Discussion
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- Question
The iron ore in the charge of blast furnace acts as an iron bearing mineral.
Options- A. True
- B. False
- Correct Answer
- True
- 1. Which of the following material has nearly zero coefficient of expansion?
Options- A. Stainless steel
- B. High speed steel
- C. Invar
- D. Heat resisting steel Discuss
- 2. Martensite has needle like structure and is magnetic.
Options- A. Correct
- B. Incorrect Discuss
- 3. Beryllium bronze has
Options- A. high yield point
- B. high fatigue limit
- C. both (a) and (b)
- D. none of these Discuss
- 4. Which of the following statement is true about brittle fracture?
Options- A. High temperature and low strain rates favour brittle fracture
- B. Many metals with hexagonal close packed (H.C.P) crystal structure commonly show brittle fracture
- C. Brittle fracture is always preceded by noise
- D. Cup and cone formation is characteristic for brittle materials Discuss
- 5. Which of the following statements are true for annealing of steels?
Options- A. Steels are heated to 500 to 700° C
- B. Cooling is done slowly and steadily
- C. Internal stresses are relieved
- D. all of these Discuss
- 6. Which of the following display properties similar to that of steel?
Options- A. Blackheart cast iron
- B. Whiteheart cast iron
- C. both (a) and (b)
- D. none of these Discuss
- 7. Which of the following is an amorphous material?
Options- A. Mica
- B. Silver
- C. Lead
- D. Glass Discuss
- 8. Which of the following when used in ordinary low carbon steels, makes the metal ductile and of good bending qualities?
Options- A. Sulphur
- B. Phosphorus
- C. Manganese
- D. Silicon Discuss
- 9. Incoloy, Hastelloy and Vitallium are __________ temperature alloys.
Options- A. high
- B. low Discuss
- 10. The coordination number of a face centred cubic space lattice is
Options- A. six
- B. twelve
- C. eighteen
- D. twenty Discuss
Engineering Materials problems
Search Results
Correct Answer: Invar
Correct Answer: Correct
Correct Answer: both (a) and (b)
Correct Answer: Many metals with hexagonal close packed (H.C.P) crystal structure commonly show brittle fracture
Correct Answer: all of these
Correct Answer: both (a) and (b)
Correct Answer: Glass
Correct Answer: Manganese
Correct Answer: high
Correct Answer: twelve
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