[单选题] If due to thick and hard deposits of carbon, the piston rings cannot move freely in their grooves, dark areas will often appear on the upper part of the cylinder wall (may not be the risible at port inspection) What condition of the piston rings can result in this phenomenon?

1、[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

• 点击查看答案
• 进入题库做题

2、[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

• 点击查看答案
• 进入题库做题

3、[单选题]Which of the following statements describes one of the functions of the ballast system?

• A、To permit flooding of any fuel oil storage tank on any class of ship
• B、 To use it as a secondary service system
• C、 To store reserve feed or potable water for extended cruises
• D、 To stabilize the ship by flooding certain designed tanks with seawater

• 点击查看答案
• 进入题库做题

4、[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

• 点击查看答案
• 进入题库做题

5、[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

• 点击查看答案
• 进入题库做题