Engineering Materials problems
- 1. Which of the following is a mesomorphous material?
Options- A. Mica
- B. Silver
- C. Lead
- D. Brass Discuss
Correct Answer: Mica
- 2. 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
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
- 3. 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
Correct Answer: High speed steel, Carbide, Diamond
- 4. 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
Correct Answer: acid bessemer and basic open hearth processes
- 5. 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
Correct Answer: austempering
- 6. 18/8 stainless steel consists of
Options- A. 18% nickel and 8% chromium
- B. 18% chromium and 8% nickel
- C. 18% nickel and 18% chromium
- D. 8% nickel and 8% chromium Discuss
Correct Answer: 18% chromium and 8% nickel
- 7. Muntz metal (Yellow brass) 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% copper and 40% zinc
- 8. Manganese bronze has
Options- A. good wearing qualities and high elasticity
- B. high yield point, high fatigue limit and excellent cold and hot corrosion resistance
- C. high resistance to corrosion
- D. valuable cold working property Discuss
Correct Answer: high resistance to corrosion
- 9. Aluminium bronze has high resistance to corrosion.
Options- A. True
- B. False Discuss
Correct Answer: False
- 10. The property of a material necessary for forgings, in stamping images on coins and in ornamental work, is
Options- A. elasticity
- B. plasticity
- C. ductility
- D. malleability Discuss
Correct Answer: plasticity
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