Which statement is TRUE concerning the ventilation of engine and fuel tank compartments on uninspected towing vessels using fuel with a flash point of 100°F?A.There shall be at least 3 ventilator ducts open to the atmosphereB.At least one exhaust duct shall extend from the open atmosphere to the lower portion of the bilgeC.At least one intake duct shall extend from the open atmosphere to the lower portion of the bilgeD.Only vessels using fuel with a flash point above 110°F need ventilate engine and fuel compartments
Which statement is TRUE concerning the ventilation of engine and fuel tank compartments on uninspected towing vessels using fuel with a flash point of 100°F?
A.There shall be at least 3 ventilator ducts open to the atmosphere
B.At least one exhaust duct shall extend from the open atmosphere to the lower portion of the bilge
C.At least one intake duct shall extend from the open atmosphere to the lower portion of the bilge
D.Only vessels using fuel with a flash point above 110°F need ventilate engine and fuel compartments
相关考题：
Which of the following is the stated proper sequence before commencing cargo operations aboard Ro-Ro vessels?A.Start ventilation，lower the ramp，notify engine roomB.Lower the ramp，start ventilation，notify engine roomC.Notify engine room，lower the ramp，start ventilationD.Start ventilation，notify engine room，lower the ramp
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
Which statement is TRUE concerning the flash point of a substance ________．A.It is lower than the ignition temperatureB.It is the temperature at which a substance will spontaneously igniteC.It is the temperature at which a substance，when ignited，will continue to burnD.It is the temperature at which the released vapors will fall within the explosive range
Which statement about entry into a space that has been sealed for a long time is TRUE ________．A.A tank that has been used to carry hazardous liquids should be tested for oxygen content，toxicity，and explosive gasesB.You can safely enter the space without a breathing apparatus if the oxygen content exceeds 14%C.The natural ventilation through the installed vents is sufficient to provide the proper oxygen contentD.The heat of the sun on upper ballast tanks，such as in a bulk carrier，may generate carbon monoxide
Which statement is correct concerning the carriage of coal in bulk ________．A.Coal should be vented with surface ventilation onlyB.Because of its inherent vice，coal should not be loaded wetC.Dunnage should be placed against ship's sides and around stanchionsD.Through ventilation，as well as surface ventilation，should be provided whenever possible
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
Which statement is TRUE concerning deep well self-priming pumps ________．A.When loading oil cargo，it is always loaded via the discharge line through to the pump until the tank is topped offB.Stripping systems are generally eliminated for the purposes of cargo handlingC.In recent years deep well pumps have become increasingly unpopular in product tankers and medium size crude shipsD.There is no danger of damaging the pump from overheating
You are on a tanker designed to carry molten sulfur．Which statement is TRUE ________．A.There must be two portable toxic vapor detectors on boardB.The cargo tank ventilation system must maintain the H2S vapor concentration at 1.85% or more by volumeC.Cargo temperature may be taken by portable thermometersD.The pressure in the heating coils in the tanks must be less than that of the cargo exerted on them
Which statement about the DVS engine is true？（）A、the DVS engine can useWebroot and McAfee scanning in parallelB、the DVS engine generates the WBRSC、the DVS engine never inspects the client HTTP requestD、the DVS engine is only used for Layer 4 traffic monitoring
单选题Which of the following is the stated proper sequence before commencing cargo operations aboard Ro-Ro vessels?（）AStart ventilation，lower the ramp，notify engine roomBLower the ramp，start ventilation，notify engine roomCNotify engine room，lower the ramp，start ventilationDStart ventilation，notify engine room，lower the ramp
单选题You are loading a cargo tank on your container ship. The tank displays the red label shown. Which statement is TRUE? （）AThe tank contains propyleneBThe tank's volume is 1077 cubic feetCThere are three tanks in the shipmentDThe tank contains an oxidizing material
单选题Which statement is TRUE concerning the gooseneck（）.AIt is a sailing maneuver which brings the vessel's head through the windBIt connects the boom to the mast and allows the boom to swing freelyCIt is a sailing condition where there is a loss of air flow over the sailsDNone of the above
单选题You are on a containership. Which statement about the stowage of hazardous materials in containers is TRUE?（）.AThe containers provide automatic segregation of hazardous materials except for class A explosivesBAll packages within a container must be marked This End Up to indicate the correct stowageCA refrigerated container with a fuel tank containing a flammable liquid must be stowed on deckDPackages of liquids within a container should be stowed on top of packages of solids to prevent crushing
单选题When ship navigating in rough sea, the first measure taken by the chief engineer to prevent the overload should be（）Acleaning fuel oil, lubricating oil and seawater filterBreducing fuel feeding of the main engine appropriately or reducing the pitch angle of propellerCusing low sea chestDclosing the skylight and the ventilation opening, which doesn’t affect the normal work of equipments
单选题Which of the following statements is true concerning the cetane number rating of diesel fuel? （）AThe cetane number is obtained by comparing the fuel with cetane a colorless liquid hydrocarbonBThe higher the cetane number, the shorter the ignition lagCThe highest cetane number of fuel is 100DAll of the above
单选题Which statement is TRUE concerning the ventilation of engine and fuel tank compartments on uninspected towing vessels using fuel with a flash point of 100°F?（）AThere shall be at least 3 ventilator ducts open to the atmosphereBAt least one exhaust duct shall extend from the open atmosphere to the lower portion of the bilgeCAt least one intake duct shall extend from the open atmosphere to the lower portion of the bilgeDOnly vessels using fuel with a flash point above 110°F need ventilate engine and fuel compartments
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 （）Agas freedBinertedCfilled with waterDall of the above as necessary
单选题Which step is NOT generally taken when gas-freeing a tank?（）.AWashing the tank interior with sea waterBApplication of degreasing solventsCRemoval of corrosion products and sludgeDFresh air ventilation
单选题Which of the following is true about the fuel injection with an ordinary diesel engine?（）AThe process begins after TDCBThe process ends before TDCCWhen the piston is near to the TDC the fuel injection endsDNone of the above is true
单选题Which statement about the DVS engine is true？（）Athe DVS engine can useWebroot and McAfee scanning in parallelBthe DVS engine generates the WBRSCthe DVS engine never inspects the client HTTP requestDthe DVS engine is only used for Layer 4 traffic monitoring
单选题Which of the following statements concerning fuel atomization in a diesel engine cylinder is correct?（）AThe greater the atomization, the greater the penetrationBThe greater the atomization, the less the penetrationCThe degree of atomization has nothing to do with the degree of penetrationDAtomization and penetration are one and the same
单选题When fueling has been completed（）.Athe fuel tank fill pipe should be left open to allow vapors to vent from the tankBthe engine should be started immediately to prevent vapor lock in the fuel lineCall hatches should be opened and all compartments should be ventilatedDopen the fuel line and drain a small amount of gasoline into the bilge to clear the line of sediment
单选题Which statement is TRUE concerning gasoline vapors on board a vessel（）.AThey are heavier than air and will settle in the lowest part of the vesselBThey are lighter than air and will settle in the highest part of the vesselCThey should be vented into the engine to improve combustionDThey should be vented into the wheelhouse
单选题Gasoline fuel tank vents should terminate（）.Ain the engine compartmentBin the fuel tank spaceCabove or outside the hullDat the most convenient location
单选题Which statement concerning Montauk Point Light is TRUE（）.AThe light comes on at sunsetBThere is an emergency light if the main light is extinguishedCThe height of the light is 24 feetDThe tower is painted with black and white stripes
单选题Which statement is TRUE concerning protection of double bottom tanks against excessive pressure? （）AEach vent for the tank must be equal to the area of the tank filling lineBThe tanks must be protected by overflowsCThe total area of the vents or the overflow shall be at least equal to the area of the fill lineDThere must be twice as much vent area as the area of the fill line
单选题Which statement is TRUE concerning fuel vapors on a vessel（）.AFuel vapors gather in the lowest portions of the vesselBFuel vapors can only be ignited by an open flameCVent outlets should be located above the level of the carburetor air intakeDNone of the above
单选题Which statement is TRUE concerning spare charges for portable fire extinguishers on unmanned tank barges?（）.ASpare charges shall be carried for at least 50 percent of each size and variety required on boardBIf the unit cannot be charged by the vessel's personnel，one spare unit shall be carried in lieu of spare chargesCSpare charges shall be stowed in watertight containers on deckDRegulations concerning spare charges do not apply to unmanned barges