Science revision | 6035

51. What is the primary component of stainless steel that provides corrosion resistance?

• Carbon

• Chromium

• Nickel

• • Manganese

51. Which of the following is a property of thermosetting plastics?

• • Can be remolded after heating

• • Softens when heated

• • Hardens permanently after heating

• • Low melting point

51. What is the term for the ability of a material to return to its original shape after deformation?

• • Plasticity

• • Elasticity

• • Malleability

• • Ductility

51. Which of the following metals is most resistant to corrosion?

• • Iron

• • Copper

• • Aluminium

• • Gold

51. Which of the following is an example of a non-metallic element?

• • Iron

• • Copper

• • Carbon

• • Aluminium

51. What is the primary use of a heat exchanger?

• • To generate electricity

• • To transfer heat between fluids

• • To store thermal energy

• • To increase fluid pressure

51. What is the term for the amount of energy required to change the state of a substance without changing its temperature?

• 51. Specific heat capacity

• 51. Latent heat

• 51. Thermal conductivity

• 51. Heat capacity

51. Which of the following is an example of a renewable energy source?

• • Coal

• • Natural gas

• • Solar energy

• • Nuclear energy

31. What is the primary purpose of a sacrificial anode in a hot water cylinder?

• 31. To increase water temperature

• • To prevent corrosion

• • To reduce water pressure

• • To improve water flow

31. Which of the following is a characteristic of non-ferrous metals?

• • Magnetic

• • Contains iron

• • Resistant to corrosion

• • High tensile strength