immediately above the level of the oil
at the top of the tank
in the vent riser
one meter from the deck
第1题：
What is used to test a tank for oxygen content ________．
A.Combustible gas indicator
B.Vapor indicator
C.Atmosphere analyzer kit
D.None of the above
第2题：
Which operation may cause the pressure in an inert tank to fall below the prescribed limits ________．
A.Loading
B.Discharging
C.Crude oil washing
D.Steaming tanks
第3题：
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
第4题：
The crude oil overflowed from measuring-hole due to ______ the valve of No.1 tank．
A.not close
B.not closing
C.not have closed
D.no closing
第5题：
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
第6题：
Which statement about entering into a tank which has been sealed for a long time is TRUE ________．
A.The tank should be tested only once to ensure the oxygen content is at least 14% before entry
B.The tank must be tested at frequent intervals to ensure that hazardous gasses have not regenerated
C.The tank need not be tested for oxygen content if it is ventilated for more than 24 hours
D.If the oxygen content tests at less than 12% you should wear an approved gas mask
第7题：
Every new crude oil tanker of 20 000 tons deadweight and above shall be fitted with a cargo tank cleaning system using ______．
A.Hot water
B.Cold water
C.Chemicals
D.Crude oil washing
第8题：
An oil tanker with dedicated clean ballast tanks shall have adequate tank capacity dedicated solely to the carriage of ______ as defined.
A.clean ballast
B.crude oil
C.fresh water
D.fuel oil
第9题：
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
第10题：
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