Engine_2014 : Engineering Safety - 683/2355
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| Flame screens used on ullage openings prevent flames from entering a tank by __________ . |
| A) reducing the cross- sectional area of the opening |
| B) restricting the flow of gases through the opening |
| C) creating turbulence in the exiting gas stream |
| D) dissipating heat from the flame into the surrounding metal |
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