ASQ Certified Quality Technician Questions 2 — Questions and Answers
Question 1: Which control chart is most appropriate for monitoring the number of defects per unit when the sample size varies?
- p-chart
- np-chart
- u-chart (Correct answer)
- c-chart
Correct answer: u-chart
The u-chart monitors the number of defects per unit and accommodates variable sample sizes.
Question 2: A process has a Cp of 1.5 but a Cpk of 0.8. What does this indicate?
- The process is centered and capable
- The process is capable but not centered (Correct answer)
- The process is centered but not capable
- Both Cp and Cpk indicate the same performance
Correct answer: The process is capable but not centered
A Cp greater than 1 shows the process has sufficient spread capability, but Cpk less than 1 means the process mean is not centered within the specification limits.
Question 3: In a Gage R&R study, what does 'reproducibility' measure?
- Variation due to different parts
- Variation when the same operator measures the same part repeatedly
- Variation due to different operators measuring the same part (Correct answer)
- Total measurement system variation
Correct answer: Variation due to different operators measuring the same part
Reproducibility measures the variation in measurements when different operators measure the same part using the same gage.
Question 4: Which sampling plan standard is commonly used for acceptance sampling by attributes in the US?
- ISO 3951
- ANSI/ASQ Z1.4 (Correct answer)
- MIL-STD-1916
- ANSI/ASQ Z1.9
Correct answer: ANSI/ASQ Z1.4
ANSI/ASQ Z1.4 is the standard for sampling procedures and tables for inspection by attributes.
Question 5: What is the purpose of a pre-control chart?
- To detect special causes after they occur
- To verify process capability before production begins
- To provide early warning that a process is about to go out of control (Correct answer)
- To calculate process sigma levels
Correct answer: To provide early warning that a process is about to go out of control
Pre-control charts provide real-time early warning signals that a process is drifting toward the specification limits before nonconforming product is produced.
Question 6: In a cause-and-effect diagram, the 6 M's typically include machines, methods, materials, measurement, mother nature, and:
- Management
- Manpower (Correct answer)
- Metrics
- Maintenance
Correct answer: Manpower
The six M's in a fishbone (Ishikawa) diagram are Machines, Methods, Materials, Measurement, Mother Nature (Environment), and Manpower (People).
Question 7: A scatter diagram is used to:
- Track defects over time by category
- Show the relationship between two variables (Correct answer)
- Display the distribution of data in intervals
- Separate vital few from the trivial many
Correct answer: Show the relationship between two variables
A scatter diagram plots pairs of numerical data to identify potential correlations or relationships between two variables.
ASQ Certified Quality Technician Questions 2
Which control chart is most appropriate for monitoring the number of defects per unit when the sample size varies?