Each ship having an inert gas system must have a portable in

Which of the listed functions is the purpose of a gas scrubber in an inert gas generation system ________．

A.Cools the inert gas

B.Maintains the oxygen content at 5% by volume

C.Drains off static electricity in the inert gas

D.Maintains the water seal on the gas main

What is NOT a requirement for the safe and effective use of a crude oil washing system ________．

A.Strip all tanks and remove the bottom residue

B.Use an inert gas system while washing tanks

C.Use portable washing machines to reach areas obscured by structural members in the tanks

D.Debottom the tank used as the source for the tank cleaning machines

Which method is used to supply inert gas from a flue gas system to the cargo tanks?

A.Exhaust gas pressure from the stack

B.High capacity fan

C.Inert gas compressor

D.Natural aspiration

Each ship having an inert gas system must have a portable instruments to measure concentrations of hydrocarbon vapor in inert atmospheres and also to measure ______.

A.nitrogen

B.oxygen

C.carbon dioxide

D.water vapor

You are planning to use the crude oil washing system on your tanker．What is required to prevent electrostatic buildup in the tanks ________．

A.The portable machines should be set at the proper drop for the first wash before the fixed machines are used

B.The tank used as the source for the tank cleaning machines should be debottomed for at least one meter

C.The inert gas system must reduce the oxygen content in the tank to at least 18%

D.The fixed machines must be operated simultaneously with the portable machines to equalize the electrostatic potential

The deck water seal of the inert gas system ______．

A.Cools the inert gas and prevents soot from entering the cargo tanks

B.Acts as an emergency shutdown when inlet pressures exceed the safe working pressure

C.Prevents the backflow of hydrocarbon gasses into nonhazardous areas

D.Relieves sudden large overpressures in the system

You are planning to use a crude oil washing system．What precaution must be taken with the tank as the source for the washing machines ________．

A.It must be debottomed and the level lowered by at least one meter

B.The oil in the source tank must be sampled for compatibility

C.The source tank must have been crude oil washed at least once in the past 150 days

D.The inert gas system must lower the oxygen content to a maximum of 12% oxygen in the tank

A vessel in ocean service that does not have an approved means of processing oily bilge slops or oily ballast must have ______.

A.a fixed piping system for ballast discharge to a reception facility

B.a discharge outlet for the ballast system on each side of the weather deck

C.one portable adapter for a shore connection to the ballast line

D.All of the above

Which statement is TRUE concerning inert gas systems on tankers ________．

A.Flue gases from the ship's boilers are used in some systems

B.The gas is helium

C.Using the system accelerates the rusting of the tanks

D.All of the above