Week 2 Plastics

• Materials & Manufacturing
• HBO
• Studiejaar 2

Quiz on Plastics

07/09/2017

week 2

Materials & Manufacturing

Produces a part that is solid such as a reusable coffee cup lid

1. Blow Molding
2. Injection Molding
3. Injection Blow Molding
4. All of the above

The thickness of a plastic part created through ________is determined by the relationship of the mold and the core.

1. Injection Molding
2. Blow Molding
3. Both Processes

Blow Molding production concerns

1. Leaking seals
2. Pinhole leaks
3. Velocity or pressure of blown air
4. All of the above

Epoxy resin is a thermoplastic

1. True
2. False

PVC is a thermopastic
(Polyvinyl chloride)

1. True
2. False

HDPE is a tough plastic used for making toys
(High-density polyethylene)

1. True
2. False

the process which gives a constant or desired wall thickness

1. Blow Molding
2. Injection Molding
3. Both A & B
4. None

difference between thermopastics and thermoset plastics

1. thermoplastics can be remelted
2. thermoset plastics remain in a permanent solid state once hardened
3. both A & B are correct
4. both A & B are incorrect

which of the following is used to manufacture carrier bags?

1. LDPE
2. HDPE
3. Polycarbonate
4. PVC

which of the following is used to make CDs?

1. PVC
2. PTFE
3. Polycarbonate
4. Polypropylene

Which process is used to manufacture plastic pipes?

1. Injection molding
2. Extrusion molding
3. Blow molding
4. Vacuum forming

What type of plastic is used to make disposable cups, cutlery, plates model kits, refrigerator linings, cheap toys and disposable food containers?

1. Low density Polythene
2. High density Polythene
3. Polystyrene
4. Acrylic

Following are the advantages of which plastics
--> More resistant to high temperatures
--> Highly flexible design
--> Thick to thin wall capabilities
--> High levels of dimensional stability
--> Cost-effective

1. Thermoplastics
2. Thermosetting plastics
3. Both types of plastics
4. None of the above

(Do fill the blanks with the same word) Blow molding is accomplished in two steps: (1) fabrication of a starting tube of molten plastic, called a/an _______ (same as in glass-blowing); and (2) inflation of the tube to the desired final shape. Forming the ______ is accomplished by either of two processes: extrusion or injection molding.

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