Discussion
Home ‣ Mechanical Engineering ‣ Engineering Materials Comments
- Question
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
- Correct Answer
- cyaniding
- 1. Which of the following is a point imperfection?
Options- A. Vacancy
- B. Interstitial imperfection
- C. Frenkel imperfection
- D. all of these Discuss
- 2. 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
- 3. 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
- 4. In acidic bessemer process, the furnace is lined with
Options- A. silica bricks
- B. a mixture of tar and burnt dolomite bricks
- C. either (a) or (b)
- D. none of these Discuss
- 5. The temperature in the upper part of the blast furnace (zone of reduction) is __________ that of the middle part.
Options- A. equal to
- B. less than
- C. more than Discuss
- 6. Manganese bronze contains more copper than silicon bronze.
Options- A. Yes
- B. No Discuss
- 7. 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 Discuss
- 8. The phosphorus and sulphur in steel making can be removed by using basic bessemer process.
Options- A. Correct
- B. Incorrect Discuss
- 9. 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
- 10. 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
Engineering Materials problems
Search Results
Correct Answer: all of these
Correct Answer: 800°C to 1000°C
Correct Answer: 96% copper, 3% silicon and 1% manganese
Correct Answer: silica bricks
Correct Answer: less than
Correct Answer: No
Correct Answer: Cementite and pearlite
Correct Answer: Correct
Correct Answer: none of these
Correct Answer: are free from oxygen
Comments
There are no comments.More in Mechanical Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.