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单选题
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
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While working in the server room a technician notices that water is forming on the walls of the serverroom. Which of the following is the BEST course of action to correct the problem？（）A、 Contact facilities staff to adjust the humidity levels.B、 Leave the temperature the same， after time it will evaporate on its own.C、 Lower the temperature， the cold air will help the water evaporate.D、 Contact facilities staff to raise the temperature of the room.
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单选题The vapor pressure of a substance（）.A
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单选题Water evaporates or steam condenses at the saturation temperature, which depends upon the pressure, the higher the pressure （） the saturation temperature.A
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考题
单选题The dew point temperature is（）.A
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考题
单选题The dew point is reached when the（）.A
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考题
单选题The temperature at which water vapor in the atmosphere begins to condense is called the （）.A
dew point temperatureB
condensation temperatureC
psychometric temperatureD
absolute humidity temperature
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单选题The temperature at which the air is saturated with water vapor and below which condensation of water vapor will occur is referred to as the（）.A
precipitation pointB
vapor pointC
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单选题Domestic water pump is started automatically by （） which operates as the water level falls to a predetermined level.A
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a floating ball
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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 （）A
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单选题The heated feedwater entering any flash chamber of a flash-type evaporator will（）A
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vaporize, with the unflashed water equalizing to the saturation conditions existing in the flash chamberC
vaporize, with the remaining water at the temperature greater than it entered the flash chamberD
boil, allowing steam bubbles to rise through the brine at the bottom of the flash chamber
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单选题In the two stage flash distilling plant, which of the pumps listed is vented to the shell of the second stage in order to remove vapor from the pump suction?（）A
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Feed-water heater drain pumpC
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单选题The second stage feed-water temperature and shell absolute pressure in a multistage, flash type, distilling plant is （）A
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lower than the first stage feed-water temperature and absolute shell pressureC
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not related to the feed-water temperature and absolute shell pressure
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单选题Which of the following descriptions best identifies the operating principal of a flash-type evaporator?（）A
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单选题Which of the following methods is normally used to control the temperature of air distributed from individual cooling coils in an air conditioning system using a chilled water circulation system?（）A
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单选题Which of the following statements is correct relative to distillation plant operation?（）A
Distillation is the process of boiling seawater to produce vapor which is condensed into fresh waterB
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单选题The lowest temperature at which a liquid gives off enough vapor to ignite in the presence of an ignition source is called its （）.A
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flash pointC
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toxic point
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