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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 apparatus
B
flame safety lamp
C
Halide torch
D
combustible gas indicator
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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
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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
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考题
单选题The pressure difference before and after the lube oil filter indicates （）the filter should be cleaned.A
whenB
howC
whereD
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考题
单选题Fuel oil tank vents are fitted with a screen which will stop（）.A
oil from flowing out of the tank ventB
air from entering the tank ventC
vapors from leaving the tank ventD
flames on deck from entering the tank vent
考题
单选题Before being used the fuel service tank should be drained of （）.A
soda solutionB
mechanical impuritiesC
ballastD
water and residuals
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open the bypass lineB
cut in the lube oil coolerC
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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Before welding is permitted on a fuel tank, it must be certified or declared （）A
safe for becoming roundedB
safe for hot workC
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考题
单选题Before entering or leaving a harbour, the ship should be given a （）(彻底) cleaning.A
throwB
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though
考题
单选题To receive oil residues from the purification of fuel and lubricating oils in the machinery spaces, what kind of tank(s) should be provided on board?（）A
bilge tankB
sludge tankC
overflow tankD
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单选题The sludge tank installed in the diesel engine room is used to collect（） Ⅰ.sludge from the fuel oil settling tanks ad centrifuge Ⅱ.water that has been collected in the settling tankA
ⅠonlyB
Ⅱ onlyC
bothⅠand ⅡD
neitherⅠor Ⅱ
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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A tank has been sealed and unventilated for a long period of timeWhich of the following conditions does this indicate?（）A
The tank is safe to enterB
The tank is especially dangerous to enterC
Carbon monoxide is presentD
Water vapor present when the tank was sealed has oxidized
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sounding the tankB
waiting for the vessel to listC
examining tank boundariesD
checking fuel oil strainers
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
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考题
单选题You are on a containership carrying a tank container that had been filled with sodium hydroxide solution. The container is empty but has not been cleaned. Which，if any，placard is required?（）.A
No placard is required; the tank openings must be sealedB
Empty placard with corrosive placardC
Residue label with the UN numberD
Black and white corrosive placard
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
all hatches should be opened and all compartments should be ventilatedD
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
单选题When restarting a heavy fuel diesel engine that has been stopped for some time, the engine should（）A
increase the starting air pressureB
use a higher than normal cranking speedC
increase the fuel injection pressureD
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考题
单选题In fighting a fire in a fuel tank, the FIRST action you should attempt is to （）.A
secure all sources of fresh air to the tankB
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top off the tank to force out all vaporsD
station someone at the fixed CO2 release controls
考题
单选题Before entering a tank，always check the vapor content（）a combustible gas indicator.A
withB
byC
ofD
for
考题
单选题Fuel injection valves should be taken out, cleaned, and lifting checked every （）.A
two to four monthsB
four to six monthsC
six to eight months
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