CPE Packaging Materials & Components 2

Question 1

Which property of a packaging material is measured by the Gurley Hill method?

Accepted Answer

Air permeability

Answer

The Gurley Hill method measures air permeability by timing how long it takes a fixed volume of air to pass through a material sample.

Question 2

What is the primary function of an ethylene vinyl alcohol (EVOH) layer in multilayer flexible packaging?

Accepted Answer

Oxygen barrier

Answer

EVOH provides excellent oxygen barrier properties in multilayer structures, extending shelf life of oxygen-sensitive products.

Question 3

In corrugated board construction, what does 'C-flute' refer to compared to 'B-flute'?

Accepted Answer

C-flute is thicker with lower flute count per foot

Answer

C-flute is thicker (~4.8mm) and has fewer flutes per foot than B-flute, providing greater stacking strength.

Question 4

Which type of closure is most appropriate for a child-resistant pharmaceutical package under 16 CFR 1700?

Accepted Answer

Press-and-turn cap

Answer

Press-and-turn caps are the most common child-resistant closure meeting CPSC requirements under 16 CFR 1700.

Question 5

What is the key difference between low-density polyethylene (LDPE) and high-density polyethylene (HDPE) in packaging applications?

Accepted Answer

HDPE has higher crystallinity and stiffness; LDPE is more flexible

Answer

HDPE has higher crystallinity, resulting in greater stiffness and chemical resistance, while LDPE's branched structure makes it more flexible.

(CPE) Certified Packaging Engineer Practice Test