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While testing a cargo tank，your oxygen indicator reads 25% oxygen in the tank. You would then ______.
A.enter the tank safely
B.suspect the accuracy of the reading
C.ventilate the tank
D.test for nitrogen
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更多 “ While testing a cargo tank，your oxygen indicator reads 25% oxygen in the tank. You would then ______.A.enter the tank safelyB.suspect the accuracy of the readingC.ventilate the tankD.test for nitrogen ” 相关考题
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Before entering a fuel tank that has been cleaned, it should be checked with an oxygen indicator and a/an ____.A.Orsat apparatusB.flame safety lampC.Halide torchD.combustible gas indicator
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An inert gas system installed on a tanker is designed to ______.A.aid in the stripping and cleaning of cargo tanksB.increase the rate of discharge of cargoC.force toxic and explosive fumes from a cargo tank to vent to the outside atmosphereD.lower the oxygen levels inside cargo tanks，making explosion nearly impossible
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The purpose of inert gas systems aboard tank vessels is to ______.A.allow sufficient oxygen in the tank to sustain lifeB.prevent outside air from entering the tankC.provide increase in cargo discharge pressureD.comply with double hull pollution prevention regulations
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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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Which statement about entry into a space that has been sealed for a long time is TRUE ________．A.A tank that has been used to carry hazardous liquids should be tested for oxygen content，toxicity，and explosive gasesB.You can safely enter the space without a breathing apparatus if the oxygen content exceeds 14%C.The natural ventilation through the installed vents is sufficient to provide the proper oxygen contentD.The heat of the sun on upper ballast tanks，such as in a bulk carrier，may generate carbon monoxide
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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 entryB.The tank must be tested at frequent intervals to ensure that hazardous gasses have not regeneratedC.The tank need not be tested for oxygen content if it is ventilated for more than 24 hoursD.If the oxygen content tests at less than 12% you should wear an approved gas mask
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You are testing a tank that contained gasoline by using a combustible gas indicator．Under testing，the tank sample caused the needle to move rapidly to 100 on the dial then fall to zero．What is the concentration of flammable gas ________．A.Less than the flammable rangeB.Within the flammable rangeC.Over the flammable rangeD.The explosimeter is defective and giving a false reading
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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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You are planning to use the crude oil washing system on your tanker．What is required to prevent electrostatic buildup in the tanks ________．A.The portable machines should be set at the proper drop for the first wash before the fixed machines are usedB.The tank used as the source for the tank cleaning machines should be debottomed for at least one meterC.The inert gas system must reduce the oxygen content in the tank to at least 18%D.The fixed machines must be operated simultaneously with the portable machines to equalize the electrostatic potential
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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
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Deficient oxygen content inside a chain locker can be detected with ______.A.litmus paperB.a combustible gas indicatorC.an oxygen breathing apparatusD.an oxygen indicator
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单选题The purpose of inert gas systems aboard tank vessels is to（）.A
allow sufficient oxygen in the tank to sustain lifeB
prevent outside air from entering the tankC
provide increase in cargo discharge pressureD
comply with double hull pollution prevention regulations
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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
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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
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单选题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
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单选题Deficient oxygen content inside a chain locker can be detected with（）.A
litmus paperB
a combustible gas indicatorC
an oxygen breathing apparatusD
an oxygen indicator
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单选题Before entering a fuel tank that has been cleaned, it should be checked with an oxygen indicator and a/an（）.A
Orsat apparatusB
flame safety lampC
Halide torchD
combustible gas indicator
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单选题A combination combustible gas and oxygen indicator is an instrument that measures the（） of both combustible gas and oxygen; each is indicated on a separate meter.A
purifiesB
combinationsC
concentrationsD
filters
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单选题An inert gas system installed on a tanker is designed to（）.A
aid in the stripping and cleaning of cargo tanksB
increase the rate of discharge of cargoC
force toxic and explosive fumes from a cargo tank to vent to the outside atmosphereD
lower the oxygen levels inside cargo tanks，making explosion nearly impossible
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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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单选题What would you consult to determine the number of persons required on duty while loading a cargo of leaded gasoline on your tanker? （）A
the Matitime Code of ChinaB
Certificate of InspectionC
Oil Transfer Procedures ManualD
IOPP Certificate
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单选题Your tank vessel is fully loaded, and you find that she is down slightly by the head. To adjust the trim, you may（）.A
add ballast aftB
load more cargo aftC
shift cargo aftD
All of the above
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单选题An oxygen indicator will detect （）.A
the amount of oxygen in a spaceB
the presence of harmful amounts of carbon monoxideC
concentrations of explosive gasD
All of the above
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单选题While testing a cargo tank，your oxygen indicator reads 25% oxygen in the tank. You would then （）.A
enter the tank safelyB
suspect the accuracy of the readingC
ventilate the tankD
test for nitrogen
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单选题How does the engine adjust itself to different formulas of fuel?A
By piping in more oxygen for ethanol.B
By sensing the amount of oxygen in a car’s exhaust.C
By burning in a less-than-optimal mode.D
By stopping and checking the fuel tank.
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