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| Q. |
According to the Bureau of Indian Standards which type of LPG only contains butane in them? |
| A. | grade a |
| B. | grade b |
| C. | grade c |
| D. | grade d |
| Answer» A. grade a | |
| Explanation: grade a consist predominantly of butanes, butylene or mixture of butanes and butylene’s. this type of lpg are most suitable for use due to their moderate rate of combustion. | |
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