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- Question
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
- Correct Answer
- amorphous material
- 1. 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
- 2. Phosphorus is added in low carbon steels to raise its yield point.
Options- A. True
- B. False Discuss
- 3. In low carbon steels, presence of small quantities of sulphur improves
Options- A. weldability
- B. formability
- C. machinability
- D. hardenability Discuss
- 4. In flame hardening, oxy-acetylene flame is used.
Options- A. Yes
- B. No Discuss
- 5. In normalising process, the hypo-eutectiod steel is heated from 30° C to 50° C above the upper critical temperature and then cooled in still air.
Options- A. True
- B. False Discuss
- 6. 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
- 7. 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
- 8. 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
- 9. The addition of which of the following improves machining of copper?
Options- A. Sulphur
- B. Vanadium
- C. Tin
- D. Zinc Discuss
- 10. 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
Engineering Materials problems
Search Results
Correct Answer: point defect
Correct Answer: True
Correct Answer: machinability
Correct Answer: Yes
Correct Answer: True
Correct Answer: is used where rapid machining is the prime requirement
Correct Answer: Admirality metal
Correct Answer: magnalium
Correct Answer: Sulphur
Correct Answer: less than
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