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You are discharging cargo and the inert gas system is in operation to inert the tanks. The pressure in a tank being discharged starts to drop below the allowable limit. What action should you take?

A.Cut in another IG fan to increase gas flow

B.Open the pressure control valve until the pressure increases

C.Open the tank isolation valve to the fully open position

D.Reduce the pumping rate


参考答案

更多 “ You are discharging cargo and the inert gas system is in operation to inert the tanks. The pressure in a tank being discharged starts to drop below the allowable limit. What action should you take?A.Cut in another IG fan to increase gas flowB.Open the pressure control valve until the pressure increasesC.Open the tank isolation valve to the fully open positionD.Reduce the pumping rate ” 相关考题
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考题 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 lostB.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 lostD.All of the above

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考题 When a non-volatile cargo is carried in a tank that has not been previously gas freed,then that tank shall ______.A.be purged with hydrocarbon gas prior to loadingB.be gas-freed after loading operationsC.not be maintained in an inert conditionD.be maintained in an inert condition

考题 Which statement about inert gas pressures in a cargo tank is TRUE ________.A.The pressures of the inert gas in the tank may create excessive pressure at the pump while dischargingB.Gas pressures should be maintained at the highest permissible level throughout the discharging processC.High gas pressures may cause pyrophoric oxidation in the tankD.High gas pressures may cause loss of suction when stripping

考题 The venting system shall be provided with devices to prevent the passage of ______ into the cargo tanks.A.flameB.inert gasC.airD.oil gas

考题 An inert gas system is designed to reduce the possibility of tank explosions by ______.A.eliminating sparks and fire in the vicinity of cargo tanksB.removing all hydrocarbon gases from the cargo tanksC.blanketing cargo tanks with inert foamD.reducing the oxygen concentration below levels necessary for combustion

考题 单选题During loading and discharging operations,in addition to when the cargo tanks have been properly filled,each inert gas system must be capable of maintaining a minimum gas pressure of().A 150 millimeters of water pressureB 125 millimeters of water pressureC 100 millimeters of water pressureD 75 millimeters of water pressure

考题 单选题The deck water seal of the inert gas system().A cools the inert gas and prevents soot from entering the cargo tanksB acts as an emergency system shutdown when the inlet pressures exceed the safe working pressure in the hazardous zoneC prevents the backflow of hydrocarbon gasses into nonhazardous areasD relieves sudden large overpressures in the system

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考题 单选题Inerting means().A the introduction of inert gas into a tank with the object of reducing the oxygen content to below 8% by volumeB the introduction of inert gas into a gas free tank for the purpose of reducing the oxygen content to below 8% by volumeC the introduction of inert gas into a cargo tank during cargo discharge to replace the volume of discharged cargoD All of the above

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考题 单选题The purpose of the deck seal in an inert gas system is to prevent().A flammable vapors from entering machinery spaceB flue gas escaping to atmosphereC inert gas escaping to atmosphereD air entering inert gas system

考题 单选题The combined fan discharge rate in an inert gas system is related to the().A shoreside loading rateB maximum cargo pump discharge rateC boiler forced draft fan rateD size of the largest cargo tank

考题 单选题The component in an inert gas system used for cleaning the gas of solid and sulphur combustion products,while simultaneously cooling the inert gas,is called the().A filterB coolerC scrubberD purifier

考题 单选题An inert gas system on a tanker should be used to().A prevent the generation of flammable or combustible gas in tanksB blow out cargo lines to prevent gas concentrationsC dilute tank atmospheres to keep gas concentrations below the lower explosive limitD prevent fires in the pumproom by continually displacing flammable vapors

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