Certified Six Sigma Black Belt Exam FREE Certified Six Sigma Black Belt Assessment Questions and Answers 3

Question 1

A Black Belt calculates that a process produces 3.4 defects per million opportunities. What sigma level does this represent?

Accepted Answer

6 sigma

Answer

4 sigma

Answer

5 sigma

Answer

7 sigma

Question 2

When conducting a Gage R&R study, the results show that the measurement system accounts for 35% of total observed variation. What action should the Black Belt take?

Accepted Answer

Improve the measurement system before collecting process data

Answer

Accept the measurement system and proceed with data collection

Answer

Increase the sample size to compensate

Answer

Switch to attribute data collection

Question 3

Which statistical test should a Black Belt use to compare the means of three or more groups simultaneously?

Accepted Answer

ANOVA

Answer

Two-sample t-test

Answer

Paired t-test

Answer

Chi-square test

Question 4

In the Control phase, a Black Belt implements an X-bar and R chart. The X-bar chart shows a point beyond the upper control limit. What should be done first?

Accepted Answer

Investigate the assignable cause

Answer

Recalculate the control limits

Answer

Ignore it if the R chart is in control

Answer

Increase the subgroup size

Question 5

A Black Belt needs to prioritize which Critical-to-Quality (CTQ) characteristics to focus on. Which tool links customer requirements to measurable process outputs?

Accepted Answer

Quality Function Deployment (QFD)

Answer

Affinity diagram

Answer

Failure Mode and Effects Analysis (FMEA)

Answer

Value stream map

Question 6

What is the key difference between common cause variation and special cause variation in a process?

Accepted Answer

Common cause variation is inherent to the process while special cause variation is due to identifiable external factors

Answer

Common cause variation is always larger than special cause variation

Answer

Special cause variation cannot be detected by control charts

Answer

Common cause variation only affects defective units