[单选题] Which of the following statements is not true concerning symptom of a fire in the scavenge air box?

1、[单选题]The main purpose of port State control is not to___________.

• A、prevent an unsafe ship proceeding to sea
• B、 prevent a ship threatening the marine environment
• C、 fine the ships
• D、 confirm a safe sailing

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2、[单选题]When the ship security alert system is activated, it shall not .

• A、initiate a ship-to-shore security alert
• B、 transmit a ship-to-shore security alert
• C、 initiate an alert identifying the ship, its location
• D、 raise a security alarm on-board the ship indicating that the ship is under threat

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3、[单选题]According to Annex V of MARPOL 73/78, the dunnage, lining and packing materials whichwill float can be discharged when the ship is more than______away from the nearest land.

• A、3 n mile
• B、 5 n mile
• C、 12 n mile
• D、 25 n mile

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4、[单选题]The abbreviation "GM" is used to represent the _____.

• A、height of the metacenter
• B、 fighting arm
• C、 righting moment
• D、 metacentric height

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5、[单选题]Which of the following is false? .

• A、A company should develop a SMS and implement it
• B、 A company implementing a SMS properly may obtain a DOC
• C、 Once a company obtains its DOC, each vessel of this company will obtain a SMC
• D、 DOC is valid for 60 months unless “major non-conformity” is found

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