Which instrument is suitable for determining the presence of explosive concentrations of fuel oil vapors in tanks ________．A.A flame safety lampB.A combustible gas indicatorC.A liquid cargo meterD.All of the above
Which instrument is suitable for determining the presence of explosive concentrations of fuel oil vapors in tanks ________．
A.A flame safety lamp
B.A combustible gas indicator
C.A liquid cargo meter
D.All of the above
相关考题：
The critical path is calculated byA.subtracting the end date of task one from the start date of task two.B.determining which tasks have the least amount of total slack.C.totaling the time for all activities.D.determining the shortest path through the network.E.Determining which tasks have the most slack
● The critical path is calculated byA subtracting the end date of task one from the start date of task two.B determining which tasks have the least amount of total slack.C totaling the time for all activities.D determining the shortest path through the network.E Determining which tasks have the most slack
听力原文：M: If an instrument is payable to the order of both A and B who are not partners, what should they do?W: Both of them must endorse, unless one has authority to endorse for the other.Q: Which of the following is not right according to the woman?(18)A．Both endorse the instrument.B．Neither of them endorses the instrument.C．A authorizes B to endorse the instrument.D．B authorizes A to endorse the instrument.
The lowest temperature at which the vapor formed from a liquid ignites and continues to burn steadily in the presence of an ignition source is called the( ). A.flash pointB.fire pointC.upper explosive limitD.lower explosive hmlt
An inert gas system on a tanker should be used to ______.A.prevent the generation of flammable or combustible gas in tanksB.blow out cargo lines to prevent the build up of gas concentrationsC.dilute tank atmospheres to keep gas concentrations below the lower explosive limitD.prevent fires in the pumproom by continually displacing flammable vapors
A bill of lading could be which of the following？ ______. ① A contract ② A receipt ③ A negotiable instrument．A.I and ③ onlyB.② and ③ onlyC.② and ③ onlyD.①，② and ③
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
Atmospheres laden with coal dust or grain dust caused by loading these cargoes ______．A.require loading operations to be shut down until the atmosphere clearsB.are toxic to human lifeC.are subject to spontaneous combustionD.may be explosive in some concentrations
Combustible gas indicators measure the presence of combustible gas as a percentage of the____.A.flash pointB.upper explosive limitC.lower explosive limitD.fire point
In determining a safe speed, the Rules list all of the following as factors which must be taken into account EXPECT the ______.A.limitations of radar equipmentB.presence of background lights at nightC.maximum horsepower of your vesselD.maneuverability of your vessel
Which of the following is not dangerous cargo?（）A、Coal.B、Explosive cargo.C、Flammable cargo.D、Poisonous cargo.
单选题Bacteria which live are said to be aerobic（）Ain the presence of oxygenBwithout oxygenCin the presence of nutritionDwithout nutrition
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Atmospheres laden with coal dust or grain dust caused by loading these cargoes（）.Arequire loading operations to be shut down until the atmosphere clearsBare toxic to human lifeCare subject to spontaneous combustionDmay be explosive in some concentrations
单选题An aneroid barometer is an instrument（）.Aused to measure the speed of windBin which the pressure of the air is measuredCthat tells which direction a storm is coming fromDused to measure the height of waves
单选题Which instrument is most useful in forecasting fog（）.AA barometerBAn anemometerCA sling psychrometerDA pyrometer
单选题Which instrument is used to predict the approach of a low pressure system（）.AAnemometerBFathometerCBarometerDThermometer
单选题The lowest temperature at which the vapor formed from a liquid ignites and continues to burn steadily in the presence of an ignition source is called the （）Aflash pointBfire pointCupper explosive limitDlower explosive limit
单选题Which instrument is used to measure the relative humidity of air?（）AHydrometerBHygrometerCSpectrometerDBarometer
单选题Combustible gas indicators measure the presence of combustible gas as a percentage of the（）.Aflash pointBupper explosive limitClower explosive limitDfire point
单选题Combustible gas indicators measure the presence of combustible gas a percentage of the（）.Aflash pointBupper explosive limitClower expiosive limitDAll of the above
单选题In determining a safe speed（）shall not be among those taken into account.Athe presence of the background light at nightBthe state of wind，sea and currentCthe number of crew on boardDthe draught in relation to the available depth of water
单选题Cargoes which（）an explosive, inflammable, poisonous and corrosive nature are called dangerous goods.AisBare ofCis ofDare
单选题An inert gas system on a tanker should be used to（）.Aprevent the generation of flammable or combustible gas in tanksBblow out cargo lines to prevent the build up of gas concentrationsCdilute tank atmospheres to keep gas concentrations below the lower explosive limitDprevent fires in the pumproom by continually displacing flammable vapors
单选题An inert gas system on a tanker should be used to（）.Aprevent the generation of flammable or combustible gas in tanksBblow out cargo lines to prevent gas concentrationsCdilute tank atmospheres to keep gas concentrations below the lower explosive limitDprevent fires in the pumproom by continually displacing flammable vapors
单选题The minimum concentration of a vapor in air which can form an explosive mixture is called the（）.Aauto-ignition pointBflash pointClower explosive limit (LEL)Dthreshold limit value (TLV)