CPT Quality Control & Testing 2 — Questions and Answers
Question 1: Which ASTM standard covers the drop test for shipping containers?
- ASTM D5276 (Correct answer)
- ASTM D4169
- ASTM D642
- ASTM D999
Correct answer: ASTM D5276
ASTM D5276 is the standard method for drop testing of loaded containers by free fall.
Question 2: In statistical process control (SPC), a control chart showing individual measurements is called a:
- p-chart
- c-chart
- X-bar chart
- I-MR chart (Correct answer)
Correct answer: I-MR chart
An I-MR (Individuals and Moving Range) chart is used when single measurements are taken rather than subgroups.
Question 3: What does the term 'headspace' refer to in flexible packaging quality evaluation?
- Air gap between product and seal (Correct answer)
- Thickness of the film substrate
- Oxygen content inside the package
- Distance between print registration marks
Correct answer: Air gap between product and seal
Headspace is the volume of air or gas between the product surface and the package seal.
Question 4: Which test measures a package's resistance to crushing forces applied to its sides?
- Tensile strength test
- Vibration test
- Side compression test (SCT) (Correct answer)
- Coefficient of friction test
Correct answer: Side compression test (SCT)
The Side Compression Test (SCT) measures paperboard's resistance to compressive forces applied to its edges.
Question 5: A packaging line produces 10,000 units; 85 are defective. What is the defect rate in parts per million (PPM)?
- 850 PPM
- 8,500 PPM (Correct answer)
- 85 PPM
- 0.85 PPM
Correct answer: 8,500 PPM
PPM = (defects / total) × 1,000,000 = (85/10,000) × 1,000,000 = 8,500 PPM.
Question 6: What is the purpose of a seal integrity test using dye penetration?
- Measure bond tensile strength
- Detect channels or voids in heat seals (Correct answer)
- Evaluate film UV resistance
- Determine moisture vapor transmission rate
Correct answer: Detect channels or voids in heat seals
Dye penetration testing reveals channels, pinholes, or incomplete seals by wicking colored dye through any seal gaps.
Question 7: In acceptance sampling, the Acceptable Quality Level (AQL) defines:
- The maximum allowed defect rate in a rejected lot
- The worst tolerable process average for routine acceptance (Correct answer)
- The exact number of defects found in a sample
- The minimum batch size required for testing
Correct answer: The worst tolerable process average for routine acceptance
AQL is the maximum defect percentage that can still be considered satisfactory as a process average for routine acceptance.
CPT Quality Control & Testing 2
Which ASTM standard covers the drop test for shipping containers?