Statistical Quality Control Mock Test 5

10%

Question 1 of 10

1. When the process is a complex assembly operation, and the product quality can only be judged in terms of occurrence of nonconformities, the ______ are more helpful.

R-charts

s-charts

Only x Charts

p-charts

Question 1 of 10

Question 2 of 10

2. When there is an interactive effect of processes on the tolerances, process capability can’t be used for the planning of production processes.

True

False

Question 2 of 10

Question 3 of 10

3. How many observations are needed at least, to plot a histogram which gives proper information about the process capability?

120

100

Question 3 of 10

Question 4 of 10

4. When there is a need to reduce acceptance-sampling or other downstream testing to a minimum when the process can be operated in-control, which type of control charts should be preferred?

Variable control chart

Both can be used

None of the both types can be used

Attributes control chart

Question 4 of 10

Question 5 of 10

5. 0.27 percent outside the normal tolerances can be obtained using ____________

8-sigma both sides of mean

3-sigma both sides of mean

2-sigma both sides of mean

6-sigma both sides of mean

Question 5 of 10

Question 6 of 10

6. When it is inconvenient to obtain more than one measurement per sample output of any process, which of these is the best choice?

x bar and s charts

Control charts for individuals

c-charts

x bar and R charts

Question 6 of 10

Question 7 of 10

7. The Class A defects are ____________

Moderate

Serious

Very Serious

Minor

Question 7 of 10

Question 8 of 10

8. What is the value of center line of g-chart when there is no standard given?

\(\bar{t}-3\sqrt{\bar{t}}\)

\(\bar{t}+3\sqrt{\bar{t}}\)

\(\bar{t}+0.5\sqrt{\bar{t}}\)

\(\bar{t}\)

Question 8 of 10

Question 9 of 10

9. Which of these does not require SPC implementation?

When process is stable

When customer demands both control and capability

When Specifications change without notice

When the process is estimated to reduce its capability in near future

Question 9 of 10

Question 10 of 10

10. Which of these is used as the measure of process capability?

Process mean

Six-sigma spread in the distribution of the product quality characteristic

Sample standard deviation

Process standard deviation

Question 10 of 10