CPP Packaging Machinery & Technology 3 — Questions and Answers
Question 1: Which filling technology is best suited for high-viscosity products like peanut butter or thick pastes?
- Gravity filler
- Overflow filler
- Piston filler (Correct answer)
- Net weigh filler
Correct answer: Piston filler
Piston fillers use a positive displacement mechanism that can generate the pressure needed to move thick, viscous products accurately into containers.
Question 2: What is the function of a 'desiccant' inserted inside sealed pharmaceutical packaging?
- Absorb oxygen
- Absorb moisture (Correct answer)
- Emit carbon dioxide
- Prevent static charge
Correct answer: Absorb moisture
Desiccants such as silica gel absorb moisture inside sealed packages to protect moisture-sensitive products from degradation.
Question 3: A packaging machine rated at 200 units per minute has an actual output of 150 units per minute. What is its performance efficiency?
- 50%
- 66.7%
- 75% (Correct answer)
- 80%
Correct answer: 75%
Performance efficiency = (Actual Output / Ideal Output) × 100 = (150 / 200) × 100 = 75%.
Question 4: In induction sealing, what material property of the foil liner generates the heat that bonds the seal to the container finish?
- Thermal conductivity of aluminum
- Magnetic permeability causing eddy current losses (Correct answer)
- Dielectric constant of the lacquer layer
- Coefficient of thermal expansion
Correct answer: Magnetic permeability causing eddy current losses
The alternating electromagnetic field induces eddy currents in the conductive aluminum foil, generating resistive heat that melts the bonding layer.
Question 5: Which labeling technology applies labels using a 'wipe-on' method as the container passes a label applicator pad?
- Blow-on labeling
- Tamp labeling
- Wipe-on labeling (Correct answer)
- Wrap-around labeling
Correct answer: Wipe-on labeling
Wipe-on labeling uses a dispensing pad that contacts the label onto the container surface as it moves past, suitable for flat or slightly curved surfaces.
Question 6: What packaging machine component ensures consistent package spacing before entering a downstream sealing station?
- Timing screw (Correct answer)
- Star wheel
- Infeed belt
- Diverter gate
Correct answer: Timing screw
A timing screw (worm screw) engages containers and spaces them at precise, equal intervals to synchronize them with downstream machinery.
Question 7: Modified Atmosphere Packaging (MAP) machines that flush packages with nitrogen primarily do so to:
- Kill microorganisms
- Displace oxygen and retard oxidative spoilage (Correct answer)
- Add CO2 to inhibit bacteria
- Increase package rigidity
Correct answer: Displace oxygen and retard oxidative spoilage
Nitrogen is an inert gas used to displace oxygen in MAP, reducing oxidation of fats and pigments and extending product shelf life.
CPP Packaging Machinery & Technology 3
Which filling technology is best suited for high-viscosity products like peanut butter or thick pastes?