CPT Quality Control & Testing 3

Question 1

Which instrument measures the coefficient of friction (COF) between packaging film surfaces?

Accepted Answer

Tensile tester with COF sled

Answer

A tensile tester fitted with a COF sled drags one film surface across another to measure static and kinetic friction.

Question 2

What does MVTR stand for in packaging testing?

Accepted Answer

Moisture Vapor Transmission Rate

Answer

MVTR (Moisture Vapor Transmission Rate) measures how much water vapor passes through a packaging material over time.

Question 3

A six-sigma process has a defect rate of approximately:

Accepted Answer

3.4 PPM

Answer

A true six-sigma process produces only 3.4 defects per million opportunities, accounting for a 1.5-sigma shift.

Question 4

Which test evaluates a bottle's resistance to internal pressure bursting?

Accepted Answer

Hydrostatic burst test

Answer

The hydrostatic burst test pressurizes containers with water until failure, measuring the burst pressure.

Question 5

In packaging quality, a 'critical defect' is best described as:

Accepted Answer

A defect rendering the unit completely unusable or causing safety hazard

Answer

Critical defects are those that may cause safety hazards or complete unit failure, requiring zero acceptance in sampling plans.

(CPT) Certified Packaging Technologist Practice Test