Plastic Engineering Chapter1&2

The bottles from thermo-plastic materials are made by

• Compression moulding

• Extrusion

• Injection moulding

• Blow moulding

The long plastic rods and tubes are produced by

• Compression moulding

• Extrusion

• Injection moulding

• Blow moulding

The process of producing thin sheets by squeezing a thermo plastic material between revolving cylinders is known as

• Compression moulding

• Extrusion

• Injection moulding

• Calendering

The process of producing plastic components is moulds without the application of pressure is known as

• Casting

• Extrusion

• Injection moulding

• Calendering

Which one of the following is the most common polymer type in fiber-reinforced polymer composites

• Thermoplastic

• Thermosets

• Elastomer

• both a & B

Which of the following is incorrect regarding compression moulding?

• Mould is simple & easy to manufacture

• No wastage of raw material

• Dimensional accuracy & surface finish of products are good

• Suitable for products with intricate shapes

7. Identify the product that can be not made by compression moulding process

• Automotive panels

• Washing machine housing

• Bottles

• Gaskets

Generally the plastics are processes in ___________ stages.

• 1

• 2

• 3

• 4

In compression moulding the curing time is ___________.

• less

• mooderate

• more

• none

During transfer moulding, plastic material is transferred into a chamber called ___________.

• i) Sprue

• Pot

• Mould cavity

• None