ASQ ASQ Certified Quality Engineer (CQE)

Question 1

In statistical process control (SPC), what does 'common cause variation' refer to?

Accepted Answer

Inherent, natural variation in a process

Answer

Common cause variation is the natural, inherent variability in a stable process resulting from the system itself, not from specific identifiable causes.

Question 2

Which control chart is used to monitor the proportion of defective items in a sample?

Accepted Answer

p chart

Answer

The p chart monitors the proportion (fraction) of defective items in samples of varying or equal size, making it an attribute chart.

Question 3

What is the primary purpose of a Pareto chart in quality management?

Accepted Answer

To identify and prioritize the most significant causes of problems

Answer

A Pareto chart arranges categories by frequency or impact to identify the 'vital few' causes responsible for most problems, applying the 80/20 rule.

Question 4

In a normal distribution, approximately what percentage of data falls within ±2 standard deviations of the mean?

Accepted Answer

95.4%

Answer

Approximately 95.4% of data in a normal distribution falls within ±2 standard deviations of the mean, per the empirical (68-95-99.7) rule.

Question 5

What does the process capability index Cpk measure?

Accepted Answer

How well a process meets specifications considering both spread and centering

Answer

Cpk measures process capability by considering both the process spread relative to specifications and how centered the process mean is within the specification limits.

ASQ - American Society for Quality Certification Practice Test

ASQ - American Society for Quality Certification Practice Test

ASQ ASQ Certified Quality Engineer (CQE)