CQE (CQE) Fundamentals 4

Question 1

Which type of control chart is MOST appropriate for monitoring the proportion of defective items in subgroups of varying size?

Accepted Answer

p-chart

Answer

The p-chart monitors the proportion (fraction) defective and accommodates varying subgroup sizes, unlike the np-chart which requires constant size.

Question 2

In Failure Mode and Effects Analysis (FMEA), the Risk Priority Number (RPN) is calculated as:

Accepted Answer

Severity × Occurrence × Detection

Answer

RPN = Severity × Occurrence × Detection, and is used to prioritize which failure modes require corrective action.

Question 3

A Type I error in hypothesis testing means:

Accepted Answer

Rejecting the null hypothesis when it is actually true (false positive)

Answer

A Type I error (alpha error) occurs when the null hypothesis is rejected even though it is true — a false positive conclusion.

Question 4

Which quality tool is MOST appropriate for analyzing whether a relationship exists between two continuous variables?

Accepted Answer

Scatter diagram

Answer

A scatter diagram plots pairs of data to visually assess the correlation (relationship) between two continuous variables.

Question 5

The primary difference between Quality Assurance (QA) and Quality Control (QC) is that:

Accepted Answer

QA is process-focused and preventive; QC is product-focused and detection-based

Answer

QA focuses on processes and preventing defects from occurring, while QC focuses on inspecting products to detect defects.

CQE - Certified Quality Engineer Practice Test