海船船员考试
单选题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
题目
exerted by liquid cargo on the sides of a tank
exerted by liquid cargo on a cargo hose body
the lowest temperature and pressure that will cause a flammable liquid to give off vapors
a measurement of the amount of flammable vapors given off by a liquid at a certain temperature
参考答案和解析
相似问题和答案
第1题：
Which factor must be considered when determining the order of loading of dissimilar products through the same piping system aboard a tanker?
A.Contamination of the cargo
B.Flash points
C.Reid vapor pressures
D.Specific gravities
第2题：
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
第3题：
The expression THE AIR IS SATURATED means ______.
A.the relative humidity is 100%
B.the vapor pressure is at its minimum for the prevailing temperature
C.precipitation has commenced
D.cloud cover is 100%
第4题：
A microbarograph is a precision instrument that provides a ______．
A.charted record of atmospheric temperature over time
B.charted record of atmospheric pressure over time
C.graphic record of combustible gases measured in an atmosphere
D.graphic record of vapor pressure from a flammable/combustible liquid
第5题：
What best describes for how long a gas-free test is good ________．
A.For as long as is indicated on the gas-free certificate
B.For the instant that it is made
C.Until valves in line with the tank or compartment are reopened
D.Until changes in temperature or pressure affect the vapor content in the space
第6题：
The dew point is reached when the ______.
A.temperature of the air equals the temperature of the seawater
B.atmospheric pressure is 14.7 lbs. per square inch
C.relative humidity reaches 50%
D.air becomes saturated with water vapor
第7题：
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
第8题：
How does an inert gas system on a tanker function to prevent explosions in cargo tanks?
A.De-energizes the "charged mist" effect
B.Maintains a positive pressure on the vent header to cool the flammable vapors
C.Inert gas filters out the flammable vapors from the cargo tank spaces
D.Inert gas dilutes the flammable vapor and air concentrations to keep them below the lower explosive limit
第9题：
You are on a tanker designed to carry molten sulfur．Which statement is TRUE ________．
A.There must be two portable toxic vapor detectors on board
B.The cargo tank ventilation system must maintain the H2S vapor concentration at 1.85% or more by volume
C.Cargo temperature may be taken by portable thermometers
D.The pressure in the heating coils in the tanks must be less than that of the cargo exerted on them
第10题：
A heated bulkhead has the effect on a hygroscopic commodity of ______.
A.causing moisture to accumulate against the bulkhead
B.lowering the vapor pressure of the commodity
C.lowering the dew point of the air
D.raising the vapor pressure of the commodity
加热舱壁会使液体货物的蒸汽压力升高。