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| Q. |
defects in castings cannot be identified easily. |
| A. | internal |
| B. | external |
| C. | chemical |
| D. | metallic |
| Answer» A. internal | |
| Explanation: the casting is usually made in bulk in foundries and it is not visible to the naked eyes. the castings have to be sent for x-ray testing and such kind of test to find out the internal defects. identifying internal defects is a tough task in foundries. | |
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