Certified Lean Six Sigma Black Belt (CLSSBB) (CLSSBB) Free Practice Test

Question 1

An x-bar control chart has been established with control limits of 3.245 and 3.257, n = 5. An engineer collects the following sample and plots the average on the control chart: 3.257, 3,256, 3. 258, 3.259.

A. the engineer misused the control chart

B. the process is out of control

C. the process is not out of control

D. the control limits are incorrect

Correct Answer: A

Question 2

The Graph which helps to identify and prioritize problems to be solved?

A. Pareto Chart

B. Histogram Chart

C. Fish Bone Graph

D. Control Chart

Correct Answer: A

Question 3

SWOT is an acronym for:

A. strengths, weaknesses, opportunities, threats

B. success wields optimal teams

C. sensory Weibull ordinal tools

D. none of the above

E. statistics without tables

Correct Answer: A

Question 4

Which of the following is not a Measure of Central Tendency?

A. Arithmetic Mean

B. Mode

C. Median

D. Geometric Mean

Correct Answer: A

Question 5

Find Cp and Cpk.

A. .63 and .42

B. .85 and 1.21

C. 1.21 and .85

D. none of the above

E. .35 and .63

Correct Answer: A

Question 6

The essence of Lean is to concentrate effort on removing variation from a process output while lowering cost. (True/False)

A. False

B. True

Correct Answer: B

Question 7

What percent of population falls below the lower specification limits?

A. 6.68 %

B. 9.18%

C. 22.66%

D. 1.83%

Correct Answer: B

Question 8

A quality leader who did extensive work with Japanese industry is:

A. Juran

B. Taguchi

C. Ohno

D. Deming

E. Ishikawa

F. none of the above

G. all of the above

Correct Answer: G

Question 9

Which of the following is the best technique for improving the precision of a designed experiment when the experimental material is NOT homogeneous?

A. Fractionalizing

B. Confounding

C. Blocking

D. Randomization

Correct Answer: C

Question 10

A set of data from a process has 8 readings per sample and 50 samples. The mean of the 50 sample means is 12.62. The mean of the 50 ranges is 0.18.A customer requires that SPC charts be done on their forms which have spaces for only 5 readings per sample. What should be the UCL and LCL for the new averages chart?

A. 12.58 and 12.66

B. 12.53 and 12.71

C. 11.61 and 13.63

D. none of the above

Correct Answer: B

Question 11

Successful Six Sigma projects always:

A. impact the bottom line of the enterprise

B. use designed experiments

C. are completed in a short time frame

D. none of the above

E. all of the above

Correct Answer: A

Question 12

For an F-test to be inferentially valid, all of the following assumptions must be true EXCEPT the

A. populations must be discrete distributions

B. samples must be independent

C. populations must be normally distributed

D. samples must be randomly selected from the population

Correct Answer: A

Question 13

Critical to Quality parameters are derived from?

A. Voice of Customer

B. Regression analysis

C. Measure of central tendency

D. Data dispersion diagrams

Correct Answer: A

Question 14

An x-bar and R chart has four part measurements per sample. The control limits on the averages chart are 2.996 and 3.256. Assume the process data form a normal distribution. What is the probability that the next plotted point falls outside the control limits?

A. 0.0054

B. none of the above

C. 0.00135

D. 0.0027

Correct Answer: D

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GAQM Certified Lean Six Sigma Black Belt (CLSSBB) (CLSSBB) Free Practice Test