Discussion
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- Question
The metal suitable for bearings subjected to heavy loads, is
Options- A. silicon bronze
- B. white metal
- C. monel metal
- D. phosphor bronze
- Correct Answer
- white metal
- 1. Corrosion resistance of steel is increased by adding nickel and chromium.
Options- A. Agree
- B. Disagree Discuss
- 2. Which of the following property is desirable for materials used in tools and machines?
Options- A. Elasticity
- B. Plasticity
- C. Ductility
- D. Malleability Discuss
- 3. Manganese is added in low carbon steel to
Options- A. make the steel tougher and harder
- B. raise the yield point
- C. make the steel ductile and of good bending qualities
- D. all of the above Discuss
- 4. Body centred cubic space lattice is found in
Options- A. zinc, magnesinm, cobalt, cadmium, antimony and bismuth
- B. gamma-iron, aluminium, copper, lead, silver and nickel
- C. alpha-iron, tungsten, chromium and molybdenum
- D. none of the above Discuss
- 5. In high speed steels, manganese is used to tougher the metal and to increase its
Options- A. yield point
- B. critical temperature
- C. melting point
- D. hardness Discuss
- 6. In iron, the presence of carbon in free form is called graphite.
Options- A. Agree
- B. Disagree Discuss
- 7. The compressive strength of cast iron is __________ that of its tensile strength.
Options- A. equal to
- B. less than
- C. more than Discuss
- 8. 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
- 9. 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
- 10. 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
Engineering Materials problems
Search Results
Correct Answer: Agree
Correct Answer: Elasticity
Correct Answer: make the steel ductile and of good bending qualities
Correct Answer: alpha-iron, tungsten, chromium and molybdenum
Correct Answer: critical temperature
Correct Answer: Agree
Correct Answer: more than
Correct Answer: 900°C to 1400°C
Correct Answer: all of these
Correct Answer: Silicon
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