| 26. | If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________ reactor. |
| a. | critical |
| b. | breeder |
| c. | fertile |
| d. | heterogenous |
| View Answer Report Discuss 50-50! |
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Answer: (b).breeder
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| 27. | Wrought iron is never shaped by |
| a. | casting |
| b. | cold working |
| c. | forging |
| d. | welding |
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Answer: (a).casting
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| 28. | Which one of the following is incombustible ? |
| a. | H₂ |
| b. | CCl₄ |
| c. | C₂H₂ |
| d. | S |
| View Answer Report Discuss 50-50! |
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Answer: (b).CCl₄
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| 29. | The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used. For general purpose cutter grinding __________ grinding wheel is normally used. |
| a. | hard |
| b. | soft |
| c. | silicon carbide |
| d. | aluminium oxide |
| View Answer Report Discuss 50-50! |
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Answer: (d).aluminium oxide
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| 30. | Tin based white metals are used, where bearings are subjected to |
| a. | high pressure & load. |
| b. | low pressure & load. |
| c. | high temperature. |
| d. | large surface wear. |
| View Answer Report Discuss 50-50! |
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Answer: (a).high pressure & load.
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