Engineering Materials problems
- 1. The steel widely used for making precision measuring instruments is
Options- A. nickel steel
- B. nickel-chrome steel
- C. high speed steel
- D. chrome-vanadium steel Discuss
Correct Answer: nickel steel
- 2. Babbit metal contains
Options- A. 50% tin and 50% antimony
- B. 66% tin, 30% copper and 4% antimony
- C. 88% tin, 4% copper and 8% antimony
- D. 92% tin, 6% copper and 2% antimony Discuss
Correct Answer: 88% tin, 4% copper and 8% antimony
- 3. When a steel containing more than 0.8% carbon is cooled slowly below the lower critical point, it consists of
Options- A. mainly pearlite
- B. mainly ferrite
- C. ferrite and pearlite
- D. pearlite and cementite Discuss
Correct Answer: pearlite and cementite
- 4. In a crystalline material, atoms are arranged in definite and orderly manner and form.
Options- A. Agree
- B. Disagree Discuss
Correct Answer: Agree
- 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
Correct Answer: True
- 6. 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
Correct Answer: dead mild steel
- 7. 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
Correct Answer: make the steel tougher and harder
- 8. Which of the following material has maximum malleability?
Options- A. Lead
- B. Soft steel
- C. Wrought iron
- D. Copper Discuss
Correct Answer: Lead
- 9. Which of the following iron exists at 910° C?
Options- A. ?-iron
- B. ?-iron
- C. ?-iron
- D. ?-iron Discuss
Correct Answer: ?-iron
- 10. 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 Discuss
Correct Answer: 18% chromium and 8% nickel
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