MCQOPTIONS
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				| 1. | 
                                    Which one of the following values is nearer to the vacuum specific impulse of a rocket engine using liquid hydrogen and liquid oxygen as propellants? | 
                            
| A. | 49 sec | 
| B. | 450 sec | 
| C. | 6000 sec | 
| D. | 40000 sec | 
| Answer» C. 6000 sec | |