更多"Reid vapor pressure is（）."的相关试题:
[单项选择]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
[单项选择]The evaporating pressure in R22 vapor compression refrigeration plant should be （） atmospheric.
A. below
B. above
C. equal to
D. much larger than
[单项选择]The vapor pressure of a substance（）.
A. decreases as temperature increases
B. increases with the temperature
C. is not affected by temperature
D. may increase or decrease as the temperature rises
[单项选择]Every liquid has a pressure at which it will vaporize and this pressure varies with temperatureThe word “which” means （）.
A. a liquid
B. a pressure
C. a temperature
D. none of the above
[单项选择]The fuel oil pressure and forced draught pressure should be matched to ensure good combustion with a full steady flameIn the sentence the word “match” means （）
A. join with
B. mix
C. be equal to
D. be constant
[单项选择]High pressure and low pressure alarms must be tested（）.
A. no earlier than 24 hours prior to loading
B. no later than 24 hours prior to loading
C. anytime prior to loading
D. weekly
[单项选择]In a vapor compression refrigeration the evaporating pressure is maintained constant by the action of the （）, which removes vapor from the evaporator at the same rate at which it is formed.
A. evaporator
B. compressor
C. condenser
D. none of the above
[单项选择]Relative humidity is the percentage of water vapor that is in the air as compared to the maximum amount it can hold at（）.
A. a specific barometric pressure
B. a specific temperature
C. a specific wind speed
D. any time
[单项选择]Gasoline vapor tends to collect（）.
A. above the floor plates of the bilges
B. above the carburetor level
C. at the lowest point of the bilge areas
D. at no particular level
[单项选择]Fueling activities（）waste liquids and vapor releases to air.
A. commence
B. generate
C. give
D. have
[单项选择]The minimum concentration of a vapor in air which can form an explosive mixture is called the（）.
A. auto-ignition point
B. flash point
C. lower explosive limit (LEL)
D. threshold limit value (TLV)
[单项选择]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 point
B. fire point
C. upper explosive limit
D. lower explosive limit
[单项选择]The effect of high vapor superheat in a refrigeration system, is a/an （）.
A. increased capacity of the compressor
B. more efficient operation of the thermal expansion valve
C. decreased capacity of the compressor
D. loss of receiver capacity
[单项选择]The temperature at which water vapor in the atmosphere begins to condense is called the （）.
A. dew point temperature
B. condensation temperature
C. psychometric temperature
D. absolute humidity temperature
[单项选择]Before entering a tank, always check the vapor content（）a combustible gas indicator.
A. with
B. by
C. of
D. for
[单项选择]Vapor given off by a flammable liquid will burn when ignited provided（）
A. the vapor and air mixture is too rich
B. it is mixed with certain proportions of air
C. the vapor is too little compared to the air
D. it is of heavy toxicity
[单项选择]Damage to cargo caused by fumes or vapor from liquids,gases, or solids is known as（）.
A. contamination
B. oxidation
C. tainting
D. vaporization
[单项选择]Before entering a tank，always check the vapor content（）a combustible gas indicator.
A. with
B. by
C. of
D. for
