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- Question
The carbon in the pig iron varies from
Options- A. 0.1 to 0.5%
- B. 0.5 to 1%
- C. 1 to 5%
- D. 5 to 10%
- Correct Answer
- 1 to 5%
- 1. Pearlite consists of
Options- A. 13% carbon and 87% ferrite
- B. 13% cementite and 87% ferrite
- C. 13% ferrite and 87% cementite
- D. 6.67% carbon and 93.33% iron Discuss
- 2. The brown smoke during the operation of a bessemer Converter indicates that the
Options- A. air is burning out silicon and managanese
- B. silicon and manganese has burnt and carbon has started oxidising
- C. the converter must be titled to remove the contents of the converter
- D. the brown smoke does not occur during the operation of a bessemer converter Discuss
- 3. The ability of a material to undergo large permanent deformation with the application of a tensile force, is called ductility.
Options- A. Correct
- B. Incorrect Discuss
- 4. An aluminium alloy with 11% silicon is used for making engine pistons by die casting technique.
Options- A. Yes
- B. No Discuss
- 5. The alloying element which can replace tungsten in high speed steels is
Options- A. nickel
- B. vanadium
- C. cobalt
- D. molybdenum Discuss
- 6. Induction hardening is basically a
Options- A. carburising process
- B. surface hardening process
- C. core-hardening process
- D. none of these Discuss
- 7. The strength is the ability of a material to resist
Options- A. deformation under stress
- B. externally applied forces with breakdown or yielding
- C. fracture due to high impact loads
- D. none of these Discuss
- 8. When elements like nickel, chromium, copper and molybdenum are added to the molten cast iron, it produces
Options- A. white cast iron
- B. nodular cast iron
- C. malleable cast iron
- D. alloy cast iron Discuss
- 9. In induction hardening, the depth of hardening is controlled by controlling the voltage.
Options- A. Correct
- B. Incorrect Discuss
- 10. Bronze is an alloy of
Options- A. copper and zinc
- B. copper and tin
- C. copper, tin and zinc
- D. none of these Discuss
Engineering Materials problems
Search Results
Correct Answer: 13% cementite and 87% ferrite
Correct Answer: air is burning out silicon and managanese
Correct Answer: Correct
Correct Answer: Yes
Correct Answer: molybdenum
Correct Answer: surface hardening process
Correct Answer: externally applied forces with breakdown or yielding
Correct Answer: alloy cast iron
Correct Answer: Correct
Correct Answer: copper and tin
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