Tennessee Precision Machining
Certification Exam: Advanced
Manufacturing & Quality Assurance Exam
Questions And Correct Answers (Verified
Answers) Plus Rationales 2025/2026 Q&A
| Instant Download Pdf
1. What is the primary goal of Quality Assurance (QA)?
A. Increase machine speed
B. Reduce labor costs
C. Prevent defects before they occur
D. Increase inventory
Answer: C. Prevent defects before they occur
QA focuses on developing systems and processes that prevent
defects rather than merely detecting them.
2. Which quality tool is used to identify the most significant
causes of defects?
A. Histogram
B. Flowchart
C. Scatter Diagram
D. Pareto Chart
Answer: D. Pareto Chart
,The Pareto Chart follows the 80/20 principle, highlighting the
few causes responsible for most problems.
3. In Six Sigma, a process operating at six sigma produces
approximately:
A. 66,807 defects per million
B. 6,210 defects per million
C. 233 defects per million
D. 3.4 defects per million opportunities
Answer: D. 3.4 defects per million opportunities
Six Sigma quality corresponds to extremely low defect rates.
4. What does SPC stand for?
A. Statistical Production Control
B. Standard Process Calculation
C. Statistical Process Control
D. Systematic Product Compliance
Answer: C. Statistical Process Control
SPC uses statistical methods to monitor and control
manufacturing processes.
5. Which chart is commonly used to monitor process
variation over time?
A. Fishbone Diagram
B. Control Chart
,C. Pareto Chart
D. Gantt Chart
Answer: B. Control Chart
Control charts track process stability and identify special-
cause variation.
6. A process is considered "in control" when:
A. All measurements equal nominal size
B. No variation exists
C. Only common-cause variation is present
D. The machine runs continuously
Answer: C. Only common-cause variation is present
An in-control process exhibits predictable variation from
normal process factors.
7. Cp measures:
A. Process centering
B. Product quality
C. Potential process capability
D. Machine efficiency
Answer: C. Potential process capability
Cp compares specification width to process variation without
considering centering.
, 8. Which capability index considers process centering?
A. Cp
B. Pp
C. Cpm
D. Cpk
Answer: D. Cpk
Cpk evaluates both process spread and how centered the
process is within specifications.
9. What is the purpose of a calibration program?
A. Reduce cycle times
B. Ensure measurement accuracy
C. Increase production volume
D. Improve tooling life
Answer: B. Ensure measurement accuracy
Calibration verifies measuring instruments remain accurate
and traceable.
10. Gauge R&R evaluates:
A. Tool wear
B. Material hardness
C. Machine efficiency
D. Measurement system variation
Answer: D. Measurement system variation
Certification Exam: Advanced
Manufacturing & Quality Assurance Exam
Questions And Correct Answers (Verified
Answers) Plus Rationales 2025/2026 Q&A
| Instant Download Pdf
1. What is the primary goal of Quality Assurance (QA)?
A. Increase machine speed
B. Reduce labor costs
C. Prevent defects before they occur
D. Increase inventory
Answer: C. Prevent defects before they occur
QA focuses on developing systems and processes that prevent
defects rather than merely detecting them.
2. Which quality tool is used to identify the most significant
causes of defects?
A. Histogram
B. Flowchart
C. Scatter Diagram
D. Pareto Chart
Answer: D. Pareto Chart
,The Pareto Chart follows the 80/20 principle, highlighting the
few causes responsible for most problems.
3. In Six Sigma, a process operating at six sigma produces
approximately:
A. 66,807 defects per million
B. 6,210 defects per million
C. 233 defects per million
D. 3.4 defects per million opportunities
Answer: D. 3.4 defects per million opportunities
Six Sigma quality corresponds to extremely low defect rates.
4. What does SPC stand for?
A. Statistical Production Control
B. Standard Process Calculation
C. Statistical Process Control
D. Systematic Product Compliance
Answer: C. Statistical Process Control
SPC uses statistical methods to monitor and control
manufacturing processes.
5. Which chart is commonly used to monitor process
variation over time?
A. Fishbone Diagram
B. Control Chart
,C. Pareto Chart
D. Gantt Chart
Answer: B. Control Chart
Control charts track process stability and identify special-
cause variation.
6. A process is considered "in control" when:
A. All measurements equal nominal size
B. No variation exists
C. Only common-cause variation is present
D. The machine runs continuously
Answer: C. Only common-cause variation is present
An in-control process exhibits predictable variation from
normal process factors.
7. Cp measures:
A. Process centering
B. Product quality
C. Potential process capability
D. Machine efficiency
Answer: C. Potential process capability
Cp compares specification width to process variation without
considering centering.
, 8. Which capability index considers process centering?
A. Cp
B. Pp
C. Cpm
D. Cpk
Answer: D. Cpk
Cpk evaluates both process spread and how centered the
process is within specifications.
9. What is the purpose of a calibration program?
A. Reduce cycle times
B. Ensure measurement accuracy
C. Increase production volume
D. Improve tooling life
Answer: B. Ensure measurement accuracy
Calibration verifies measuring instruments remain accurate
and traceable.
10. Gauge R&R evaluates:
A. Tool wear
B. Material hardness
C. Machine efficiency
D. Measurement system variation
Answer: D. Measurement system variation
