Deck : Deck General - 1254/5076
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| What is TRUE of pressure/vacuum valves? |
| A) They are designed to provide for the flow of small volumes of tank atmospheres caused by thermal variations in a cargo tank. |
| B) They should operate in advance of the pressure/vacuum breakers. |
| C) They should be kept in good working order by regular inspection and cleaning. |
| D) All of the above |
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