Discussion
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- Question
Which one of the following sets of constituents is expected in equilibrium cooling of a hyper-eutectoid steel from austenitic state?
Options- A. Ferrite and pearlite
- B. Cementite and pearlite
- C. Ferrite and bainite
- D. Cementite and martensite
- Correct Answer
- Cementite and pearlite
- 1. Manganese bronze contains more copper than silicon bronze.
Options- A. Yes
- B. No Discuss
- 2. The process in which carbon and nitrogen both are absorbed by the metal surface to get it hardened is known as
Options- A. carburising
- B. cyaniding
- C. flame hardening
- D. induction hardening Discuss
- 3. Which of the following is a point imperfection?
Options- A. Vacancy
- B. Interstitial imperfection
- C. Frenkel imperfection
- D. all of these Discuss
- 4. In the middle part of the blast furnace (zone of absorption), the temperature is
Options- A. 400° to 700°C
- B. 800°C to 1000°C
- C. 1200°C to 1300°C
- D. 1500°C to 1700°C Discuss
- 5. Silicon bronze contains
Options- A. 60% copper, 35% zinc and 5% manganese
- B. 88% copper, 10% tin and 2% zinc
- C. 96% copper, 3% silicon and 1% manganese
- D. 76% copper, 20% silicon and 4% zinc Discuss
- 6. The phosphorus and sulphur in steel making can be removed by using basic bessemer process.
Options- A. Correct
- B. Incorrect Discuss
- 7. Micro-structure of a material is, generally, examined by
Options- A. naked eye
- B. optical microscope
- C. X-ray techniques
- D. none of these Discuss
- 8. Killed steels
Options- A. have minimum impurity level
- B. are produced by L-D process
- C. have almost zero percentage of phosphorus and sulphur
- D. are free from oxygen Discuss
- 9. A steel with 0.8% carbon and 100% pearlite is called
Options- A. eutectoid steel
- B. hypo-eutectoid steel
- C. hyper-eutectoid steel
- D. none of these Discuss
- 10. Vanadium when added to steel
Options- A. increases tensile strength
- B. decreases tensile strength
- C. raises critical temperature
- D. Sowers critical temperature Discuss
Engineering Materials problems
Search Results
Correct Answer: No
Correct Answer: cyaniding
Correct Answer: all of these
Correct Answer: 800°C to 1000°C
Correct Answer: 96% copper, 3% silicon and 1% manganese
Correct Answer: Correct
Correct Answer: none of these
Correct Answer: are free from oxygen
Correct Answer: eutectoid steel
Correct Answer: increases tensile strength
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