Properties of Plastics
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Questions and Answers

Which property of plastics makes them suitable for soundproofing?

  • Electric insulation
  • Fire resistance
  • Sound absorption (correct)
  • Humidity maintenance

What is the primary factor that determines the weather resistance of plastics?

  • Chemical composition during manufacturing (correct)
  • Dimensional stability
  • Thermal property
  • Optical property

What is the property of plastics that allows them to be reused?

  • Optical property
  • Ductility
  • Recycling (correct)
  • Thermal property

Which property of plastics affects their ability to transmit light?

<p>Optical property (D)</p> Signup and view all the answers

What is the primary advantage of thermo-plastic types of plastics?

<p>Easy reshaping and reuse (A)</p> Signup and view all the answers

Why do plastics offer great corrosion resistance?

<p>Due to their chemical composition during manufacturing (B)</p> Signup and view all the answers

What is the primary function of acoustic boards produced by saturating phenolic resins?

<p>To provide sound insulation (B)</p> Signup and view all the answers

Which of the following properties of plastics is similar to that of wood?

<p>Thermal property (D)</p> Signup and view all the answers

What is the primary advantage of recycling plastics?

<p>To minimize environmental pollution (A)</p> Signup and view all the answers

What is the characteristic of translucent plastics?

<p>Allowing light to pass through but changing its direction (A)</p> Signup and view all the answers

What is the primary application of foamed and expanded plastics?

<p>As thermal insulators (D)</p> Signup and view all the answers

What is the characteristic of most plastics in terms of weather resistance?

<p>They are capable of resisting weathering except for some limited varieties (A)</p> Signup and view all the answers

Which of the following plastics is not known for its fire resistance?

<p>Cellulose acetate (A)</p> Signup and view all the answers

What is the primary reason why plastics are not affected by termites and rodents?

<p>Because they have no nutrition values (B)</p> Signup and view all the answers

What is a limitation of thermo-plastic type plastics?

<p>They have low melting point (D)</p> Signup and view all the answers

What makes plastics suitable for use in electric cables and electronic tools?

<p>Their good electric insulation properties (B)</p> Signup and view all the answers

Why are thermo setting type plastics not suitable for recycling?

<p>Because they have high melting point (D)</p> Signup and view all the answers

What is a benefit of plastics in terms of maintenance?

<p>They do not need any surface finishing coats or paints (C)</p> Signup and view all the answers

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