CPT Quality Control & Testing 5

Question 1

Which test method determines the stacking strength of a filled corrugated container using the McKee formula approach?

Accepted Answer

ASTM D642

Answer

ASTM D642 is the standard test method for determining compressive resistance of shipping containers, related to stacking strength evaluation.

Question 2

What is the primary function of a leak detector using a vacuum chamber (bubble test)?

Accepted Answer

Detect package leaks by observing air bubbles escaping into water under vacuum

Answer

The vacuum bubble test submerges a package in water under vacuum; leaks are revealed by streams of bubbles escaping the package.

Question 3

Process capability index Cpk differs from Cp because Cpk:

Accepted Answer

Accounts for process centering relative to specification limits

Answer

Cpk adjusts for process mean offset from the specification center, making it a more realistic capability measure than Cp.

Question 4

In packaging testing, which condition set is commonly called 'tropical' conditions for climate testing?

Accepted Answer

40°C / 75% RH

Answer

40°C / 75% RH is the ICH-defined accelerated tropical condition used for stability and performance testing of pharmaceutical and food packaging.

Question 5

What is the purpose of a Gauge R&R (Repeatability & Reproducibility) study in packaging QC?

Accepted Answer

Quantify measurement system variation relative to total process variation

Answer

Gauge R&R studies decompose measurement variation into repeatability (equipment) and reproducibility (operator) components to assess measurement system adequacy.

(CPT) Certified Packaging Technologist Practice Test

(CPT) Certified Packaging Technologist Practice Test

CPT Quality Control & Testing 5