Engine : Expired / Motor Plants and Auxiliary Boilers - 751/354
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| In a direct cylinder admission air starting system, once the engine begins to fire, the air starting check valve illustrated, is closed by __________. MO-0107 |
| A) a pneumatic bellows assembly |
| B) the starting air pressure |
| C) a valve actuating cam |
| D) the spring force and cylinder pressure |
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Illustration MO-0107
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