3.1.2. Elastomers

What is the definition of "Electrical Insulator"?

• The ability to absorb impact force without fracture

• The ability to resist abrasive wear such as scratching, surface indentation or cutting

• The ability to resist stretching or pulling forces

• Does not allow the flow of electricity through the material

What is the definition of "Tensile strength"?

• The ability to absorb impact force without fracture

• The ability to resist abrasive wear such as scratching, surface indentation or cutting

• The ability to resist stretching or pulling forces

• Does not allow the flow of electricity through the material

What is the definition of "Toughness"?

• The ability to absorb impact force without fracture

• The ability to resist abrasive wear such as scratching, surface indentation or cutting

• The ability to resist stretching or pulling forces

• Does not allow the flow of electricity through the material

What is the definition of "Hardness"?

• The ability to absorb impact force without fracture

• The ability to resist abrasive wear such as scratching, surface indentation or cutting

• The ability to resist stretching or pulling forces

• Does not allow the flow of electricity through the material

What is a characteristic of elastomers at room temperature?

• They are brittle and break easily.

• They can be deformed under pressure.

• They conduct electricity well.

• They do not change shape under pressure.

What happens to elastomers when pressure is released?

• They remain deformed.

• They melt.

• They return to their original shape.

• They become brittle.

Which of the following is true about elastomers?

• They are excellent electrical conductors.

• They are rigid and inflexible.

• They stretch easily at room temperature.

• They dissolve in water.

Which of the following is a characteristic of natural rubber?

• High tensile strength

• Low hardness

• High elongation

• Poor cold resistance

What is one of the uses of natural rubber?

• Electronics

• Tyres

• Furniture

• Glassware

Natural rubber is known for its:

• High elongation

• Low tensile strength

• Good cold resistance

• Poor hardness