Statistical Quality Control Mock Test 9

10%

Question 1 of 10

1. The approach of using a x chart to monitor the fraction of nonconforming units or the fraction of the units exceeding the specifications, is called the ___________

Cusum charts

EWMA charts

Shewhart control charts

Acceptance control charts

Question 1 of 10

Question 2 of 10

2. When n, γ, and β are specified, the values of control limits are between ________

LSL And μ_U

μ_L And USL

μ_L And μ_U

μ_L And LSL

Question 2 of 10

Question 3 of 10

3. The term M_i, which is used in the expression of the standard variable used in standardized x bar charts for short production runs, is defined as ___________

Exponentially weighted moving average

Moving average

Average of original mean measurements

Average of averages of standard deviations

Question 3 of 10

Question 4 of 10

4. Who was the first person to study the effect of the number of subgroups used for x bar and R chart control limit calculation on the false alarm rate?

Robertson

Hillier

Ricardo

Wang

Question 4 of 10

Question 5 of 10

5. ____________ sigma limits are recommended for modified control charts.

Question 5 of 10

Question 6 of 10

6. The standardized control chart approach for short production runs can only be applied on variable control charts.

True

False

Question 6 of 10

Question 7 of 10

7. What is the value of the LCL of the acceptance control chart when sample size n and the fraction nonconforming for 1-β probability of rejection are specified?

\(LCL=LSL-\left(Z_γ-\frac{Z_β}{\sqrt{n}}\right)\)

\(LCL=LSL+\left(Z_γ+\frac{Z_β}{\sqrt{n}}\right)\)

\(LCL=LSL-\left(Z_γ+\frac{Z_β}{\sqrt{n}}\right)\)

\(LCL=LSL+\left(Z_γ-\frac{Z_β}{\sqrt{n}}\right)\)

Question 7 of 10

Question 8 of 10

8. Which of these is eliminated by the self starting approach?

Phase II parameter estimation phase

Phase I parameter measurement phase

Phase I parameter estimation phase

Phase II parameter measurement phase

Question 8 of 10

Question 9 of 10

9. According to Farnum, the coefficient of variation is _____________

\(\frac{σ}{μ}\)

\(\frac{2μ}{σ}\)

\(\frac{μ}{σ}\)

\(\frac{2σ}{μ}\)

Question 9 of 10

Question 10 of 10

10. R_j is the ____________

Ratio of jth part

Target value for ratios

Result of jth part

Target value for range

Question 10 of 10