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单选题
Movement of liquid in a tank when a vessel inclines causes an increase in（）.
A
righting arm
B
metacentric height
C
height of the uncorrected KG
D
natural rolling period
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The breath of the tankB
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考题
单选题The effects of free surface on a vessel’s initial stability do NOT depend upon the（）.A
volume of displacement of the vesselB
dimensions of the surface of the liquidC
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specific gravity of the liquid in the tank
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low in the vesselB
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completely fullD
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a tug comes alongside while the tanker is loading gradeB
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there is an electrical storm in the vicinityD
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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
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单选题You are on a container vessel. What concerning the handling and stowage of containerized hazardous materials is TRUE?（）.A
Open-bed containers may be used to transport hazardous materials if the cargo is properly securedB
A portable cargo tank of a flammable，cryogenic liquid may not be in transit for a period exceeding its marked rated holding time unless the liquid is inhibitedC
A portable cargo tank containing a cryogenic liquid must be shipped on deck unless forced ventilation is provided to the tween-decksD
A container loaded with packages of tear gas would display a placard reading Irritant
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it is overtaken by the towB
it is pulled sideways by the towC
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closed and the individual tank valves open
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from areas equipped with power ventilationB
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from the open deckD
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单选题To prevent damage by and to storage batteries aboardsmall passenger vessels they should be located（）.A
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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
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单选题You have berthed in a area with other tank vessels. What signal is displayed by a vessel to indicate it is transferring flammable or combustible liquid cargo?（）.A
A flashing yellow lightB
A red light visible all around the horizonC
A green light visible all around the horizonD
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单选题When checking the liquid level in a tank, you should position yourself （）.A
on the windward side of the openingB
on the leeward side of the openingC
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考题
单选题What is the principal danger from the liquid in a half full tank onboard a vessel?（）A
Corrosion from the shifting liquidB
Rupturing of bulkheads from the shifting liquidC
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Holing of the tank bottom from the weight of the shifting liquid
考题
单选题The effect of free surface on initial stability depends upon（）.A
the amount of liquid in the compartmentB
the dimensions of the liquid surface and the vessel's displacementC
only the length of the compartmentD
the vertical position of the liquid in the vessel
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单选题The effects of free surface on initial stability depend upon the dimensions of the surface of the free liquids and the（）.A
volume of liquid in the tankB
volume of displacement of the vesselC
location of the tank in the vesselD
height of the center of gravity of the vessel
考题
单选题A vessel is equipped with cross-connected deep tanks.In which situation should the crossconnection valve be closed?（）.A
The tank lie above the waterline and are filledB
The tank are partically filled with dry cargoC
The tanks are partially filled with liquid cargoD
The tanks are filled and lie below the waterline
考题
单选题Magnets are placed in horizontal trays in the compass binnacle to compensate for the（）.A
induced magnetism in the vessel's horizontal soft ironB
change in the magnetic field when the vessel inclines from verticalC
permanent magnetism of the vesselD
magnetic fields caused by electrical currents in the vicinity
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