Engineering Materials problems
- 1. In low carbon steels, presence of small quantities of sulphur improves
Options- A. weldability
- B. formability
- C. machinability
- D. hardenability Discuss
Correct Answer: machinability
- 2. Phosphorus is added in low carbon steels to raise its yield point.
Options- A. True
- B. False Discuss
Correct Answer: True
- 3. The defect which takes place due to imperfect packing of atoms during crystallisation is known as
Options- A. line defect
- B. surface defect
- C. point defect
- D. none of these Discuss
Correct Answer: point defect
- 4. The material in which the atoms are arranged chaotically, is called
Options- A. amorphous material
- B. mesomorphous material
- C. crystalline material
- D. none of these Discuss
Correct Answer: amorphous material
- 5. Free cutting steels
Options- A. contain carbon in free from
- B. require minimum cutting force
- C. is used where rapid machining is the prime requirement
- D. can be cut freely Discuss
Correct Answer: is used where rapid machining is the prime requirement
- 6. Which of the following metal shrinks most from molten state to solid state?
Options- A. Cast iron
- B. Cast steel
- C. Brass
- D. Admirality metal Discuss
Correct Answer: Admirality metal
- 7. The aluminium alloy made by melting aluminium with 2 to 10% magnesium and 1.75% copper is called
Options- A. duralumin
- B. Y-alloy
- C. magnalium
- D. hindalium Discuss
Correct Answer: magnalium
- 8. The addition of which of the following improves machining of copper?
Options- A. Sulphur
- B. Vanadium
- C. Tin
- D. Zinc Discuss
Correct Answer: Sulphur
- 9. When a steel containing __________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.
Options- A. equal to
- B. less than
- C. more than Discuss
Correct Answer: less than
- 10. The alloy, mainly used for corrosion resistance in stainless steels is
Options- A. silicon
- B. manganese
- C. carbon
- D. chromium Discuss
Correct Answer: chromium
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