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
Regulations require that cargo tanks carrying grades D or E liquids on tank barges be vented with ______．
A.Gooseneck vents and flame screens
B.Pressure-vacuum relief valves
C.Branch vent lines and a vent header
D.Forced draft blowers
相关考题：
An inert gas system installed on a tanker is designed to ______.A.aid in the stripping and cleaning of cargo tanksB.increase the rate of discharge of cargoC.force toxic and explosive fumes from a cargo tank to vent to the outside atmosphereD.lower the oxygen levels inside cargo tanks，making explosion nearly impossible
How does an inert gas system on a tanker function to prevent explosions in cargo tanks?A.De-energizes the "charged mist" effectB.Maintains a positive pressure on the vent header to cool the flammable vaporsC.Inert gas filters out the flammable vapors from the cargo tank spacesD.Inert gas dilutes the flammable vapor and air concentrations to keep them below the lower explosive limit
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
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
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
Regulations require that cargo pumps in tankers carrying grade D liquid cargo shall be isolated from sources of vapor ignition by ______．A.CofferdamsB.Gastight bulkheadsC.Passageways or living quartersD.General cargo spaces
Regulations require that cargo tanks in which grades B or C liquids are carried must be vented with which of the following ________．A.Gooseneck ventsB.Flame screensC.Pressure vacuum relief valvesD.Forced draft blowers
Which spaces are required to be segregated from cargo tanks carrying grades A，B，C，or D cargoes ________．A.Pump roomsB.Enclosed deck spacesC.CofferdamsD.Navigation spaces
单选题How does an inert gas system on a tanker function to prevent explosions in cargo tanks? （）ADe-energizes the charged mist effectBMaintains a positive pressure on the vent header to cool the flammable vaporsCInert gas filters out the flammable vapors from the cargo tank spacesDInert gas dilutes the flammable vapor and air concentrations to keep them below the lower explosive limit
单选题Regulations require that cargo pumprooms on tank barges (constructed in 1965) carrying grades B or C liquid cargoes have power ventilation systems which can completely change the air in （）.A1 minuteB3 minutesC5 minutesD10 minutes
单选题Regulations require that tankers handling grade B liquids shall have their cargo pumps separated from all sources of vapor ignition by（）.AcofferdamsBempty cargo spacesCgas tight bulkheadsDareas equipped with power ventilation
单选题You are cleaning the tanks after carrying a cargo of crude oil. Which statement is TRUE? （）AWashing water should be recirculated if possible because it has the same electric potential as the cargo tank being cleanedBThe hoses to portable cleaning machines should be disconnected before the machines are removed from the tankCThe principal hazard with steaming cargo tanks is raising the ambient temperature above the flame point of the cargo residueDSteam cleaning and water washing are both capable of generating electrostatic charges within a tank
单选题To determine which grades of cargo a tank vessel is permitted to carry you should（）.Arefer to the vessel's Certificate of InspectionBexamine the cargo tanks and fittingsCask the terminal supervisor or his representativeDcheck the loading order
单选题Access to a cargo pumproom on a tank vessel carrying grades A，B，C or D liquid cargoes shall be（）.Aat least 13.1 feet away from the galleys，living quarters or navigation spacesBfrom the open deckConly from areas equipped with power ventilation systemsDisolated from any part of the vessel which normally contains sources of vapor ignition
单选题According to regulations，access to a cargo pumproom in a tanker carrying grades C or D liquid cargo shall be（）.Afrom areas equipped with power ventilationBonly from enclosed areas free from sources of vapor ignitionCfrom the open deckDfrom within the vessel
单选题The system of valves and cargo lines in the bottom piping network of a tank vessel that connects one section of cargo tanks to another section is called a（）.AcrossoverBrunaroundCcome-alongDmanifold
单选题Regulations require that pumprooms on tank vessels carrying grade C liquid cargo with machinery spaces below the freeboard deck be ventilated with（）.Apower ventilationBgooseneck vents and flame screensCat least two ducts extending to the weather deckDa vent header system
单选题Regulations require that cargo pumps in tankers carrying grade D liquid cargo shall be isolatedfrom sources of vapor ignition by（）.AcofferdamsBgastight bulkheadsCpassageways or living quartersDgeneral cargo spaces
单选题Regulations require that cargo tanks carrying grades D or E liquids on tank barges be vented with（）.Agooseneck vents and flame screensBpressure-vacuum relief valvesCbranch vent lines and a vent headerDforced draft blowers
单选题Regulations require that access to a cargo pumproom in a tanker carrying grade D liquid cargo，shall be（）.Aaway from galleys，living quarters，or navigation spacesBonly from areas equipped with power ventilation systemsCfrom the open deckDisolated from sources of vapor ignition
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（）.Aopen and individual tank valves openBopen and the individual tank valves closedCclosed and the individual tank valves closedDclosed and the individual tank valves open
单选题According to regulations，access to a cargo pumproom in a tank vessel carrying grades C or D liquid cargo shall be（）.Afrom areas equipped with power ventilationBonly from enclosed areas free from sources of vapor ignitionCfrom the open deckDfrom within the vessel
单选题An inert gas system installed on a tanker is designed to（）.Aaid in the stripping and cleaning of cargo tanksBincrease the rate of discharge of cargoCforce toxic and explosive fumes from a cargo tank to vent to the outside atmosphereDlower the oxygen levels inside cargo tanks，making explosion nearly impossible
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The greatest effect on stability occurs from loose liquids flowing（）.Afrom side to side in the tanks of the vesselBfrom fore to aft in the tanks of a vesselCin and out of a vessel that is holed in a wing tankDin and out of a vessel that is holed in a peak tank
单选题On a vessel carrying grades A，B，C or D cargoes，enclosed spaces where sources of vapor ignition are normally present shall NOT be segregated from cargo tanks by（）.AcofferdamsBgalleysCpump roomsDtanks used to carry liquids having a flash point of 150°F or above
单选题Regulations require that tank vessels handling grade B liquids shall have their cargo pumps separated from all sources of vapor ignition by（）.AcofferdamsBempty cargo spacesCgas tight bulkheadsDareas equipped with power ventilation