| 36. | Speisses is a mixture of the following: |
| a. | Arsenides of heavy metals. |
| b. | Antimonides of heavy metals. |
| c. | Arsenides & antimonides of heavy metals. |
| d. | Iron, cobalt and nickel. |
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Answer: (a).Arsenides of heavy metals.
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| 37. | Auto collimator is used to check |
| a. | flatness |
| b. | angle |
| c. | rotor balancing |
| d. | roughness |
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Answer: (b).angle
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| 38. | Area under the stress-strain curve upto the __________ is referred to as the modulus of resilience. |
| a. | yield strength |
| b. | elastic limit |
| c. | proportional limit |
| d. | maximum point |
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Answer: (c).proportional limit
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| 39. | __________ is the hardest oxide and is hence used where high wear resistance at high temperature is required. |
| a. | Beryllia |
| b. | Zirconia |
| c. | Alumina |
| d. | Magnesia |
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Answer: (c).Alumina
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| 40. | Titanium alloys are welded using the Following process: |
| a. | TIG welding. |
| b. | Submerged arc welding. |
| c. | Butt welding. |
| d. | Electron beam welding. |
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Answer: (a).TIG welding.
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