MCQOPTIONS
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| 1. |
The flame propagation velocities range from _____________ |
| A. | 10 to 15 m/s |
| B. | 15 to 70 m/s |
| C. | 20 to 80 m/s |
| D. | 30 to 90 m/s |
| Answer» B. 15 to 70 m/s | |