Deck : Deck General - 1476/5076
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| When is it acceptable to use power-driven or manually-operated spark producing devices in the pump room, where grades A, B, C, and D liquid cargoes are involved? |
| A) when the vessel is gas free |
| B) when all cargo tanks are empty |
| C) when all cargo tanks have been inerted |
| D) when the compartment itself is gas free |
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