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The vapor pressure of a gas is the pressure necessary to keep it in a（n）______．
A.Soluble state
B.Solid state
C.Liquefied state
D.Inert state
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更多 “ The vapor pressure of a gas is the pressure necessary to keep it in a（n）______．A.Soluble stateB.Solid stateC.Liquefied stateD.Inert state ” 相关考题
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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
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What best describes for how long a gas-free test is good ________．A.For as long as is indicated on the gas-free certificateB.For the instant that it is madeC.Until valves in line with the tank or compartment are reopenedD.Until changes in temperature or pressure affect the vapor content in the space
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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
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单选题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
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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 vapor pressure of a substance（）.A
decreases as temperature increasesB
increases with the temperatureC
is not affected by temperatureD
may increase or decrease as the temperature rises
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单选题The vapor pressure of a gas is the pressure necessary to keep it in a(n)（）.A
soluble stateB
solid stateC
liquefied stateD
inert state
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单选题If a large difference exists between the compressor discharge pressure and the pressure corresponding to the existing condensing temperature in a refrigeration system, you should（）.A
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open the hot gas bypass temporarily to reduce capacityD
purge non-condensable gases to reduce the excess pressure
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higher coolingC
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单选题A heated bulkhead has the effect on a hygroscopic commodity of（）.A
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changing the direction of exhaust gas flowB
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单选题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
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单选题During the fuel injection period, fuel pressure must exceed cylinder gas pressure to （）.A
ensure penetration and distribution of the fuel in the combustion chamberB
ensure the needle valve is flushed clean during each injectionC
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low pressure liquid lineC
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engineC
turbineD
boiler
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单选题The direction of the surface wind is（）.A
directly from high pressure toward low pressureB
directly from low pressure toward high pressureC
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from low pressure toward high pressure deflected by the earth's rotation
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单选题The expansion valve on a Freon system controls the （）.A
superheat of the gas leaving the compressorB
back pressure in the evaporatorC
temperature of the iceboxD
superheat of the gas leaving the evaporator
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单选题You are discharging cargo and the inert gas system is in operation to inert the tanks. The pressure in a tank being discharged starts to drop below the allowable limit. What action should you take? （）A
Cut in another IG fan to increase gas flowB
Open the pressure control valve until the pressure increasesC
Open the tank isolation valve to the fully open positionD
Reduce the pumping rate
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单选题The refrigerant leaves the evaporator of a refrigeration system as a low pressure （）.A
sub-cooled liquidB
high temperature liquidC
oil saturated liquidD
superheated vapor
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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?（）A
RefrigeratorB
RefrigerantC
Cooling mediumD
Brine
考题
单选题Which method is used to supply inert gas from a flue gas system to the cargo tanks?（）A
Exhaust gas pressure from the stackB
High capacity fanC
Inert gas compressorD
Natural aspiration
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