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| Q. |
Which of the following represents the quality of straightness in precision engineering? |
| A. | spirit level |
| B. | straight edge |
| C. | autocollimator |
| D. | dial indicator |
| Answer» B. straight edge | |
| Explanation: at many places, it is necessary that the surface must be straight e.g. in lathe machine it is required that the tool must move in straight path. straight line is the basis of most methods of measurements. | |
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