Workshop technology and Material Science

A composite material is made of

• A single material

• Two or more separate materials

• Two or more chemically combined materials

• None of these

A composite material has:

• The same functionality as its components

  Incorrect Two or more separate materials

• Lower functionality than its components

  Correct Two or more chemically combined materials

• Higher functionality than its components

  Incorrect None of these

• None of these

What are the reinforcements of a composite?

• The strengtheners of the composite

• The base of the composite

• The mold that the composite is poured in

• The volume of a composite

What is the ability of a substance to allow heat, sound, or electricity to flow through it?

• Malleability

• Ductility

• Solubility

• Conductivity

Composite materials are easy to recycle?

• True

• False

what is a matrix?

• fibers that give the composite strength

• material that retains its own structure

• working together of reinforcements and heat

• continuous portion of the composites

A chain of repeating units

• monomer

• dimer

• replicate

• polymer

Which of the following determine the properties of a polymer?

• chemical nature of the monomer

• length of the polymer chain

• how the monomers are joined together

• All of the above

Proteins are composed of what smaller subunits?

• amino acids

• nucleic acids

• fatty acids

• nucleotides

Define polymer.

• circular molecule made with many repeating units

• short molecule made of a few repeating units

• long, chain-like molecule made of repeating units

• chain-like molecule that contains hydrogen and oxygen