When students join an Engineering M _ _ _ _ _ _ _ _ course, they will learn about the properties and usage of metals, wood, ceramic and plastics

Students will know more about machine tools such as lathes and mills when joining the I_ _ _ _ _ _ _ _ _ M_ _ _ _ _ _ _ class.

Which of the following is not a property of engineering materials?*1 pointd) Electrical propertiesa) Mechanical propertiesb) Chemical propertiesc) Polymorphism

QUESTION THREEa. List the four classifications of steels and briefly describe the properties of each.(10 marks)b. What property of titanium makes it attractive for use in race-car and jet-enginecomponents? (2 marks)c. Why is magnesium often used as a structural material in power hand tools? Why are itsalloys used instead of pure magnesium? (3 marks)d. List two examples of refractory materials. Which property of the refractory metalsdefines their most useful applications? (2 marks)e. What are shape-memory alloys (SMAs)? (3 marks)SECTION CQUESTION FOURa. Cite the four factors that influence corrosion. (2 marks)b. Briefly describe the following forms of corrosion, and for each, cite measures that can betaken to prevent or control it. (8 marks)i. Galvanic corrosionii. Crevice corrosioniii. Intergranular corrosioniv. Erosion–Corrosionc. A piece of corroded metal alloy plate was found in a submerged ocean vessel. It wasestimated that the original area of the plate was 800 cm2 and that approximately 7.6 kg hadcorroded away during the submersion. Assuming a corrosion penetration rate of 4 mm/yr forthis alloy in seawater, estimate the time of submersion in years. The density of the alloy is4.5 g/cm3. (3 marks)a. Compare the effectiveness of quenching in moderately agitated water and oil by graphing ona single plot radial hardness profiles for cylindrical specimens of an 8630 steel of diameter65 mm that have been quenched in both media. Use Figure 2 and Figure 3. (7 marks)

Describe an investigation a student could do to find how the resistance of a metalsample varies with temperature. The student uses the equipment shown.Include in your answer:• how the student should use the equipment• the measurements the student should make• how the student should use these measurements to determine the resistance• how to make sure the results are valid.

Which of the following is a type of Engineering Materials and is a Metal?*1 pointa) Asbestosc) Non-Ferrous Metalsd) Both b & cb) Ferrous Metals