单选题On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.AhydraulicBelectricCsteamDdiesel
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
参考解析
解析：
暂无解析
相关考题：
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
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
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
In Cargo Survey，T．C．V．refers to ______．A.total calculated volumeB.terminal cargo volumeC.tank cargo valveD.tolerance of cargo valve
______ 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
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
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
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
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
______ 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
单选题The purpose of inert gas systems aboard tank vessels is to（）.Aallow sufficient oxygen in the tank to sustain lifeBprevent outside air from entering the tankCprovide increase in cargo discharge pressureDcomply with double hull pollution prevention regulations
单选题The shut off valve at the gasoline tank which can be operated from outside the tank space （）.Acontrols the amount of gasoline to the engineBshuts off the gasoline supply at the tankCis used if the gasoline tank leaksDAll of the above
单选题What is NOT a responsibility of the tankerman in charge of loading an unmanned tank barge? （）AEnforcement of smoking restrictionsBRestricting vessels from coming alongside the bargeCInsuring that a combustible gas indicator is aboardDProtecting cargo hose with chafing gear
单选题When measuring the oxygen content of the cargo tanks prior to loading cargoes requiring vapor recovery，check it（）.Aone meter from the tank bottom and one meter below the tank topBone half the ullage of the tank and one meter below the tank topCone half the ullage of the tank and one meter above the tank bottomDat three meter intervals from the tank top to the bottom
单选题Access to a cargo pumproom on a tank vessel carrying grades A，B，C or D liquid cargoes shall be（）.Aat least 13.1 feet away from the galleys，living quarters or navigation spacesBfrom the open deckConly from areas equipped with power ventilation systemsDisolated from any part of the vessel which normally contains sources of vapor ignition
单选题When checking the oxygen content of the cargo tanks prior to loading cargoes requiring vapor recovery，the atmosphere must be sampled（）.Aone meter from the tank bottom and one meter below the tank topBone half the ullage of the tank and one meter below the tank topCone half the ullage of the tank and one meter above the tank bottomDat three meter intervals from the tank top
单选题The term "load on top" is used on many crude oil carriers, is to provide a method for （）.Acalculating the ullage in the cargo tanksBloading ballast by gravityCthe loading of new cargo into the slop tank as a procedure to minimize pollutionDcalculating the ratio of cargo expansion in a cargo tank
单选题The FIRST course of action in fighting a fire in a cargo or fuel oil tank is to （）.Asecure all openings to the tankBdischarge an initial charge of CO2 with a hand portable extinguisherCdirect a fire hose into the tank and energize the fire mainDspray the tank boundaries with a fire hose to promote cooling
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（）.Apower ventilationBgooseneck vents and flame screensCat least two ducts extending to the weather deckDa vent header system
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（）.Aopen and individual tank valves openBopen and the individual tank valves closedCclosed and the individual tank valves closedDclosed and the individual tank valves open
单选题According to regulations，access to a cargo pumproom in a tank vessel carrying grades C or D liquid cargo shall be（）.Afrom areas equipped with power ventilationBonly from enclosed areas free from sources of vapor ignitionCfrom the open deckDfrom within the vessel
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?（）AThe tank must be gas freedBThe tank must be ballastedCThe tank must be vented to the atmosphereDThe bypass valve must also be closed
单选题Inerting means（）.Athe introduction of inert gas into a tank with the object of reducing the oxygen content to below 8% by volumeBthe introduction of inert gas into a gas free tank for the purpose of reducing the oxygen content to below 8% by volumeCthe introduction of inert gas into a cargo tank during cargo discharge to replace the volume of discharged cargoDAll of the above
单选题On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.AhydraulicBelectricCsteamDdiesel
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? （）ACSS duties are always assumed by passenger vessels，dry cargo vessels，or tankers in that order of precedenceBThe CSS must be established by mutual agreement between the ships concernedCA tank vessel should never be assigned CSS duties unless only tank vessels are presentDThe first vessel to arrive at the distress incident is designated as the CSS
单选题In setting the valves on a steam-smothering system on a tanker，the master control valve to cargo tanks should be（）.Aopen and individual tank valves openBopen and the individual tank valves closedCclosed and the individual tank valves closedDclosed and the individual tank valves open
单选题While testing a cargo tank，your oxygen indicator reads 25% oxygen in the tank. You would then （）.Aenter the tank safelyBsuspect the accuracy of the readingCventilate the tankDtest for nitrogen
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（）.AcofferdamsBempty cargo spacesCgas tight bulkheadsDareas equipped with power ventilation