单选题Crude oil washing of cargo tanks has the following advantages except for （）A reducing the erosion of the cargo tanksB increasing the total quantity of oil to carryC reducing the quantity of water contained in oilD reducing cargo discharged time

单选题A SYSTEM OF CLEANING THE TANKS BY WASHING THEM WITH THE CARGO OF CRUDE OIL WHILE IT IS BEING DISCHARGED is known as（）.A COWB LOTC CBTD coferdam

单选题By regulation，cargo tanks must be inert before and during what operation?（）.A StrippingB LoadingC CleaningD Crude oil washing

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 meterB.The oil in the source tank must be sampled for compatibilityC.The source tank must have been crude oil washed at least once in the past 150 daysD.The inert gas system must lower the oxygen content to a maximum of 12% oxygen in the tank

单选题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 inertedB crude oil washedC dilutedD cleaned

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 residueB.Use an inert gas system while washing tanksC.Use portable washing machines to reach areas obscured by structural members in the tanksD.Debottom the tank used as the source for the tank cleaning machines

单选题The complete details of a crude oil washing system aboard your vessel，including the operating sequences and procedures，design characteristics，a description of the system，and required personnel will be found in the（）.A Oil Transfer Procedures ManualB Crude Oil Washing Operations and Equipment ManualC Code of Federal RegulationsD Crude Oil Washing addendum to the Certificate of Inspection

单选题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 perB in the consequence ofC in accordance withD in lieu of

单选题The port State control officer will ensure that（）is performed by all crude carriers either required to have a crude oil washing system or where the owner or operator chooses to install a crude oil washing system.A cargo loading operationsB cargo unloading operationsC cargo control operations in the transportD crude oil washing

材料：Every new crude oil tanker of 20000 tons deadweight and above and every new product carrier of 30000 tons deadweight and above shall be provided with segregated ballast tanks．The capacity of the segregated ballast tanks shall be so determined that the ship may operate safely on ballast voyages without recourse to the use of cargo tanks for water ballast．In all cases，however，the capacity of segregated ballast tanks shall be at least such that，in any ballast condition at any part of the voyage，including the conditions consisting of lightweight plus segregated ballast only，the ship’s draughts and trim can meet each of the following requirements：（a）The moulded draught amidships（dm）meters（without taking into account any ship&39;s deformation）shall not be less than dm = 2.0 + 0.02L；（b）The draughts at the forward and after perpendiculars shall correspond to those determined by the draught amidships（dm）as specified in sub-paragraph（a）of this paragraph，in association with the trim by the stern of not greater than 0.015L；and（c）In any case the draught at the after perpendicular shall not be less than that which is necessary to obtain full immersion of the propeller．In no case shall ballast water be carried in cargo tanks，except on those rare voyages when weather conditions are so severe that，in the opinion of the master，it is necessary to carry additional ballast water in cargo tanks for the safety of the ship，or，in exceptional cases where the particular character of the operation of an oil tanker renders it necessary to carry ballast water in excess of the quantity required，provided that such operation of the oil tanker falls under the category of exceptional cases as established by the Organization．问题：According to this passage，it is inferred that ________．A.the crude oil is more pollutive than the productB.the crude oil is less pollutive than the productC.the crude oil and the product are equally pollutiveD.it can not tell whether the crude oil or the product is more pollutiveBallast water ________ carried in cargo tanks on board of oil tankers．A.can beB.can not beC.can not，absolutely，beD.can，only in rare or exceptional cases，beThis passage is most likely extracted from ________．A.Guide to Port EntryB.Notices to MarinersC.SOLASD.MARPOLAssuming the length of a crude oil tanker is 200m，her max aft draft corresponding to her displacement of lightweight plus segregated ballast only should be ________．A.3mB.4.5mC.6mD.7.5m请帮忙给出每个问题的正确答案和分析，谢谢！

单选题You are cleaning the tanks after carrying a cargo of crude oil. Which statement is TRUE? （）A Washing water should be recirculated if possible because it has the same electric potential as the cargo tank being cleanedB The hoses to portable cleaning machines should be disconnected before the machines are removed from the tankC The principal hazard with steaming cargo tanks is raising the ambient temperature above the flame point of the cargo residueD Steam cleaning and water washing are both capable of generating electrostatic charges within a tank

Crude oil washing of cargo tanks has the following advantage

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