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单选题
Before welding is permitted on a fuel tank, it must be certified or declared （）
A
safe for becoming rounded
B
safe for hot work
C
not safe for personnel
D
not safe for hot work
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Before entering a fuel tank that has been cleaned, it should be checked with an oxygen indicator and a/an ____.A.Orsat apparatusB.flame safety lampC.Halide torchD.combustible gas indicator
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考题
Sometimes it is desirable to connect a member both by riveting and welding. Which statement is TRUE concerning this procedure?A.Tearing through the member is more likely in this type connectionB.The weld may be broken by the stresses caused by rivetingC.The weld increases the tensile stress on the rivet headsD.The welding must be completed before the riveting commences
考题
You are carrying triethylamine，methyl methacrylate and isoprene in your multiple-product tanker. Which of the following statements is true?A.Isoprene may be carried in a cargo tank adjacent to either of the other two cargoesB.Methyl methacrylate may not be carried in a tank adjacent to a pump roomC.Methyl methacrylate must usually be heated to maintain its stabilityD.Portable thermometers are not permitted to be used to take the cargo temperature of triethylamine
考题
By regulation，cargo tank atmosphere must be inert before and during which operation ________．A.StrippingB.LoadingC.CleaningD.All of the above
考题
What is NOT a requirement for the preparation of used，gasoline-propelled cars if they are to be carried as ordinary cargo and not as hazardous cargo ________．A.The engine must be run until it dies from lack of fuelB.The fuel tank must be inerted with CO2C.The ignition key may not be in the ignitionD.The vehicle must be inspected for fuel leaks
考题
Which statement about entering into a tank which has been sealed for a long time is TRUE ________．A.The tank should be tested only once to ensure the oxygen content is at least 14% before entryB.The tank must be tested at frequent intervals to ensure that hazardous gasses have not regeneratedC.The tank need not be tested for oxygen content if it is ventilated for more than 24 hoursD.If the oxygen content tests at less than 12% you should wear an approved gas mask
考题
Gasoline fuel tank vents should terminate ______．A.In the engine compartmentB.In the fuel tank spaceC.Above or outside the hullD.At the most convenient location
考题
You are planning to use the crude oil washing system on your tanker．What is required to prevent electrostatic buildup in the tanks ________．A.The portable machines should be set at the proper drop for the first wash before the fixed machines are usedB.The tank used as the source for the tank cleaning machines should be debottomed for at least one meterC.The inert gas system must reduce the oxygen content in the tank to at least 18%D.The fixed machines must be operated simultaneously with the portable machines to equalize the electrostatic potential
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
考题
单选题Sometimes it is desirable to connect a member both by riveting and welding. Which statement is TRUE concerning this procedure? （）A
Tearing through the member is more likely in this type connectionB
The weld may be broken by the stresses caused by rivetingC
The weld increases the tensile stress on the rivet headsD
The welding must be completed before the riveting commences
考题
单选题Before being used the fuel service tank should be drained of （）.A
soda solutionB
mechanical impuritiesC
ballastD
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考题
单选题How must each storage tank for helicopter fuel on a ship be marked?（）A
DANGER - KEEP AWAYB
DANGER - EXPLOSIVE VAPORSC
DANGER - NO SMOKINGD
DANGER - FLAMMABLE LIQUID
考题
单选题Your vessel has run aground and upon taking fuel oil tank soundings, you find that a fuel tank level has increasedYou therefore should suspect （）.A
condensation in the fuel tankB
a crack in the hull portion of the fuel tankC
a load of bad fuelD
contamination from the saltwater flushing system
考题
单选题You are carrying triethylamine，methyl methacrylate and isoprene in your multiple-product tanker. Which of the following statements is true? （）A
Isoprene may be carried in a cargo tank adjacent to either of the other two cargoesB
Methyl methacrylate may not be carried in a tank adjacent to a pump roomC
Methyl methacrylate must usually be heated to maintain its stabilityD
Portable thermometers are not permitted to be used to take the cargo temperature of triethylamine
考题
单选题Before a tank is to be crude oil washed，the oxygen content in the tank must be measured at a position（）.A
immediately above the level of the oilB
at the top of the tankC
in the vent riserD
one meter from the deck
考题
单选题The fuel from the bunker tanks must be treated by before entering the service tanks（）, from where the fuel enters（）A
centrifugal separators; the engine cylinderB
oily water separators; the engine cylinderC
oily water separators; the fuel supply systemD
centrifuges; the fuel supply system
考题
单选题By regulation，cargo tank atmosphere must be inert before and during which operation?（）A
StrippingB
LoadingC
CleaningD
All of the above
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If emergency welding repairs must be made to the upper area of a fuel tank, the tank and/or adjacent compartments may need to be （）A
gas freedB
inertedC
filled with waterD
all of the above as necessary
考题
单选题Before entering a fuel tank that has been cleaned, it should be checked with an oxygen indicator and a/an（）.A
Orsat apparatusB
flame safety lampC
Halide torchD
combustible gas indicator
考题
单选题Following a grounding, you can best determine that a SLACK fuel oil tank has been holed by （）.A
sounding the tankB
waiting for the vessel to listC
examining tank boundariesD
checking fuel oil strainers
考题
单选题Gasoline fuel tank vents should terminate（）.A
in the engine compartmentB
in the fuel tank spaceC
above or outside the hullD
at the most convenient location
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