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| Q. |
Which of the following could be used as fuel in propellant or rockets? |
| A. | Liquid Hydrogen + Liquid Nitrogen |
| B. | Liquid Oxygen + Liquid Argon |
| C. | Liquid Nitrogen + Liquid Oxygen |
| D. | Liquid Hydrogen + Liquid Oxygen |
| Answer» D. Liquid Hydrogen + Liquid Oxygen | |
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Explanation: LOX and liquid hydrogen, used in the Space Shuttle orbiter, the Centaur upper stage of the Atlas V, Saturn V upper stages, the newer Delta IV rocket, the H-IIA rocket, and most stages of the European Ariane rockets. Liquid fueled rocicets have higher specific impulse than solid rockets and are capable of being throttled, shut down, and restarted. Only the combustion chamber of a liquid fueled rocket needs to withstand high combustion pressures and temperatures and they can be regeneratively cooled by the liquid propellant. |
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