Reid vapor pressure is ______．A.exerted by liquid cargo on the sides of a tankB.exerted by liquid cargo on a cargo hose bodyC.the lowest temperature and pressure that will cause a flammable liquid to give off vaporsD.a measurement of the amount of flammable vapors given off by a liquid at a certain temperature
Reid vapor pressure is ______．
A.exerted by liquid cargo on the sides of a tank
B.exerted by liquid cargo on a cargo hose body
C.the lowest temperature and pressure that will cause a flammable liquid to give off vapors
D.a measurement of the amount of flammable vapors given off by a liquid at a certain temperature
相关考题：
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
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
What is a wet cargo ________．A.A liquid cargo carried in the deep tanksB.A canned or bottled liquid such as beerC.A cargo that contains hygroscopic moistureD.A cargo particularly susceptible to damage by moisture
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
A microbarograph is a precision instrument that provides a ______．A.charted record of atmospheric temperature over timeB.charted record of atmospheric pressure over timeC.graphic record of combustible gases measured in an atmosphereD.graphic record of vapor pressure from a flammable/combustible liquid
A heated bulkhead has the effect on a hygroscopic commodity of ______.A.causing moisture to accumulate against the bulkheadB.lowering the vapor pressure of the commodityC.lowering the dew point of the airD.raising the vapor pressure of the commodity
液体散货用泵装卸的。（）A、Liquid cargo is loaded and discharged by pumps.B、Liquid cargo is loaded and discharged by tubes.C、Liquid bulk cargo is loaded and discharged by tubes.D、Liquid bulk cargo is loaded and discharged by pumps.
Cargo may be divided into two basic types:（）.A、bulk cargo and container cargoB、bulk cargo and general cargoC、bulk cargo and liquid cargoD、dry cargo and liquid cargo
单选题Reid vapor pressure is（）.Aexerted by liquid cargo on the sides of a tankBexerted by liquid cargo on a cargo hose bodyCthe lowest temperature and pressure that will cause a flammable liquid to give off vaporsDa measurement of the amount of flammable vapors given off by a liquid at a certain temperature
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What is the purpose of pressure-vacuum relief valves? （）ARegulation of discharge pressure from cargo pumpsBMaintaining constant velocity in cargo linesCRegulation of suction head on cargo pumpsDTo maintain a tank or void at atmospheric pressure
单选题The designations A，B，C，D and E grades of cargo refer to the（）.Adegrees of quality of petroleum productsBflash point range and Reid vapor pressure index of petroleum productsCgrades of crude oilDpour point，color，and viscosity index of petroleum products
单选题Refrigerant enters the condenser as a （）.Ahigh pressure liquidBlow pressure vaporChigh pressure vaporDlow pressure liquid
单选题Vapor given off by a flammable liquid will burn when ignited provided（）Athe vapor and air mixture is too richBit is mixed with certain proportions of airCthe vapor is too little compared to the airDit is of heavy toxicity
单选题A heated bulkhead has the effect on a hygroscopic commodity of（）.Acausing moisture to accumulate against the bulkheadBlowering the vapor pressure of the commodityClowering the dew point of the airDraising the vapor pressure of the commodity
问答题The difference between a liquid and a gas is obvious (1)____ the conditions of temperature and pressure commonly found at the surface of the Earth. A liquid can be kept in an open container and fills it to the level of a free surface. A gas forms no free surface but tends to diffuse throughout the space available; it must (2)____ be kept in a closed container, as in the (3)____ of a planet’s atmosphere. The distinction was a prominent feature of early theories (4)____(describe) the phases of matter. In the nineteenth century, for example, one theory maintained that a liquid could be “dissolved” in a vapor without losing its identity, and another theory held that the two phases are made up of different kinds of molecules (分子). The theories now prevailing (5) t____ a quite different approach by emphasizing what liquids and gases have in common. They are both forms of matter (6)____ have no permanent structure, and they both flow easily. They are fluids.The (7)____(fundament) similarity of liquids and gases becomes clearly apparent when the temperature and pressure are raised somewhat. Suppose a closed container partially filled with a liquid is heated. The liquid expands, or in other (8)____, becomes less dense; some of it evaporates. In contrast, the vapor above the liquid surface becomes dense as the evaporated molecules are added to it. The combination of temperature and pressure (9)____ which the densities become equal is called the critical point. Above the critical point the liquid and the gas can no longer be (10)____(distinguish); there is a single, undifferentiated fluid phase of uniform density.
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A microbarograph is a precision instrument that provides a（）.Acharted record of atmospheric temperature over timeBcharted record of atmospheric pressure over timeCgraphic record of combustible gases measured in an atmosphereDgraphic record of vapor pressure from a flammable/combustible liquid
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 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A liquid indicator sight glass is useful in determining whether or not a refrigeration system is sufficiently chargedIt is generally located in the（）.Ahigh pressure liquid lineBlow pressure liquid lineChigh pressure vapor lineDlow pressure vapor line
单选题What is the substance called which can readily be converted from a liquid into a vapor, and also from a vapor into liquid with a reasonably narrow range of pressure?（）ARefrigeratorBRefrigerantCCooling mediumDBrine
单选题Access to a cargo pumproom on a tanker 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