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CIt is desirable to have screens on the vents of potable water tanks to ______．
A.Filter the incoming air
B.Prevent explosions
C.Prevent backups
D.Stop insects from entering
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更多 “ CIt is desirable to have screens on the vents of potable water tanks to ______．A.Filter the incoming airB.Prevent explosionsC.Prevent backupsD.Stop insects from entering ” 相关考题
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In no case shall ballast water be carried in cargo tanks，______ on those rare voyages when weather conditions are so severe that，in the opinion of the master，it is necessary to carry additional ballast water in cargo tanks for the safety of the ship.A.besidesB.in particularC.incase ofD.except
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Which statement is TRUE concerning protection of double bottom tanks against excessive pressure?A.Each vent for the tank must be equal to the area of the tank filling lineB.The tanks must be protected by overflowsC.The total area of the vents or the overflow shall be at least equal to the area of the fill lineD.There must be twice as much vent area as the area of the fill line
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You have water washed your cargo tanks using the fixed machines．What should you do before using portable machines to clean areas screened from the wash of the fixed machine by structural members ________．A.Ventilate the tank to eliminate any electrostatically charged mistB.Attach the water supply hose to the portable machine after the cleaning head is positioned inside the tankC.Insure that the tanks are not stripped until the final wash is startedD.Ground the fixed machines to eliminate any electrostatic buildup on the cleaning head
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The tops of vents from gasoline tanks should terminate ______．A.in open airB.inside cabinsC.in machinery spaceD.underwater
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Regulations require that cargo tanks carrying grades D or E liquids on tank barges be vented with ______．A.Gooseneck vents and flame screensB.Pressure-vacuum relief valvesC.Branch vent lines and a vent headerD.Forced draft blowers
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The capacity of the segregated ballast tanks shall be ______ determined that the ship may operate safely on ballast voyages without recourse to the use of cargo tanks for water ballast except as provided otherwise．A.SuchB.AsC.SoD.Well
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What represents poor sanitary procedures ________．A.Keep and use a separate filling hose for potable（drinking）waterB.Locate potable（drinking）water tanks as low as possible in the bilgeC.Eliminate enclosed spaces in which trash，food particles，dirt may gatherD.After washing dishes with soap and warm water，sterilize them in water of at least 170℉（76.7℃）
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During which condition should be operator of a pedestal crane shutdown operations?A.BunkeringB.High windsC.Potable water spill on deckD.More than 3°list
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水泥涂料用于淡水舱和双层底舱。（）A、Primer is used for sea water tanks and double bottom tanks.B、Cement wash is used for fresh water tanks and double bottom tanks.C、Varnish is used for fresh water tanks and double bottom tanks.D、Bitumen is used for fresh water tanks and double bottom tanks.
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单选题The abbreviation "TDS" about the potable water probably means （）.A
total dissolved solidsB
temperature of distillation of sea waterC
total dissolved sodiumD
total delivery system
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单选题During loading and discharging operations，in addition to when the cargo tanks have been properly filled，each inert gas system must be capable of maintaining a minimum gas pressure of（）.A
150 millimeters of water pressureB
125 millimeters of water pressureC
100 millimeters of water pressureD
75 millimeters of water pressure
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单选题The tops of vents from gasoline tanks should terminate（）.A
in open airB
inside cabinsC
in machinery spaceD
underwater
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单选题Which of the listed chemicals can be routinely used to maintain the hygienic quality of potable water?（）A
Hydrochloric acidB
ChlorineC
Sulfuric acidD
Zinc chromate
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单选题Vents are led from the engine to the head tank for the release of （） from the cooling water.A
airB
heatC
sludgeD
steam
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单选题Regulations require that cargo tanks carrying grades D or E liquids on tank barges be vented with（）.A
gooseneck vents and flame screensB
pressure-vacuum relief valvesC
branch vent lines and a vent headerD
forced draft blowers
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单选题Normally，potable water systems are connected directly to the（）.A
fire-main systemB
feed-water systemC
freshwater sanitary systemD
domestic water tank
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单选题According to the regulations，to prevent excessive pressure buildup in cargo tanks containing LFG，they are fitted with（）.A
pressure vacuum relief valvesB
excess flow valvesC
safety relief valvesD
flame screens
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单选题Distilled water from an evaporator may be discharged into a potable water tank （）.A
through a detachable hose connectionB
after passing through an activated charcoal filterC
after chemical analysis shows it is fit for consumptionD
through a solenoid operated three-way valve
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单选题Most covered lifeboats will right themselves after capsizing if the（）.A
passengers are strapped to their seatsB
fuel tanks are not less than half fullC
sea anchor is deployed to windwardD
lower ballast tanks are filled with water
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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
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单选题Where should the tops of vents from gasoline tanks terminate?（）.A
In open airB
Inside cabins near the overheadC
In the machinery space near the engine air intakeD
Underwater
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单选题“Any leaks in piping, propeller shaft, machinery, tanks, will have to be repaired, or at least patched up temporarily until the next stop” This sentence means that （）.A
Any leaks in piping, propeller shaft, machinery, tanks, will have to be repaired on the spotB
Any leaks in piping, propeller shaft, machinery, tanks, will have to be repaired on the next port of callC
Any leaks in piping, propeller shaft, machinery, tanks, will have to be repaired until the next stopD
Any leaks in piping, propeller shaft, machinery, tanks, will have to be at least patched up
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单选题Sufficient cargo tanks shall be（）prior to each ballast voyage in order that，taking into account the tanker’s trading pattern and expected weather conditions，ballast water is put only into cargo tanks which have been crude oil washed.A
inertedB
crude oil washedC
gas freedD
batterned down
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单选题Which of the following statements describes one of the functions of the ballast system?（）A
To permit flooding of any fuel oil storage tank on any class of shipB
To use it as a secondary service systemC
To store reserve feed or potable water for extended cruisesD
To stabilize the ship by flooding certain designed tanks with seawater
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单选题Which statement is TRUE concerning protection of double bottom tanks against excessive pressure? （）A
Each vent for the tank must be equal to the area of the tank filling lineB
The tanks must be protected by overflowsC
The total area of the vents or the overflow shall be at least equal to the area of the fill lineD
There must be twice as much vent area as the area of the fill line
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单选题（）provides strength and strong space for fule,lubricating oil,fresh water,salt(ballast)water and potable water.A
The double bottomB
The cofferdamC
The navigating bridgeD
The superstructure
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单选题After extinguishing a paint locker fire using the fixed CO2 system，the next action is to have the space（）.A
opened and burned material removedB
left closed with vents off until all boundaries are coolC
checked for oxygen contentD
doused with water to prevent reflash
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