[单选题] Which of the following influences the position of the interface between the liquid seal and the oil in a purifier?

1、[单选题]A segregated ballast system is a system where _____.

• A、all ballast is processed through the oily water separator
• B、 ballast is taken on and discharged through a separate main deck riser
• C、 ballast and cargo tanks are separated by cofferdams
• D、 all ballast lines, tanks, and pumps are independent of those used for oil

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2、[单选题]According to Anneal I of MARPOL 73/78, the discharging oil content of the machinery space bilges must be lower than .

• A、30 liters per nautical mile
• B、 15 liters per nautical mile
• C、 30 ppm
• D、 15ppm

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3、[单选题]The objective of ISPS Code is .

• A、to protect the marine environment
• B、 to provide a method to avoid an accident
• C、 to protect the ship from collision
• D、 to keep terrorism action away from ships

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4、[单选题]New adopted regulation of master shall_____when maintaining the security of the ship.

• A、take actions by he company’ s order
• B、 take actions by the ship owner’ s order
• C、 exercise his professional judgment
• D、 exercise his professional judgment but be constrained by the company

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5、[单选题]Which of the followings is not an indication of a bad maintenance? _____________.

• A、a pipe with welded connections
• B、 a pipe with several clips
• C、 a cement box
• D、 a leaking valve

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