ASQ Certified Quality Inspector & Reliability Engineer 3

Question 1

Which type of control chart is most appropriate for monitoring the number of defects per unit when the sample size varies?

Accepted Answer

u-chart

Answer

The u-chart monitors defects per unit and accommodates variable sample sizes, unlike the c-chart which requires constant sample sizes.

Question 2

In reliability engineering, the 'bathtub curve' describes failure rate over time with three distinct phases. Which phase is characterized by a constant failure rate?

Accepted Answer

Useful life phase

Answer

The useful life phase exhibits a constant (random) failure rate, which is modeled by the exponential distribution.

Question 3

A process has a Cp of 1.5 and a Cpk of 0.8. This indicates the process is:

Accepted Answer

Capable but not centered

Answer

Cp > 1.33 shows sufficient spread capability, but Cpk < 1.0 indicates the process mean is shifted toward a specification limit.

Question 4

Which gauge R&R outcome indicates that measurement system variation is unacceptably large?

Accepted Answer

%GRR above 30%

Answer

Per AIAG guidelines, a %GRR above 30% indicates the measurement system is unacceptable and needs improvement.

Question 5

In acceptance sampling, the Producer's Risk (α) is the probability of:

Accepted Answer

Rejecting a lot with quality at or better than the AQL

Answer

Producer's Risk (α) is the probability of rejecting a good lot whose quality meets or exceeds the Acceptable Quality Level.

ASQ - American Society for Quality Certification Practice Test

ASQ - American Society for Quality Certification Practice Test

ASQ Certified Quality Inspector & Reliability Engineer 3