Question 1

Which of the following processes would be applicable to produce hulls for small boats (three best answers) :

Accepted Answer

A)  blow molding
B)  compression molding
C)  injection molding
D)  rotational molding
E)  vacuum thermoformingF) None of the above
G) C) and D)

Question 2

Stretch blow molding is a variation of which one of the following:

Accepted Answer

A)  extrusion blow molding
B)  injection blow molding
C)  rotational blow moldingD) All of the above
E) A) and C)

Question 3

A polymer melt exhibits which of the following properties and characteristics (three correct answers) :

Accepted Answer

A)  becomes less resistant to flow at high shear rates
B)  becomes more resistant to flow at high shear rates
C)  high viscosity
D)  low viscosity
E)  Newtonian fluidF) viscoelasticityG) B) and C)
H) A) and F)

Question 4

Which of the following processes are used to produce plastic sheet and film (three correct answers) :

Accepted Answer

A)  blown-film extrusion process
B)  calendering
C)  chill-roll extrusion
D)  doctor blade method
E)  spinningF) thermoformingG) transfer moldingH) A) and B)
I) C) and D)

Question 5

Which one of the following thermoforming processes requires the most expensive mold:

Accepted Answer

A)  mechanical thermoforming
B)  pressure thermoforming
C)  vacuum thermoformingD) All of the above
E) A) and C)

Question 6

The two most common polymer foams are which of the following:

Accepted Answer

A)  polyacetal
B)  polyethylene
C)  polystyrene
D)  polyurethane
E)  polyvinylchlorideF) All of the above
G) A) and E)

Question 7

Which of the following are reasons why injection molding of thermosets is more difficult than injection molding of thermoplastics (two best answers) :

Accepted Answer

A)  allowances must be made for cross-linking of thermosets
B)  barrel temperatures must be hotter for thermosets
C)  cycle times are longer because of curing
D)  thermosets are denser
E)  two injection units are requiredF) D) and E)
G) None of the above

Exam 10: Shaping Processes for Plastics

A polymer melt exhibits which of the following properties and characteristics (three correct answers) :

Correct Answer
verified

Which of the following processes would be applicable to produce hulls for small boats (three best answers) :

Correct Answer
verified

Which of the following processes are used to produce plastic sheet and film (three correct answers) :

Correct Answer
verified

Which one of the following thermoforming processes requires the most expensive mold:

Correct Answer
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Which of the following are reasons why injection molding of thermosets is more difficult than injection molding of thermoplastics (two best answers) :

Correct Answer
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Stretch blow molding is a variation of which one of the following:

Correct Answer
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The two most common polymer foams are which of the following:

Correct Answer
verified

Exam 10: Shaping Processes for Plastics

A polymer melt exhibits which of the following properties and characteristics (three correct answers) :

Correct AnswerverifiedShow Answer

Which of the following processes would be applicable to produce hulls for small boats (three best answers) :

Correct AnswerverifiedShow Answer

Which of the following processes are used to produce plastic sheet and film (three correct answers) :

Correct AnswerverifiedShow Answer

Which one of the following thermoforming processes requires the most expensive mold:

Correct AnswerverifiedShow Answer

Which of the following are reasons why injection molding of thermosets is more difficult than injection molding of thermoplastics (two best answers) :

Correct AnswerverifiedShow Answer

Stretch blow molding is a variation of which one of the following:

Correct AnswerverifiedShow Answer

The two most common polymer foams are which of the following:

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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