DT 1.1

• What is the definition of a manufactured board ? A man-made

  wood-based composite material
• What is the definition of a stock form? A set of standard sizes in which materials are available


  as well as the format e.g. powders granules sheets etc.
• What is the definition of mechanical properties? Associated with how a material reacts to an external force
• What is the definition of physical properties? Associated with the actual make-up or structure of the material.
• What is the definition of compressive strength? The ability to withstand being crushed or shortened by pushing forces
• What is the definition of tensile strength? The ability to resist stretching or pulling forces.
• What is the definition of hardness? The ability to resist abrasive wear such as scratching


  surface indentation or cutting.
• What is the definition of toughness? The ability to absorb impact force without fracture.
• What is the definition of a composite material? A material comprised of two or more different materials


  resulting in a material with enhanced properties
• What is the definition of a smart material? A material whose physical properties change in response to an input or change in the environment


  such as electricity pressure temperature or light.
• What is the definition of a modern material? A material developed through the invention of new or improved processes


  for example as a result of man-made materials or human intervention
• What is the definition of a ferrous metal? A metal containing mostly iron and carbon
• What is the definition of a non-ferrous metal? A metal which does not contain iron.
• What is the definition of an alloy? A metal made of two or more metals


  or combing two or more elements one of which must be metal.
• What is the definition of a thermoplastic? A material that can be repeatedly reheated and reshaped
• What is the definition of a thermosetting polymer? A material which when heated undergoes a chemical change whereby the molecules form rigid cross links. Thermosetting polymers can’t be reheated and reshaped

  even at high temperatures.
• What stock forms do metals have ? "Square tubing
• Square bar
• Round tubing
• Round bar
• Hexagonal bar "
• What are the advantages of using stock forms ? "Uniformity of material across countries
• The materials form can be transported more easily once converted into stock forms rather than as a raw materials
• Standard stock sizes are less expensive than specialist sizes because they are processed in large quantities and there is less waiting time than for a specialist size as the material will be repeatedly manufactured in the same sizes. "
• What is bending strength ? The ability to resist forces that may bend the material.
• What is shear strength ? The ability to resist sliding forces on a parallel plane
• What is torsional strength? The ability to withstand twisting forces from applied torque or torsion.
• What is plasticity ? The ability to be permanently deformed (shaped) and retain the deformed shape.
• What is ductility? The ability to be drawn out under tension


  reducing the cross-sectional area without cracking for example stretching a material into wire.
• What malleability? "The ability to withstand deformation by compression without cracking.
• Malleability increases with a rise in temperature. "
• What is elasticity? The ability to be deformed and then return to the original shape when the force is removed.
• What is an electrical conductor ? "Allows the flow of electrical current through the material.
• A good conductor gives very little resistance to the flow of charge. "
• What is an electrical insulator? Does not allow the flow of electricity through the material.
• What is a thermal conductor ? "Allows the transfer of heat energy through the material.
• A material with high thermal conductivity allows the transfer of heat to occur quickly across the material. "
• What a thermal insulator ? Prevents the transfer of heat through the material.
• What is thermal expansion? The increase in material volume in response to a heat input.
• What is an opaque material? Prevents light travelling through.