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Free IASSC Lean Six Sigma – Black Belt Practice Questions

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Exam style questions across every ICBB domain

Last Update 4 days ago
Total Questions : 300

Start with our free ICBB practice questions, carefully crafted to mirror the domains, phrasing, and difficulty of the real Lean Six Sigma Black Belt exam. Each ICBB exam question comes with a detailed rationale that explains not just which answer is correct but why the others fall short. That's how concepts stick. Use the free set to benchmark yourself: identify your IASSC weak domains, see where you're losing marks, and build a focused study plan in minutes.

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Question # 31

Following the completion of a LSS project the Belt not only creates a Control Plan he also develops a _____________ so those involved in the process know what to do when the critical metrics move out of spec.

Options:

A.  

Response Plan

B.  

Call List

C.  

Chain-of-Command

D.  

Defect Analysis Plan

Discussion 0
Question # 32

Following process modifications, the Null Hypothesis states that no improvement to the process has occurred. If we discover the Null Hypothesis Test was rejected when it was false that would be a(n) _______________.

Options:

A.  

Type I Error

B.  

Type II Error

C.  

Type III Error

D.  

Alpha Error

Discussion 0
Question # 33

Statistical Difference is the magnitude of difference or change required to distinguish between a true difference, brought about by change or improvement, and one that could have occurred by chance.

Options:

A.  

True

B.  

False

Discussion 0
Question # 34

A valuable tool to use during the Measure Phase to show material and information flow throughout an entire process is the ______________ .

Options:

A.  

Value Stream Map

B.  

FMEA

C.  

Pareto Chart

D.  

Standard Operating Procedure

Discussion 0
Question # 35

When variation is removed from the output of a process then the process customer can have more confidence in the experience that results from the process.

Options:

A.  

True

B.  

False

Discussion 0
Question # 36

How many experimental runs exist in a Full Factorial and fully randomized design for 5 factors with 2 replicates for the Corner Points and no Center Points? The factors in the experiment are only at 2-levels.

Options:

A.  

10

B.  

128

C.  

256

D.  

64

Discussion 0
Question # 37

The calculation of Column Total times Row Total divided by Grand Total yields expected values from what type of chart?

Options:

A.  

Pareto Chart

B.  

Sakami Table

C.  

Contingency Table

D.  

None

Discussion 0
Question # 38

The Lean toolbox includes all of the following items except __________.

Options:

A.  

Poke-Yoke

B.  

Standard Operating Procedures

C.  

Kaizen

D.  

5S the work area

Discussion 0
Question # 39

Which statement(s) are correct about the Factorial Plot shown here? (Note: There are 3 correct answers).

Question # 39

Options:

A.  

When the cutting speed increased from low to high level, the tool age increases

B.  

The coefficient of the metal hardness is positively related to the output of tool age

C.  

The coded coefficient is lower for cutting speed than the cutting angle related to the output of tool age

D.  

These plots prove a statistically significance factor with 95% confidence

E.  

These plots are an example of interaction plots

Discussion 0
Question # 40

To be an effective Lean Six Sigma practitioner one must understand the difference between ___________________________.

Options:

A.  

ANOVA and the Analysis of Variance

B.  

Nonparametric tests and tests of Non-normal Data

C.  

Practical and Statistical significance

D.  

F-test and test of variances of 2 samples

Discussion 0

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