Question 1

Common cause random)variation provides evidence that the process is not in control.

Accepted Answer

A) True 
 B)False

Question 2

Defect and defective mean the same thing for attribute qualitative)control charts.

Accepted Answer

A) True 
 B)False

Question 3

An R-chart monitors the robustness of a process.

Accepted Answer

A) True 
 B)False

Question 4

One reason some companies fail in their attempt to apply statistical process control is lack of training.

Accepted Answer

A) True 
 B)False

Question 5

If a sample of 40units of output found 500 defects,then the 3-sigma upper control limit for the   Chart would be

Accepted Answer

A) 12.5 
B) 23.11 
C) 37.5 
D) 75.0 
A) 12.5 
B) 23.11 
C) 37.5 
D) 75.0

Question 6

Four common types of control charts include all of the following EXCEPT:

Accepted Answer

A) xbar-chart 
B) t-chart 
C) p-chart 
D) c-chart 
A) xbar-chart 
B) t-chart 
C) p-chart 
D) c-chart

Question 7

A process is generally considered to be in control when

Accepted Answer

A) there are no sample points outside the control limits 
B) most points are near the center line,without many being close to the control limits 
C) sample points are randomly distributed equally above and below the center line 
D) all of the above are true 
A) there are no sample points outside the control limits 
B) most points are near the center line,without many being close to the control limits 
C) sample points are randomly distributed equally above and below the center line 
D) all of the above are true

Question 8

If the quality of a process's output is determined by the number of defects within a small sample,use an)_______ control chart.

Accepted Answer

A) xbar 
B) R 
C) c 
D) p 
A) xbar 
B) R 
C) c 
D) p

Question 9

The range measures the variation within samples versus the variation between samples.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following control charts is used to control the variation within samples?

Accepted Answer

A) xbar 
B) R 
C) c 
D) p. 
A) xbar 
B) R 
C) c 
D) p.

Question 11

Tolerances reflect the amount of common cause variation allowed in a process.

Accepted Answer

A) True 
 B)False

Question 12

A company manufactures a product that has a design nominal)target width of 5 inches with tolerances of   inch.The process that produces the product has a mean of 4.995 inches and a standard deviation of 0.01 inch.The process capability ratio for this process is

Accepted Answer

A) -1.67 
B) -1.5 
C) 1.5 
D) 1.67 
A) -1.67 
B) -1.5 
C) 1.5 
D) 1.67

Question 13

For the process to be capable of meeting design specification the process capability index must be

Accepted Answer

A) less than one 1.0) 
B) equal to or greater than one 1.0) 
C) smaller than Six Sigma 
D) larger than Six Sigma 
A) less than one 1.0) 
B) equal to or greater than one 1.0) 
C) smaller than Six Sigma 
D) larger than Six Sigma

Question 14

Control charts visually show when a process is not within statistical control limits.

Accepted Answer

A) True 
 B)False

Question 15

A control chart that uses the actual number of defects per item to monitor a process is known as a

Accepted Answer

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

Question 16

Statistical process control can prevent poor quality before it occurs if a pattern is evident in the plotted points.

Accepted Answer

A) True 
 B)False

Question 17

Design specification limits should always be wider than the control limits for a given process.

Accepted Answer

A) True 
 B)False

Question 18

When constructing a control chart for the first time,all points should be within the control limits indicating the process is in control.

Accepted Answer

A) True 
 B)False

Question 19

A control chart is in control when the plot of the sample points exhibits a pattern.

Accepted Answer

A) True 
 B)False

Question 20

A company produces a product which is designed to weigh 10 oz. ,with a tolerance of   oz.The process produces products with an average weight of 9.95 oz.and a standard deviation of 0.10 oz.The process capability ratio for this process is with z = 3.

Accepted Answer

A) 1.67 
B) 0 
C) 0.8333 
D) -1.67 
A) 1.67 
B) 0 
C) 0.8333 
D) -1.67

Exam 3: Statistical Quality Control

Common cause random)variation provides evidence that the process is not in control.

Defect and defective mean the same thing for attribute qualitative)control charts.

An R-chart monitors the robustness of a process.

One reason some companies fail in their attempt to apply statistical process control is lack of training.

If a sample of 40units of output found 500 defects,then the 3-sigma upper control limit for the Chart would be

Four common types of control charts include all of the following EXCEPT:

A process is generally considered to be in control when

If the quality of a process's output is determined by the number of defects within a small sample,use an)_______ control chart.

The range measures the variation within samples versus the variation between samples.

Which of the following control charts is used to control the variation within samples?

Tolerances reflect the amount of common cause variation allowed in a process.

A company manufactures a product that has a design nominal)target width of 5 inches with tolerances of inch.The process that produces the product has a mean of 4.995 inches and a standard deviation of 0.01 inch.The process capability ratio for this process is

For the process to be capable of meeting design specification the process capability index must be

Control charts visually show when a process is not within statistical control limits.

A control chart that uses the actual number of defects per item to monitor a process is known as a

Statistical process control can prevent poor quality before it occurs if a pattern is evident in the plotted points.

Design specification limits should always be wider than the control limits for a given process.

When constructing a control chart for the first time,all points should be within the control limits indicating the process is in control.

A control chart is in control when the plot of the sample points exhibits a pattern.

A company produces a product which is designed to weigh 10 oz. ,with a tolerance of oz.The process produces products with an average weight of 9.95 oz.and a standard deviation of 0.10 oz.The process capability ratio for this process is with z = 3.

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