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- Question
The upper critical point varies according to the carbon content in steel.
Options- A. True
- B. False
- Correct Answer
- True
- 1. 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
- 2. 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
- 3. Which of the following metal is used for nuclear energy?
Options- A. Uranium
- B. Thorium
- C. Niobium
- D. all of these Discuss
- 4. 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
- 5. 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
- 6. A steel containing ferrite and pearlite is
Options- A. hard
- B. soft
- C. tough
- D. hard and tough Discuss
- 7. Shock resistance of steel is increased by adding
Options- A. nickel
- B. chromium
- C. nickel and chromium
- D. sulphur, lead and phosphorus Discuss
- 8. 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
- 9. Inconel contains
Options- A. 65% nickel, 15% chromium and 20% iron
- B. 68% nickel, 29% copper and 3% other constituents
- C. 80% nickel and 20% chromium
- D. 80% nickel, 14% chromium and 6% iron Discuss
- 10. Cementite consist of
Options- A. 13% carbon and 87% ferrite
- B. 13% cementite and 87% ferrite
- C. 13% ferrite and 87% cementite
- D. 6.67% carbon and 93.33% iron Discuss
Engineering Materials problems
Search Results
Correct Answer: 30° C to 50° C above lower critical temperature
Correct Answer: a mixture of tar and burnt dolomite bricks
Correct Answer: all of these
Correct Answer: any one of these
Correct Answer: heated below or close to the lower critical temperature and then cooled slowly
Correct Answer: soft
Correct Answer: nickel and chromium
Correct Answer: Silicon
Correct Answer: 80% nickel, 14% chromium and 6% iron
Correct Answer: 6.67% carbon and 93.33% iron
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