Plastics QCAA Engineering Unit 4

Which of the following statements is true about LDPE?

• LDPE is very stiff and not ductile

• LDPE is not very stiff and very ductile

• LDPE is very tough and stiff

• LDPE is stronger than HDPE

Which of the following properties makes Polypropylene (PP) suitable for use in products exposed to heat?

• Poor resistance to UV light

• Resistant to heat distortion

• High cost

• Poor electrical properties

What is the chemical resistance of PVC dependent on?

• Electrical properties

• Temperature

• Flame properties

• Ductility

Which type of plastic is commonly used for flexible bottles?

• Polyethylene (PE, HDPE, LDPE)

• Polylactic acid (PLA)

• Polypropylene (PP)

• Polyvinyl chloride (PVC)

What is a common use of Polyvinyl chloride (PVC) in the automotive industry?

• Automobile interiors

• Automobile parts (e.g., instrument panels, sun visors)

• Packaging films

• Gears

Which plastic is used in personal protective equipment?

• Polyethylene (PE, HDPE, LDPE)

• Polylactic acid (PLA)

• Acrylonitrile butadiene styrene (ABS)

• Nylon (PA)

What is a common use for polyvinyl chloride?

• Plastic gears

• Waste water drainage pipes

• High-voltage cable insulation

• Medical implants

Which of the following is not used for plastic gears?

• Nylon

• Polylactic acid

• Polyvinyl chloride

• Acrylonitrile butadiene styrene

Which material is not used for high-voltage transmission cable insulation?

• Polyvinyl chloride

• Polypropylene

• Polyethylene

• Polystyrene

Which material is used for high-voltage transmission cable insulation?

• Polypropylene

• Polystyrene

• Polyethylene

• Polyvinyl chloride