Quality Practices & Measurement Flashcards
7 cards from real CPT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Quality Practices & Measurement flashcards as text
What does a control chart's 'upper control limit' (UCL) represent?
Answer: Three standard deviations above the process mean
The UCL is set at three standard deviations above the process mean, indicating the boundary beyond which variation is considered non-random.
Which sampling method selects every nth item from a production run?
Answer: Systematic sampling
Systematic sampling selects every nth item at fixed intervals throughout the production run.
What is the purpose of a fishbone (Ishikawa) diagram in quality management?
Answer: Identify root causes of a problem
A fishbone diagram visually maps potential causes of a problem, organized by categories like machine, method, material, and manpower.
A gauge with a resolution of 0.001 inch is used to measure a part tolerance of ±0.005 inch. This gauge resolution is considered:
Answer: Adequate for the measurement
A gauge resolution of 0.001 inch can distinguish increments much smaller than the ±0.005 inch tolerance, making it adequate.
Which quality cost category includes the cost of inspecting incoming raw materials?
Answer: Appraisal costs
Incoming inspection is an appraisal activity — it evaluates product or process quality before further processing.
On a p-chart, what does 'p' stand for?
Answer: Proportion of defective units in a sample
A p-chart monitors the proportion (fraction) of defective items in successive samples of varying or fixed size.
What action should a technician take when a measurement falls exactly on the upper control limit of a control chart?
Answer: Treat it as in-control but monitor closely
A single point on the control limit is technically still in-control, but the technician should watch for additional signals suggesting a process shift.