Engineering Materials problems
- 1. Corrosion resistance of steel is increased by adding nickel and chromium.
Options- A. Agree
- B. Disagree Discuss
Correct Answer: Agree
- 2. The metal suitable for bearings subjected to heavy loads, is
Options- A. silicon bronze
- B. white metal
- C. monel metal
- D. phosphor bronze Discuss
Correct Answer: white metal
- 3. In iron, the presence of carbon in free form is called graphite.
Options- A. Agree
- B. Disagree Discuss
Correct Answer: Agree
- 4. The compressive strength of cast iron is __________ that of its tensile strength.
Options- A. equal to
- B. less than
- C. more than Discuss
Correct Answer: more than
- 5. Gamma-iron occurs between the temperature range of
Options- A. 400°C to 600°C
- B. 600°C to 900°C
- C. 900°C to 1400°C
- D. 1400°C to 1530°C Discuss
Correct Answer: 900°C to 1400°C
- 6. Wrought iron
Options- A. is a ductile material
- B. can be easily forged or welded
- C. cannot stand sudden and excessive shocks
- D. all of these Discuss
Correct Answer: all of these
- 7. Which of the following impurity in cast iron promotes graphite nodule formation and increases the fluidity of the molten metal?
Options- A. Silicon
- B. Sulphur
- C. Manganese
- D. Phosphorus Discuss
Correct Answer: Silicon
- 8. Which of the following property is desirable in parts subjected to shock and impact loads?
Options- A. Strength
- B. Stiffness
- C. Brittleness
- D. Toughness Discuss
Correct Answer: Toughness
- 9. According to Indian standard specifications, a plain carbon steel designated by 40 C8 means that the carbon content is
Options- A. 0.04%
- B. 0.35 to 0.45%
- C. 0.4 to 0.6%
- D. 0.6 to 0.8% Discuss
Correct Answer: 0.35 to 0.45%
- 10. Connecting rod is, usually, made from
Options- A. low carbon steel
- B. high carbon steel
- C. medium carbon steel
- D. high speed steel Discuss
Correct Answer: medium carbon steel
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