7. What is the iron-carbon phase shown in the metallographic photo: a. Ferrite b

Question

7. What is the iron-carbon phase shown in the metallographic photo: a. Ferrite b. Pearlite c. Cementite d. Martensite e. None of the above 8. Which of the following heat treatment methods is appropriate for improving the machinin a Quenching b. Annealing c. Tempering d. Normalizing e. None of the above 9. In the production of gears, which of the sequences of heat treatment is correct? a. Normalizing carburizing >flame hardening b. Carburizing Normalizing->flame hardening c. Normalizing -> flame hardening > Carburizing d. Carburizing -> flame hardening tempering e. None of the above 10. Which hardness test is appropriate for testing medium hard metal? a. Brinell b. Rockwell C c. Vickers d. Knoop e. None of the above 11. In the triple-plating process of plate steels, the layer sequence is: a. copper-chromium-nickel b. nickel-copper-chromium c. copper-nickel-chromium d. nickel-chromium-copper e. None of the above 12 Which hardness test is appropriate for testing case-hardened materials? a. Brinell b. Rockwell C. Vickers d. Knoop e. None of the above

Explanation / Answer

7. ferrite

8. annealing because it improves the machinability of material.

9. normalising - carburising- flame hardening flame hardening in last to increse the surface hardness.

10. brinell for relatively softer material brinnel is used.

11.copper - nickel - chromium To ensure long-lasting chrome parts, we first add one or more layers of copper to the raw part. Because copper is a non-ferrous material, it adds a layer of protection between the finishing layer and the part. In addition, the layers of copper fill small scratches and pits . When the copper layers are complete, we then add bright nickel plating followed by the chrome plating.

11.

Related Questions

Navigate

• Browse (All)
• Browse 7
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.