CPT Quality Assurance & Process Control 3

Question 1

On an X-bar and R chart, the R chart monitors:

Accepted Answer

The variation within subgroups

Answer

The R (range) chart tracks the spread or variability within each subgroup, measuring within-subgroup variation.

Question 2

Which quality cost category includes scrap, rework, and warranty repairs?

Accepted Answer

Internal failure costs

Answer

Scrap and rework are internal failure costs because they occur before the product reaches the customer; warranty repairs are external failure costs.

Question 3

A process produces 500 units with 15 defective. What is the defect rate expressed as a percentage?

Accepted Answer

3.0%

Answer

Defect rate = (15 ÷ 500) × 100 = 3.0%, calculated by dividing defectives by total units produced.

Question 4

The primary purpose of a gage R&R study is to:

Accepted Answer

Evaluate the measurement system's contribution to total variation

Answer

Gage R&R (Repeatability and Reproducibility) quantifies how much of the observed variation comes from the measurement system itself versus actual part variation.

Question 5

In Six Sigma, DMAIC stands for Define, Measure, Analyze, Improve, and:

Accepted Answer

Control

Answer

Control is the final phase of DMAIC, focused on sustaining improvements and preventing the process from reverting to its previous state.

(CPT) Certified Production Technician Practice Test

(CPT) Certified Production Technician Practice Test

CPT Quality Assurance & Process Control 3