S2 PMW - Heat Processes

What is the primary purpose of the annealing process in metalworking?

• To make metal harder

• To make metal more malleable

• To increase the metal's brittleness

• To change the metal's colour

Which heat treatment process involves heating metal almost to the point of melting and then cooling it quickly?

• Annealing

• Tempering

• Harding

• Line bending

What is the main effect of tempering on metal after it has been hardened?

• It increases the metal's hardness

• It makes the metal more brittle

• It reduces hardness and brittleness, making the metal more ductile

• It changes the metal's colour

Which process is specific to working with plastics and involves heating along a line to fold the plastic?

• Annealing

• Line bending

• Forming

• Tempering

What is the main purpose of the forming process in working with plastics?

• To make the plastic more brittle

• To soften the plastic for shaping

• To harden the plastic

• To change the plastic's colour