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Melting the granules:


A) breaks molecular bonds and reduces swell
B) encapsulates the additives in the polypropylene
C) allows the polymer to be cut up into pellets
D) b & c

E) C) and D)
F) B) and D)

Correct Answer

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The __________, the first part of the dryer, is a dewatering device that separates the bulk of the water off by gravity.


A) pelletizer
B) scalping box
C) spirex
D) helix

E) C) and D)
F) B) and D)

Correct Answer

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A solids feeder connected to an air system that is used to transfer plastic. When the slide valve is opened under a feed tank, granules drop into a ___________. Granules move through the system without altering pressures on either side of the star feeder with the aid of a vent.


A) air system
B) homogenizer
C) star feeder
D) variable feeder

E) A) and C)
F) B) and D)

Correct Answer

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