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单选题
How should cargo tank hatches be protected when the ullage opening is open and the tank NOT gas free?（）.
A
With gooseneck vents
B
With warning signs
C
With flame screens
D
With pressure-vacuum relief valves
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How should cargo tank hatches be protected when the ullage opening is open and the tank NOT gas free?A.With gooseneck ventsB.With warning signsC.With flame screensD.With pressure-vacuum relief valves
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What refers to the depth of a petroleum product in a tank ________．A.InnageB.OutageC.ThievageD.Ullage
考题
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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Which statement about inert gas pressures in a cargo tank is TRUE ________．A.The pressures of the inert gas in the tank may create excessive pressure at the pump while dischargingB.Gas pressures should be maintained at the highest permissible level throughout the discharging processC.High gas pressures may cause pyrophoric oxidation in the tankD.High gas pressures may cause loss of suction when stripping
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When cleaning a tank by the Butterworth process，you should begin to pump out the slops ______．A.At the end of the drop scheduleB.When the process is startedC.When the process is finishedD.When the tank is clean
考题
单选题0il product samples should be taken from the（）.A
dock riserB
ships cargo tanksC
shore tank dischargeD
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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
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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 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
考题
单选题Once a vessel has loaded packaged hazardous cargo，the cargo spaces shall be inspected. The spaces shall also be inspected at least once in every 24 hours. The only exception to daily inspection is when（）.A
a vessel is equipped with an automatic smoke or fire detecting systemB
the cargo hatches are of steel constructionC
the cargo is of a nonflammable typeD
there is sufficient fire protection located on the main deck adjacent to the cargo hatch
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
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
考题
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
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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
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closed and the individual tank valves closedD
closed and the individual tank valves open
考题
单选题When carrying a cargo of asphalt or molten sulfur，which are carried at temperatures of over 300°F，one of the biggest dangers is（）.A
water in the tanks or pipelinesB
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explosion of vapors after dischargeD
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考题
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考题
单选题A bonding cable should be connected for cargo operations aboards a tank vessel as soon as the（）.A
cargo has been loaded or dischargedB
cargo ghose is connectedC
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vessel is ready to handle cargo
考题
单选题When fueling has been completed（）.A
the fuel tank fill pipe should be left open to allow vapors to vent from the tankB
the engine should be started immediately to prevent vapor lock in the fuel lineC
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open the fuel line and drain a small amount of gasoline into the bilge to clear the line of sediment
考题
单选题Oil product samples should be taken from the（）.A
dock riserB
ship's cargo tanksC
shore tank dischargeD
All of the above
考题
单选题How should the letter O be pronounced when spoken on the radiotelephone?（）A
OCK TOW BERB
O RI ANC
OSS CAHD
OA KAM
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Portable fire extinguishers must be provided for the cargo tank area of an unmanned tank barge（）.A
only when fully loadedB
if one or more tanks are fullC
when transferring cargoD
only when the barge is being towed
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