Before charging a refrigeration unit, the refrigerant charging lines should be（）

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• It is very necessary that each cylinder （） before the charged air is compressed.

  A . is scavenged B . is atomized with fuel oil C . be scavenged D . be atomized with fuel oil

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• If the broker’s lien of the bill of lading for his charges in respect of goods is not satisfied before the goods have reached their destination，he may have the goods（）home in order to retain his lien on them，and is not liable to any action for so doing.

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• The Master or person in charge of a ship is required to log（）.

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• It is very important that each cylinder should be （） scavenged before the charged air is compressed.

  A . well B . good C . excellent D . respectively

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• When a rescue vessel approaches a lifeboat in heavy seas，the person in charge of the lifeboat should（）.

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• You can determine that a C02 fire extinguisher is fully charged by（）.

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  A . water B . fresh air C . fuel oil D . ga

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  A:正确; B:错误

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