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Workshop Calculation and Science Practice Test: Heat Treatment
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Workshop Calculation and Science Practice Test: Heat Treatment
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25 Questions

1. What is the name of heat treatment process done to relieve strain and stress?
2. For HSS hardening, the soft metal is first overheated and then cooled in ─
3. Annealing is done in order to ─
4. In order to soften the iron, which heat treatment method is required?
5. High speed steel is pre-heated before heating at the right hardening temperature. The reason behind this is –
6. Which of the following metals has not hardness ranging from 200o c to 250o c ?
7. Which heat treatment method is generally used to remove internal stress by hardening tools?
8. What is the process of heat treatment?
9. The method of heating high carbon steel at critical temperature and gradually cooling it is called-
10. Which process produce equilibrium conditions?
11. What is the maximum temperature at which the internal structure of metal starts to change called?
12. What are the various stages of heat treatment?
13. In which activity a metal’s mechanical properties can be changed as desire by changing the Metal internal structure with the help of heating & cooling?
14. Which is the suitable nitriding process for all alloyed and unalloyed steels?
15. Delicate parts are quenched in oil. The possible reason behind this are –
16. What is the use of normalizing?
17. The properties of steel are changed by suitable heat treatment methods. Which method is suitable to increase abrasion resistance in steel?
18. The objective of steel hardening is-
19. Which heat treatment method is used to make a hard job suitable for machining?
20. The normalizing method in heat treatment is done to ─
21. What is the name of the structure formed, if a steel is heated for about 723°C?
22. What is the process for increasing toughness and decreasing brittleness.
23. When carbon steel is heated above high critical point and then cooled immediately, which property of steel is enhance.
24. The first stage of case hardening carburizing. The purpose of carburizing is-
25. The process of heating metal below 400o c and then cooling in water is called─

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