Cpk?

Accepted Answer

A)  3.33
B)  1.67
C)  0.83
D)  2.50
E)  1.33F) A) and C)
G) A) and D) C

Exam 10: Quality Control

When a process is not centered, its capability is measured in a slightly different way. The symbol for this case is C_pk.

Correct Answer
verified
True

If a point on a control chart falls outside one of the control limits, this suggests that the process output is nonrandom and should be investigated.

Correct Answer
verified

A time-ordered plot of sample statistics is called a(n) _____ chart.

Correct Answer
verified

Attributes need to be measured, whereas variable data can be counted.

Correct Answer
verified

Acceptance sampling, when it is used, is used (I) before production.(II) during production.(III) after production.

Correct Answer
verified

A control chart used to monitor the number of defects per unit is the

Correct Answer
verified

Tolerances represent the control limits we use on the charts.

Correct Answer
verified

The purpose of control charts is to

Correct Answer
verified

Inspection is a(n) _____ activity.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Control limits are based on multiples of the process standard deviation.

Correct Answer
verified

A process results in a few defects occurring in each unit of output. Long-run, these defects should be monitored with

Correct Answer
verified

Approving the effort that occurs during the production process is known as acceptance sampling.

Correct Answer
verified

Range charts and p-charts are both used for variable data.

Correct Answer
verified
False

Statistical process control charts are not really used to fix quality so much as they are used to

Correct Answer
verified

The purpose of statistical process control is to ensure that historical output is random.

Correct Answer
verified

The traditional view is that the optimum level of inspection occurs when we catch at least 98.6 percent of the defects.

Correct Answer
verified

Consider the following information The number of runs above and below the sample median is:

Correct Answer
verified

The specification limits for a product are 8 cm and 10 cm. A process that produces the product has a mean of 9.5 cm and a standard deviation of 0.2 cm. What is the process capability, C_pk?

Correct Answer
verified
C

Exam 10: Quality Control

When a process is not centered, its capability is measured in a slightly different way. The symbol for this case is Cpk.

Correct AnswerverifiedTrue

If a point on a control chart falls outside one of the control limits, this suggests that the process output is nonrandom and should be investigated.

Correct AnswerverifiedShow Answer

A time-ordered plot of sample statistics is called a(n) _____ chart.

Correct AnswerverifiedShow Answer

Attributes need to be measured, whereas variable data can be counted.

Correct AnswerverifiedShow Answer

Acceptance sampling, when it is used, is used (I) before production.(II) during production.(III) after production.

Correct AnswerverifiedShow Answer

A control chart used to monitor the number of defects per unit is the

Correct AnswerverifiedShow Answer

Tolerances represent the control limits we use on the charts.

Correct AnswerverifiedShow Answer

The purpose of control charts is to

Correct AnswerverifiedShow Answer

Inspection is a(n) _____ activity.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Control limits are based on multiples of the process standard deviation.

Correct AnswerverifiedShow Answer

A process results in a few defects occurring in each unit of output. Long-run, these defects should be monitored with

Correct AnswerverifiedShow Answer

Approving the effort that occurs during the production process is known as acceptance sampling.

Correct AnswerverifiedShow Answer

Range charts and p-charts are both used for variable data.

Correct AnswerverifiedFalse

Statistical process control charts are not really used to fix quality so much as they are used to

Correct AnswerverifiedShow Answer

The purpose of statistical process control is to ensure that historical output is random.

Correct AnswerverifiedShow Answer

The traditional view is that the optimum level of inspection occurs when we catch at least 98.6 percent of the defects.

Correct AnswerverifiedShow Answer

Consider the following information The number of runs above and below the sample median is:

Correct AnswerverifiedShow Answer

The specification limits for a product are 8 cm and 10 cm. A process that produces the product has a mean of 9.5 cm and a standard deviation of 0.2 cm. What is the process capability, Cpk?

Correct AnswerverifiedC

When a process is not centered, its capability is measured in a slightly different way. The symbol for this case is C_pk.

Correct Answer
verified
True

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
verified
False

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The specification limits for a product are 8 cm and 10 cm. A process that produces the product has a mean of 9.5 cm and a standard deviation of 0.2 cm. What is the process capability, C_pk?

Correct Answer
verified
C