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单选题
Petroleum cargo tanks should not be topped off at deck level when loading on a cold day because（）.
A
a subsequent temperature rise will cause the cargo to overflow
B
air pockets may cause the cargo to bubble out of the ullage hole
C
the increased viscosity of the product requires higher loading pressure which increases the chances of a spill
D
the tank valve may be stiff and a spill will occur before the valve can be closed
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更多 “单选题Petroleum cargo tanks should not be topped off at deck level when loading on a cold day because（）.A a subsequent temperature rise will cause the cargo to overflowB air pockets may cause the cargo to bubble out of the ullage holeC the increased viscosity of the product requires higher loading pressure which increases the chances of a spillD the tank valve may be stiff and a spill will occur before the valve can be closed” 相关考题
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To determine which grades of cargo a tank vessel is permitted to carry you should ______.A.refer to the vessel's Certificate of InspectionB.examine the cargo tanks and fittingsC.ask the terminal supervisor or his representativeD.check the loading order
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You are loading a cargo of bagged coffee beans．To keep cargo leakage from being contaminated by the ship's structure，you should ______．A.use separation cloths between the deck and cargoB.place the cargo on a layer of spaced dunnageC.hose down the deck before loading the cargoD.use bag-on-bag stowage
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The tanks should then be ______ immediately after the measurements or cargo samples have been taken．A.topped upB.bracedC.tommed downD.re-pressurized
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Valves on steam-smothering lines to cargo tanks shall be set with ______．A.The master control valve shut and valves to individual cargo tanks shutB.The master control valve open and valves to individual cargo tanks shutC.The master control valve shut and valves to individual cargo tanks openD.All valves open
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Which spaces are required to be segregated from cargo tanks carrying grades A，B，C，or D cargoes ________．A.Pump roomsB.Enclosed deck spacesC.CofferdamsD.Navigation spaces
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When the inert gas pressure is being ______ in the cargo tanks，particular attention should be paid to obtaining an oxygen concentration．A.topped upB.bracedC.tommed downD.shored
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Freeing ports on a vessel with solid bulwarks ______.A.prevent stress concentration in the bulwarkB.permit easy jettison of deck cargo in an emergencyC.provide openings through the bulwarks for mooring linesD.allow water shipped on deck to flow off rapidly
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The （）(桶装货) should be loaded by cargo net.A、bagged cargoB、drummed cargoC、cased cargoD、deck cargo
考题
单选题If the overflow tank high-level alarm sounds while the fuel oil tanks are being topped off, the engineer should （）.A
close the static leg filling valveB
close the overflow tank falling valveC
reduce the fuel oil pumping rateD
stop the fuel oil pumping operation
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单选题Your vessel is damaged and is listing to port. The rolling period is short. There is sufficient freeboard so that deck edge submersion is not a problem. What corrective action should be taken FIRST in regard to the vessel’s stability?（）.A
Press up any slack double-bottom tanks to eliminate free surfaceB
Flood any empty double-bottom tanks to add weight low and downC
Jettison topside weights to reduce KG and KBD
Shift any off-center weights from port to starboard
考题
单选题You are cleaning the tanks after carrying a cargo of crude oil. Which statement is TRUE? （）A
Washing water should be recirculated if possible because it has the same electric potential as the cargo tank being cleanedB
The hoses to portable cleaning machines should be disconnected before the machines are removed from the tankC
The principal hazard with steaming cargo tanks is raising the ambient temperature above the flame point of the cargo residueD
Steam cleaning and water washing are both capable of generating electrostatic charges within a tank
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单选题A segregated ballast system is a system where （）A
all ballast is processed through the oily water separatorB
ballast is taken on and discharged through a separate main deck riserC
ballast and cargo tanks are separated by cofferdamsD
all ballast lines, tanks, and pumps are independent of those used for oil
考题
单选题To determine which grades of cargo a tank vessel is permitted to carry you should（）.A
refer to the vessel's Certificate of InspectionB
examine the cargo tanks and fittingsC
ask the terminal supervisor or his representativeD
check the loading order
考题
单选题It is possible，and sometimes necessary，to strengthen the deck of a vessel for carriage of deck cargo by（）.A
placing bunker on the deckB
building a stage on which to place the cargoC
welding steel feet to the deck，on which the cargo is placedD
erecting vertical pillars under the deck to support the cargo
考题
单选题A shore is a piece of securing dunnage that（）.A
runs from a low supporting level up to the cargo at an angleB
is also known as a distance pieceC
is placed on the deck under the cargo to distribute its weight eventlyD
is run horizontally from a support to the cargo
考题
单选题（）is not an advice be observed when samples are taken in tanks containing volatile petroleum products.A
Filter masks with a combination filter should be brought and used whenever necessaryB
Only explosion-proof equipment（marked EEx）should be usedC
Avoid breathing petroleum gases，especially if they come from sour crude（smell of rotten eggs）D
so far as possible，take early and substantial action to keep well clear
考题
单选题To avoid excessive pressures in the fuel oil filling system during bunkering, you should （）.A
close the tank filling valves quicklyB
top off all tanks at the same timeC
rill completely all tanks to less than 95% fullD
reduce the loading rate when topping off
考题
单选题Which material should NOT be used to secure cargo on deck for a voyage（）.A
Steel chainB
Wire ropeC
Steel strappingD
Fiber rope
考题
单选题To prevent the overflow of cargo tanks due to expansion, you should top off （）.A
to the bottom of the expansion trunkB
to within 1% to 3% of its capacityC
to within 1% to 3% inches of its capacityD
1 to 3 inches from top of the vent pipe
考题
单选题Why is it important for fuel oil tanks not to be topped off at the inner bottom level when loading on a cold day?（）A
Increased viscosity of the product needs higher loading pressure, which increases the chances of a spillB
Air pockets may cause the fuel to bubble out of the ullage holeC
The temperature rise of the fuel will cause an overflowD
Fueling valve may become stuck closed and cause the fuel oil to spill before the valve can be opened
考题
单选题During fueling operations, which of the listed precautions should be taken when topping off fuel tanks?（）A
Reduce the pumping rate by closing the deck filling valveB
Close all overflow valvesC
Place 5 gallon containers under all flange connections in the fuel lineD
Reduce the pumping rate and sound tanks frequently as the level rises
考题
单选题Freeing ports on a vessel with soild bulwards（）.A
prevent stress concentration in the bulwarkB
permit easy jettison of deck cargo in an emergencyC
provide opening through the bulwarks for mooring linesD
allow water shipped on deck to flow off rapidly
考题
单选题After fuel tanks have been topped off, which of the listed procedures should be followed next?（）A
The pressure-vacuum relief valve should be resetB
The tanks should be made seaworthy to prevent contaminationC
The tanks should be sounded to make sure the levels are not risingD
The tanks should be marked with a bull stamp on the manifold filling valve
考题
单选题Which statement is FALSE concerning precautions during fueling operations?（）A
All engines，motors，fans，etc. should be shut down when fuelingB
All windows，doors，hatches，etc. should be closedC
A fire extinguisher should be kept nearbyD
Fuel tanks should be topped off with no room for expansion
考题
单选题When possible，what should be the FIRST step in combating a fire on deck resulting from a cargo overflow or a leaking cargo line?（）A
Blanket the cargo spill with foamB
Prevent the spread of fire with a foam damC
Apply CO2 on burning fuel at its sourceD
Shut off the transfer of cargo
考题
单选题To determine which grades of cargo a tanker is permitted to carry you should（）.A
refer to the vessel's Certificate of InspectionB
examine the cargo tanks and fittingsC
ask the terminal supervisor or his representativeD
check the loading order
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