Engineering Materials problems
- 1. German silver contains
Options- A. 70% copper and 30% zinc
- B. 60% copper and 40% zinc
- C. 59% copper, 40% zinc and 1% tin
- D. 60.45% copper, 35.2% zinc and 5.35% nickel Discuss
Correct Answer: 60.45% copper, 35.2% zinc and 5.35% nickel
- 2. The approximate height of a blast furnace is
Options- A. 10 m
- B. 20 m
- C. 30 m
- D. 40 m Discuss
Correct Answer: 30 m
- 3. Which of the following is a case hardening process?
Options- A. Carburising
- B. Cyaniding
- C. Nitriding
- D. all of these Discuss
Correct Answer: all of these
- 4. A fine grained steel
Options- A. is less tough and has a greater tendency to distort during heat treatment
- B. is more ductile and has a less tendency to distort during heat treatment
- C. is less tough and has a less tendency to distort during heat treatment
- D. is more ductile and has a greater tendency to distort during heat treatment Discuss
Correct Answer: is more ductile and has a less tendency to distort during heat treatment
- 5. In a unit cell of a body centred cubic space lattice, there are __________ atoms.
Options- A. six
- B. nine
- C. fourteen
- D. seventeen Discuss
Correct Answer: nine
- 6. The percentage of phosphorus is phosphor bronze is
Options- A. 0.1
- B. 1
- C. 11.1
- D. 98 Discuss
Correct Answer: 0.1
- 7. The high speed steel has __________ percentage of tungsten.
Options- A. maximum
- B. minimum Discuss
Correct Answer: maximum
- 8. In the austempering process of heat treatment, austenite changes into
Options- A. martensite
- B. troostite
- C. sorbite
- D. bainite Discuss
Correct Answer: bainite
- 9. Nichrome contains more iron than Inconel.
Options- A. Agree
- B. Disagree Discuss
Correct Answer: Agree
- 10. The red flame during the operation of a bessemer converter indicates that the
Options- A. air is burning out silicon and manganese
- B. silicon and manganese has burned out and carbon has started oxidising
- C. converter must be tilted to remove the contents of the converter
- D. red flame does not occur during the operation of a bessemer converter Discuss
Correct Answer: red flame does not occur during the operation of a bessemer converter
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