Discussion
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- Question
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
- Correct Answer
- any one of these
- 1. 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
- 2. The acidic bessemer process is suitable for producing steel from pig iron containing large quantities of phosphorus.
Options- A. Correct
- B. Incorrect Discuss
- 3. The steel produced by cementation process is known as __________ steel.
Options- A. blister
- B. crucible Discuss
- 4. Chromium when added to steel __________ the tensile strength.
Options- A. does not effect
- B. decreases
- C. increases Discuss
- 5. Tin base white metals are used where the bearings are subjected to
Options- A. large surface wear
- B. elevated temperatures
- C. light load and pressure
- D. high pressure and load Discuss
- 6. Which of the following metal is used for nuclear energy?
Options- A. Uranium
- B. Thorium
- C. Niobium
- D. all of these Discuss
- 7. 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
- 8. 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
- 9. The upper critical point varies according to the carbon content in steel.
Options- A. True
- B. False Discuss
- 10. A steel containing ferrite and pearlite is
Options- A. hard
- B. soft
- C. tough
- D. hard and tough Discuss
Engineering Materials problems
Search Results
Correct Answer: heated below or close to the lower critical temperature and then cooled slowly
Correct Answer: Incorrect
Correct Answer: blister
Correct Answer: increases
Correct Answer: large surface wear
Correct Answer: all of these
Correct Answer: a mixture of tar and burnt dolomite bricks
Correct Answer: 30° C to 50° C above lower critical temperature
Correct Answer: True
Correct Answer: soft
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