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单选题
The oil is drawn from a drain tank through （）, one of a pair of pumps, into one of fine filters.
A
a strain tank
B
a head tank
C
a service tank
D
a strainer
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In the following statements about the principle of the low level controlling, which is WRONG? 0
A.Low level is monitored on the drain tank and header tank.B.If there is high differential the filters pressure across the circulatingpumps is alarmedC.The lubricating oil purifier cannot take oil from the drain tankD.If the sea water pressure falls, this also operates an alarm
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Which of the following problems can occur if you continually fail to drain off condensate from a starting air receiver?A.Corrosion and eventual failure of the tankB.Gumming of the tank relief valvesC.Immediate failure of components downstream of the compressed air systemD.Boiling of the water oil mixture as pressure is reduced
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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
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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
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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
考题
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
考题
单选题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
考题
单选题Your vessel is taking on bunkers from a shore side facility, if oil begins flowing from one tank vent, which of the following actions should be taken FIRST?（）A
Open the intake valve to an adjacent tankB
Set out drip pans and sawdust and begin to mop up the spillC
Signal the shore control point to shutdownD
Close the valve on the tank vent line
考题
单选题Fuel oil tank vents are fitted with a screen which will stop（）.A
oil from flowing out of the tank ventB
air from entering the tank ventC
vapors from leaving the tank ventD
flames on deck from entering the tank vent
考题
单选题The depth of fuel oil in a tank is normally measured through the（）A
vent lineB
overflow lineC
feed lineD
sounding tube
考题
单选题The amount of lubricating oil in the drain tank should be checked by （）.A
measuringB
sounding rodC
meteringD
weighting
考题
单选题（） is arranged for cleaning the lubricating oil in the system and clean oil can be provided from a storage tank.A
A filterB
A centrifugeC
A distillerD
A generator
考题
单选题When checking the oxygen content of the cargo tanks prior to loading cargoes requiring vapor recovery，the atmosphere must be sampled（）.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
考题
单选题Moisture is removed from a refrigeration system by（）.A
bleeding refrigerant from the condenserB
opening a drain petcock on the oil separatorC
condensing the water in the heat exchangerD
using a dehydrator cartridge
考题
单选题Lubricating oil for an engine is stored at the bottom of the （）, known as the sump or in a drain tank located beneath the engine.A
sea cheatB
air receiverC
crankcaseD
water box
考题
单选题（） system is arranged to ensure that water can be drawn from any tank or the sea and discharged to any other tank or the sea as required to trim the vessel.A
The domestic waterB
Bilge waterC
Oil transferD
The ballast
考题
单选题The lubricating oil is pumped from the drain tank, very often with （） in the suction line.A
a filterB
a strainerC
a magnetic filterD
a fine strainer
考题
单选题A vessel loads edible oil in a deep tank through a manhole at the midlength of the tank. In order to fill the tank to maximum capacity，what trim should the vessel have?（）A
Down by the bowB
Down by the sternC
Down by either the bow or sternD
In level trim
考题
单选题If an emergency pump control is used as the emergency shutdown on a tank vessel，it must（）.A
stop the flow of oil at the main deck manifoldB
prevent the oil from leaving the shore facilityC
prevent the oil from siphoning through the pumpD
None of the above
考题
单选题When making entries in the Oil Record Book, all quantifies should be（）.A
recorded as cubic meters with a conversion to barrelsB
verified by the Chief EngineerC
recorded directly from the oil discharge monitorD
consistently recorded through the Oil Record Book in one specified unit (gallons, barrels, cubic meters)
考题
单选题How dose water enter the crankcase of a diesel engine?（）A
Through the crankcase exhausterB
As water vapor contained in blow-byC
Demulsifying lube oil passing through the main bearingsD
Condensation from vapor formed in the expansion tank
考题
单选题The piston cooling system may employ similar components, except that a drain tank is used instead of a head tank That means this system （）.A
doesnt use a drain tank but a head tankB
uses a drain tank not head tankC
uses a drain tank and a head tankD
uses neither a drain tank nor a head tank
考题
单选题Which of the following problems can occur if you continually fail to drain off condensate from a starting air receiver?（）A
Corrosion and eventual failure of the tankB
Gumming of the tank relief valvesC
Immediate failure of components downstream of the compressed air systemD
Boiling of the water oil mixture as pressure is reduced
考题
单选题The cleaned heated oil, after passing through the centrifuges, is to be pumped to a （）.A
settling tankB
service tankC
ballast tankD
drain tank
考题
单选题Concerning the incinerator’s operation, which of the following is not correct?（）A
Scavenging time should be more 30 seconds before ignitingB
The temperature of sludge tank is 80~100℃C
First igniting the incinerator with diesel oil, when the temperature of health is about 600℃, the sludge oil drawn inD
The ash can be dumped into sea when the distance is more than 3 miles from land
考题
单选题The oil is drawn from a drain tank through （）, one of a pair of pumps, into one of fine filters.A
a strain tankB
a head tankC
a service tankD
a strainer
考题
单选题The construction of the main propulsion engine lube oil sump should （）A
have no plating joints of 90B
retain the lube oil as long as possible before it recirculates through the systemC
provided drain/return lines that are no greater than 24 inches from the pump suctionD
be provided with only a perfectly horizontal bottom
考题
单选题The lube oil in the bearings is drawn from a （）, usually located in the bedplate.A
tankB
sumpC
vesselD
bottle
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