Engineering Materials problems
- 1. The acidic bessemer process is suitable for producing steel from pig iron containing large quantities of phosphorus.
Options- A. Correct
- B. Incorrect Discuss
Correct Answer: Incorrect
- 2. In process annealing, the hypo-eutectoid steel is
Options- A. heated from 30° C to 50° C above the upper critical temperature and then cooled in still air
- B. heated from 30° C to 50° C above the upper critical temperature and then cooled suddenly in a suitable cooling medium
- C. heated from 30° C to 50° C above the upper critical temperature and then cooled slowly in the furnace
- D. heated below or close to the lower critical temperature and then cooled slowly Discuss
Correct Answer: heated below or close to the lower critical temperature and then cooled slowly
- 3. The purpose of heat treatment is to
Options- A. relieve the stresses set up in the material after hot or cold working
- B. modify the structure of the material
- C. change grain size
- D. any one of these Discuss
Correct Answer: any one of these
- 4. Which of the following metal is used for nuclear energy?
Options- A. Uranium
- B. Thorium
- C. Niobium
- D. all of these Discuss
Correct Answer: all of these
- 5. In basic bessemer process, the furnace is lined with
Options- A. silica bricks
- B. a mixture of tar and burnt dolomite bricks
- C. either (a) or (b)
- D. none of these Discuss
Correct Answer: a mixture of tar and burnt dolomite bricks
- 6. The temperature required for full annealing in hyper-eutectoid steel is
Options- A. 30° C to 50° C above upper critical temperature
- B. 30° C to 50° C below upper critical temperature
- C. 30° C to 50° C above lower critical temperature
- D. 30° C to 50° C below lower critical temperature Discuss
Correct Answer: 30° C to 50° C above lower critical temperature
- 7. The upper critical point varies according to the carbon content in steel.
Options- A. True
- B. False Discuss
Correct Answer: True
- 8. A steel containing ferrite and pearlite is
Options- A. hard
- B. soft
- C. tough
- D. hard and tough Discuss
Correct Answer: soft
- 9. Shock resistance of steel is increased by adding
Options- A. nickel
- B. chromium
- C. nickel and chromium
- D. sulphur, lead and phosphorus Discuss
Correct Answer: nickel and chromium
- 10. Which of the following is added in low carbon steels to prevent them from becoming porous?
Options- A. Sulphur
- B. Phosphorus
- C. Manganese
- D. Silicon Discuss
Correct Answer: Silicon
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