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单选题
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.
A
hydraulic
B
electric
C
steam
D
diesel
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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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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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In Cargo Survey，T．C．V．refers to ______．A.total calculated volumeB.terminal cargo volumeC.tank cargo valveD.tolerance of cargo valve
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______ shall be provided in every cargo tank and slop tank in accordance with the appropriate Resolutions．A.A load on top systemB.Direct line systemC.Circle line systemD.An inert gas system
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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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The fitting at the end of a cargo line in a tank that allows suction to be taken close to the bottom of a tank is a ______．A.Suction endB.StrainerC.Bell-mouthD.Vacuum valve
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What is NOT a requirement of cargo piping installed in tank vessels carrying grade D or E cargo ONLY ________．A.The cargo piping system shall be fixedB.Flanged joints shall be used for pipe sizes exceeding 2 inches in diameterC.Piping through bunker spaces may be run through a pipe tunnelD.Connections at bulkheads must be made so that the plating does not form part of a flanged joint
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When a tank is to be gas freed after washing，the concentration of hydrocarbon vapour should be reduced by purging the inerted cargo tank with ______．A.the oxygenB.the gasC.the inert gasD.the hydrocarbon vapour
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______ of the following statements is（are）correct regarding motor lifeboats on cargo vessels．① The motor of each lifeboat shall be operated in the ahead and astern position for a period of not more than 5 minutes once in each week；② The fuel tank of all motor-propelled lifeboats shall be emptied and the fuel changed at least once in every year．A.① onlyB.② onlyC.Both ① and ②D.Neither ① nor ②
考题
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
考题
单选题The shut off valve at the gasoline tank which can be operated from outside the tank space （）.A
controls the amount of gasoline to the engineB
shuts off the gasoline supply at the tankC
is used if the gasoline tank leaksD
All of the above
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单选题What is NOT a responsibility of the tankerman in charge of loading an unmanned tank barge? （）A
Enforcement of smoking restrictionsB
Restricting vessels from coming alongside the bargeC
Insuring that a combustible gas indicator is aboardD
Protecting cargo hose with chafing gear
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Access to a cargo pumproom on a tank vessel carrying grades A，B，C or D liquid cargoes shall be（）.A
at least 13.1 feet away from the galleys，living quarters or navigation spacesB
from the open deckC
only from areas equipped with power ventilation systemsD
isolated from any part of the vessel which normally contains sources of vapor ignition
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
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单选题The term "load on top" is used on many crude oil carriers, is to provide a method for （）.A
calculating the ullage in the cargo tanksB
loading ballast by gravityC
the loading of new cargo into the slop tank as a procedure to minimize pollutionD
calculating the ratio of cargo expansion in a cargo tank
考题
单选题The FIRST course of action in fighting a fire in a cargo or fuel oil tank is to （）.A
secure all openings to the tankB
discharge an initial charge of CO2 with a hand portable extinguisherC
direct a fire hose into the tank and energize the fire mainD
spray the tank boundaries with a fire hose to promote cooling
考题
单选题Regulations require that pumprooms on tank vessels carrying grade C liquid cargo with machinery spaces below the freeboard deck be ventilated with（）.A
power ventilationB
gooseneck vents and flame screensC
at least two ducts extending to the weather deckD
a vent header system
考题
单选题In setting the valves on a steam-smothering system on a tank vessel，the master control valve to cargo tanks should be（）.A
open and individual tank valves openB
open and the individual tank valves closedC
closed and the individual tank valves closedD
closed and the individual tank valves open
考题
单选题According to regulations，access to a cargo pumproom in a tank vessel carrying grades C or D liquid cargo shall be（）.A
from areas equipped with power ventilationB
only from enclosed areas free from sources of vapor ignitionC
from the open deckD
from within the vessel
考题
单选题What action must be taken when an individual cargo tank is closed off from the inert gas system by the tank isolation valve?（）A
The tank must be gas freedB
The tank must be ballastedC
The tank must be vented to the atmosphereD
The bypass valve must also be closed
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
考题
单选题Several merchant ships are arriving at the scene of a distress incident. One of the them must assume the duties of the Coordinator Surface Search (CSS). Which of the following statements is TRUE? （）A
CSS duties are always assumed by passenger vessels，dry cargo vessels，or tankers in that order of precedenceB
The CSS must be established by mutual agreement between the ships concernedC
A tank vessel should never be assigned CSS duties unless only tank vessels are presentD
The first vessel to arrive at the distress incident is designated as the CSS
考题
单选题In setting the valves on a steam-smothering system on a tanker，the master control valve to cargo tanks should be（）.A
open and individual tank valves openB
open and the individual tank valves closedC
closed and the individual tank valves closedD
closed and the individual tank valves open
考题
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
考题
单选题Regulations require that tank vessels handling grade B liquids shall have their cargo pumps separated from all sources of vapor ignition by（）.A
cofferdamsB
empty cargo spacesC
gas tight bulkheadsD
areas equipped with power ventilation
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