If you are bunkering and you close off one tank in the line of tanks being filled,the rate of flow to other open tanks on the same line will ______.A.increaseB.decreaseC.stopD.remain constant

If you are bunkering and you close off one tank in the line of tanks being filled,the rate of flow to other open tanks on the same line will ______.

A.increase

B.decrease

C.stop

D.remain constant


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When you go across the line, you change your calendar one ______ day, back or ahead. A、allB、moreC、fullD、less

An alternator is being paralleled with one on the line At the instant the circuit breaker is close, the frequency of the incoming alternator will normallyA.increaseB.not changeC.decreaseD.be exactly 60 hertz

A precaution you should take before bunkering is to ______A.plug the ventsB.plug the sounding pipesC.plug the scuppersD.close the lids on the vents

In reference to accidental oil pollution,the most critical time during bunkering is when ______.A.you first start to receive fuelB.hoses are being blown downC.final topping off is occurringD.hoses are being disconnected

When measuring the oxygen content of the cargo tanks prior to loading cargoes requiring vapor recovery,check it ______.A.one meter from the tank bottom and one meter below the tank topB.one half the ullage of the tank and one meter below the tank topC.one half the ullage of the tank and one meter above the tank bottomD.at three meter intervals from the tank top to the bottom

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

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

The lockmaster has given you permission to tie off on the lower guide wall to wait your turn to lock through.What should you be most concerned with ________.A.A downbound vesselB.An upbound vesselC.Current reaction when the lock chamber is being emptiedD.Current reaction when the lock chamber is being filled

When loading a tanker,you should ______.A.load only one tank at a timeB.keep the seamen on watch on standby in the mess roomC.keep a strain on the loading hosesD.close valves by closing them down,reopening one or two turns,and re-closing

You are on a tanker discharging oil.When all of the oil that the main cargo pumps can handle is pumped out of a tank,the remainder is ______.A.Stripped out and pumped directly ashore into the mainline as the remaining cargo tanks are pumped out with the main pumpsB.Stripped to one tank and then pumped out with the main pumpsC.Stripped out and pumped directly ashore after all the tanks have been emptied by the main pumpsD.Gravitated to the centers from the wings and pumped out with the main pumps

You have completed a crude oil wash.What action should be taken with the oil in the lines running to the washing machines ________.A.Open a COW nozzle forward and one aft and drain the line into the after tank by gravityB.Blow the line out using compressed airC.Pull a suction using the supply line pumpD.Close off all valves in the system and leave the oil in the line primed for the next crude oil wash

单选题If the overflow tank high-level alarm sounds while the fuel oil tanks are being topped off, the engineer should ().Aclose the static leg filling valveBclose the overflow tank falling valveCreduce the fuel oil pumping rateDstop the fuel oil pumping operation

单选题To avoid excessive surge pressure when bunkering, you should ()Abunker at a normal rateBcheck for kinks in hoseCclose valves slowlyDshut valves before topping off

单选题When you are transferring fuel oil to the setting tanks, precautions to be observed should include ()Aplugging gooseneck tank vents to prevent accident overflowBmaintaining a high transfer rate until a slight trickle of oil is observed flowing from the overflow lineCsounding the tanks frequently and reducing the transfer rate as the level approaches maximum fillDmaintaining a supply of chemical dispersant to cleanup minor oil spills adjacent to the ship

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

单选题You are loading a cargo tank on your container ship. The tank displays the red label shown. Which statement is TRUE? ()AThe tank contains propyleneBThe tank's volume is 1077 cubic feetCThere are three tanks in the shipmentDThe tank contains an oxidizing material

单选题You are transferring fuel from the storage tanks to the day tanks by means of an electric fuel oil transfer pumpIf the pump motor catches fire, you would FIRST ().Asecure the fuel manifoldBshut off power to the pumpCshut off the power ventilationDspray water on the fire

单选题While underway and towing an unmanned tank barge you are required to().Amaintain a strict watch on the barge from the towing vesselBfly a red flag from the towing vesselCopen the tops of all empty tanks on the bargeDtake hourly soundings of any loaded tanks on the barge

单选题You may improve a vessels stability by ().Akeeping the fuel tanks topped offBincreasing the free surface effectCkeeping the fuel tanks at least half MIDkeeping at least one fuel tank empty for slops

单选题If you are bunkering and you close off one tank in the line of tanks being filled,the rate of flow to other open tanks on the same line will().AincreaseBdecreaseCstopDremain constant

单选题To avoid excessive pressures in the fuel oil filling system during bunkering, you should ().Aclose the tank filling valves quicklyBtop off all tanks at the same timeCrill completely all tanks to less than 95% fullDreduce the loading rate when topping off

单选题The safe rate of bunkering heavy fuel oil is directly related to the ().Atype of fuel transfer pump aboardBtemperature of the fuel oil being receivedCsize of the fuel storage tanks ashoreDdistance from the fuel oil storage tanks ashore

单选题Many vessels are provided with flume tanks,which also have a dump tank located under the flume tanks. In the event the ship is damaged,you could dump the flume tanks into the dump tank which would().Areduce the free surface effect and raise the KGBnot have any effect on free surface and raise the KGCreduce the free surface effect and lower the KGDnot have any effect on free surface and lower the KG

单选题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? ()ACut in another IG fan to increase gas flowBOpen the pressure control valve until the pressure increasesCOpen the tank isolation valve to the fully open positionDReduce the pumping rate

单选题The lockmaster has given you permission to tie off on the lower guide wall to wait your turn to lock through. What should you be most concerned with? ()AA downbound vesselBAn upbound vesselCCurrent reaction when the lock chamber is being emptiedDCurrent reaction when the lock chamber is being filled

单选题Portable fire extinguishers must be provided for the cargo tank area of an unmanned tank barge().Aonly when fully loadedBif one or more tanks are fullCwhen transferring cargoDonly when the barge is being towed

单选题A vessel is equipped with cross-connected deep tanks.In which situation should the crossconnection valve be closed?().AThe tank lie above the waterline and are filledBThe tank are partically filled with dry cargoCThe tanks are partially filled with liquid cargoDThe tanks are filled and lie below the waterline