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- Question
The austenitic stainless steel contains
Options- A. 18% chromium and 8% nickel
- B. 8% chromium and 18% nickel
- C. 14% chromium and 0.35% carbon
- D. 14% nickel and 0.35% carbon
- Correct Answer
- 18% chromium and 8% nickel
- 1. Which of the following iron exists at 910° C?
Options- A. ?-iron
- B. ?-iron
- C. ?-iron
- D. ?-iron Discuss
- 2. Which of the following material has maximum malleability?
Options- A. Lead
- B. Soft steel
- C. Wrought iron
- D. Copper Discuss
- 3. Silicon is added in low carbon steels to
Options- A. make the steel tougher and harder
- B. make the steel of good bending qualities
- C. raise the yield point
- D. all of these Discuss
- 4. Steel containing upto 0.15% carbon, is known as
Options- A. mild steel
- B. dead mild steel
- C. medium carbon steel
- D. high carbon steel Discuss
- 5. In high speed steels, vanadium adds to the property of red hardness and tungsten and chromium add to high wear resistance.
Options- A. True
- B. False Discuss
- 6. Which of the following is a mesomorphous material?
Options- A. Mica
- B. Silver
- C. Lead
- D. Brass Discuss
- 7. In a face centred cubic 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. fourteen atoms out of which eight atoms are located at the corners of the cube and six atoms at the centres of six faces
- C. seventeen atoms out of which twelve atoms are located at the twelve corners of the hexagonal prism, one atom at the centre of each of the two hexagonal faces and three atoms are symmetrically arranged in the body of the cell
- D. none of the above Discuss
- 8. Which of the following gives the correct order of increasing hot hardness of cutting tool materials?
Options- A. Diamond, Carbide, High speed steel
- B. Carbide, Diamond, High speed steel
- C. High speed steel, Carbide, Diamond
- D. High speed steel, Diamond, Carbide Discuss
- 9. Duplex process of steel making is a combination of
Options- A. basic bessemer and acid open hearth processes
- B. acid bessemer and basic open hearth processes
- C. acid bessemer and acid open hearth processes
- D. basic bessemer and basic open hearth processes Discuss
- 10. A steel is heated at about 875° C where the structure consists of entirely austenite. It is then cooled suddenly at a temperature of about 250° C to 525° C. This process of heat treatment is known as
Options- A. normalising
- B. annealing
- C. austempering
- D. martempering Discuss
Engineering Materials problems
Search Results
Correct Answer: ?-iron
Correct Answer: Lead
Correct Answer: make the steel tougher and harder
Correct Answer: dead mild steel
Correct Answer: True
Correct Answer: Mica
Correct Answer: fourteen atoms out of which eight atoms are located at the corners of the cube and six atoms at the centres of six faces
Correct Answer: High speed steel, Carbide, Diamond
Correct Answer: acid bessemer and basic open hearth processes
Correct Answer: austempering
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