QUIZ-Process capability calculations make little sense if the process:

Quiz
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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
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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
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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
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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
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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
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Question 6 (1 point)

An alternative to using the R-chart is the:
Question 6 options:

np-chart

s-chart

c-chart

p-chart
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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
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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
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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
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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
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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
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Question 12 (1 point)

In pre-control, which zone covers the nominal dimension?
Question 12 options:

-Gray zone

-Yellow zone

-Red zone

-Green zone
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Question 13 (1 point)

Statistical process control relies on _____.
Question 13 options:

-capability models

-variance analyses

-control charts

-conformance reports
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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
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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
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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
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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
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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
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Question 19 (1 point)

A scatter diagram can help identify possible relationship
patterns and the dispersion around those patterns
Question 19 options:

True

False
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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
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