By regulation，cargo tanks must be inert before and during wh

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

By regulation，cargo tank atmosphere must be inert before and during which operation ________．

A.Stripping

B.Loading

C.Cleaning

D.All of the above

An inert gas system installed on a tanker is designed to ______.

A.aid in the stripping and cleaning of cargo tanks

B.increase the rate of discharge of cargo

C.force toxic and explosive fumes from a cargo tank to vent to the outside atmosphere

D.lower the oxygen levels inside cargo tanks，making explosion nearly impossible

When the inert gas pressure is being ______ in the cargo tanks，particular attention should be paid to obtaining an oxygen concentration．

A.topped up

B.braced

C.tommed down

D.shored

Inerting means ______．

A.The introduction of inert gas into a tank with the object of reducing the oxygen content to below 8% by volume

B.The introduction of inert gas into a gas free tank for the purpose of reducing the oxygen content to below 8% by volume

C.The introduction of inert gas into a cargo tank during cargo discharge to replace the volume of discharged cargo

D.All of the above

In the case of new crude oil tankers，the additional ballast permitted shall be carried in cargo tanks only if such tanks have been ______ before departure from an oil unloading port or terminal.

A.inerted

B.crude oil washed

C.diluted

D.cleaned

Existing crude oil tankers may，______ being provided with segregated ballast tanks or operating with a cargo tank cleaning procedure using crude oil washing，operate with dedicated clean ballast tanks in accordance with the specified provision of the Regulation．

A.As per

B.In the consequence of

C.In accordance with

D.In lieu of

How does an inert gas system on a tanker function to prevent explosions in cargo tanks?

A.De-energizes the "charged mist" effect

B.Maintains a positive pressure on the vent header to cool the flammable vapors

C.Inert gas filters out the flammable vapors from the cargo tank spaces

D.Inert gas dilutes the flammable vapor and air concentrations to keep them below the lower explosive limit

The blowers of an inert gas generation system aboard a tanker，will be automatically secured if ______．

A.Normal water supply at the water seal is lost

B.The temperature of the inert gas being delivered to the cargo tanks is more than 150℉

C.The cooling water supply to the scrubbers is lost

D.All of the above

You are on a tanker designed to carry molten sulfur．Which statement is TRUE ________．

A.There must be two portable toxic vapor detectors on board

B.The cargo tank ventilation system must maintain the H2S vapor concentration at 1.85% or more by volume

C.Cargo temperature may be taken by portable thermometers

D.The pressure in the heating coils in the tanks must be less than that of the cargo exerted on them