Six Sigma Black Belt ACTUAL UPDATED
Exam Questions and CORRECT Answers
The larger the standard deviation, the lower the required sample size. - CORRECT
ANSWER - False.
Larger sample sizes are required to obtain a higher desired confidence level. - CORRECT
ANSWER - True.
Bias, stability, and linearity are location-related measurement system errors. - CORRECT
ANSWER - True.
Calibration can correct repeatability and reproducibility problems. - CORRECT
ANSWER - False.
The difference between the observed mean of measurements and the true actual or reference
value is called _____. - CORRECT ANSWER - Bias.
When there is a difference in bias throughout the operating range, the measurement system has a
problem with _____. - CORRECT ANSWER - Linearity.
Ability of the measurement system to be consistent when the same item is measured repeatedly
under the same conditions by the same appraiser is called _____. - CORRECT ANSWER -
Repeatability.
When the same item is measured by different appraisers using the same methods and tools, we
expect the same readings. What is this called? - CORRECT ANSWER - Reproducibility.
During the Measure phase, map the "as-is" process, as currently practiced. - CORRECT
ANSWER - True.
, If a process has 3 process steps (A, B, C) with respective processing rates of 3, 2 and 4 units per
hour, what is the throughput rate of this process? - CORRECT ANSWER - 2 units/hour.
If a process has 3 process steps (A, B, C) with respective processing rates 3, 2 and 4 units per
hour, which step is the bottleneck? - CORRECT ANSWER - B.
Customers are calling the Customer Service call center at the rate of 120 calls/hr, and the call
center can at best handle 60 calls/hr. What is the call cycle time? - CORRECT ANSWER -
1 minute.
Eight patients are waiting in the lobby, and one of the five patients in the five treatment rooms is
being seen by the doctor at this time. What is the WIP? - CORRECT ANSWER - 13.
You need to have a 95% confidence level in estimating the population mean length of parts
which has a standard deviation of 2 inches. You want to be accurate within plus/minus half inch.
What is the required sample size? - CORRECT ANSWER - 62.
In attribute agreement analysis, you want to evaluate 3 agreements: % agreement between
appraisers, within appraisers, and with the expert or standard. - CORRECT ANSWER -
True.
Potential process capability Cp is specifications width of (USL - LSL) divided by process spread
of 6 standard deviations. - CORRECT ANSWER - True.
Tools used to measure the baseline performance includes all of the following except _____. -
CORRECT ANSWER - Design of experiments (DOE).
A process has a mean of 50, and a standard deviation of 5. The upper and lower specification
limits are 80 and 40 respectively. What is the Cp and Cpk of this process? - CORRECT
ANSWER - Cp =1.33 and Cpk = 0.66.
Exam Questions and CORRECT Answers
The larger the standard deviation, the lower the required sample size. - CORRECT
ANSWER - False.
Larger sample sizes are required to obtain a higher desired confidence level. - CORRECT
ANSWER - True.
Bias, stability, and linearity are location-related measurement system errors. - CORRECT
ANSWER - True.
Calibration can correct repeatability and reproducibility problems. - CORRECT
ANSWER - False.
The difference between the observed mean of measurements and the true actual or reference
value is called _____. - CORRECT ANSWER - Bias.
When there is a difference in bias throughout the operating range, the measurement system has a
problem with _____. - CORRECT ANSWER - Linearity.
Ability of the measurement system to be consistent when the same item is measured repeatedly
under the same conditions by the same appraiser is called _____. - CORRECT ANSWER -
Repeatability.
When the same item is measured by different appraisers using the same methods and tools, we
expect the same readings. What is this called? - CORRECT ANSWER - Reproducibility.
During the Measure phase, map the "as-is" process, as currently practiced. - CORRECT
ANSWER - True.
, If a process has 3 process steps (A, B, C) with respective processing rates of 3, 2 and 4 units per
hour, what is the throughput rate of this process? - CORRECT ANSWER - 2 units/hour.
If a process has 3 process steps (A, B, C) with respective processing rates 3, 2 and 4 units per
hour, which step is the bottleneck? - CORRECT ANSWER - B.
Customers are calling the Customer Service call center at the rate of 120 calls/hr, and the call
center can at best handle 60 calls/hr. What is the call cycle time? - CORRECT ANSWER -
1 minute.
Eight patients are waiting in the lobby, and one of the five patients in the five treatment rooms is
being seen by the doctor at this time. What is the WIP? - CORRECT ANSWER - 13.
You need to have a 95% confidence level in estimating the population mean length of parts
which has a standard deviation of 2 inches. You want to be accurate within plus/minus half inch.
What is the required sample size? - CORRECT ANSWER - 62.
In attribute agreement analysis, you want to evaluate 3 agreements: % agreement between
appraisers, within appraisers, and with the expert or standard. - CORRECT ANSWER -
True.
Potential process capability Cp is specifications width of (USL - LSL) divided by process spread
of 6 standard deviations. - CORRECT ANSWER - True.
Tools used to measure the baseline performance includes all of the following except _____. -
CORRECT ANSWER - Design of experiments (DOE).
A process has a mean of 50, and a standard deviation of 5. The upper and lower specification
limits are 80 and 40 respectively. What is the Cp and Cpk of this process? - CORRECT
ANSWER - Cp =1.33 and Cpk = 0.66.
