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- Question
Chilled cast iron is produced
Options- A. by adding magnesium to molten cast iron
- B. by quick cooling of molten cast iron
- C. from white cast iron by annealing process
- D. none of these
- Correct Answer
- by quick cooling of molten cast iron
- 1. The addition of manganese to aluminium improves corrosion resistance.
Options- A. Correct
- B. Incorrect Discuss
- 2. Admirality gun metal contains
Options- A. 60% copper, 35% zinc and 5% manganese
- B. 76% copper, 20% silicon and 4% zinc
- C. 82% copper, 12% zinc and 6% manganese
- D. 88% copper, 10% tin and 2% zinc Discuss
- 3. The process of inducing carbon to __________ carbon steels in order to give it a hard surface is known as carburising.
Options- A. low
- B. medium
- C. high Discuss
- 4. In a close packed hexagonal space lattice, there are
Options- A. nine atoms out of which eight atoms are located at the corners of the cube and one atom at its centre
- B. twelve atoms, all of which are located at the twelve corners of a hexagonal prism
- C. fourteen atoms out of which eight atoms are located at the coners of the cube and six atoms at the centres of six faces
- D. none of the above Discuss
- 5. Hardness of steel is increased by adding sulphur, lead and phosphorus.
Options- A. Yes
- B. No Discuss
- 6. The maximum solubility of carbon in austenite is 1.7% at 1130° C.
Options- A. Yes
- B. No Discuss
- 7. 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
- 8. The approximate height of a blast furnace is
Options- A. 10 m
- B. 20 m
- C. 30 m
- D. 40 m Discuss
- 9. Which of the following is a case hardening process?
Options- A. Carburising
- B. Cyaniding
- C. Nitriding
- D. all of these Discuss
- 10. 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
Engineering Materials problems
Search Results
Correct Answer: Correct
Correct Answer: 88% copper, 10% tin and 2% zinc
Correct Answer: low
Correct Answer: none of the above
Correct Answer: No
Correct Answer: Yes
Correct Answer: 60.45% copper, 35.2% zinc and 5.35% nickel
Correct Answer: 30 m
Correct Answer: all of these
Correct Answer: is more ductile and has a less tendency to distort during heat treatment
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