Engine : Steam Plants - 549/811
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| The leakage of air into the pump casing by way of the packing gland of a condensate pump, is prevented by __________. |
| A) a water seal line to the packing gland |
| B) an air seal line from the compressed air line |
| C) special packing in the stuffing box |
| D) the vacuum in the pump suction |
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