海船船员考试
单选题The dew point temperature is（）.A always higher than the air temperatureB always lower than the air temperatureC equal to the difference between the wet and dry bulb temperaturesD the temperature at which the air is saturated with water vapor
题目
always higher than the air temperature
always lower than the air temperature
equal to the difference between the wet and dry bulb temperatures
the temperature at which the air is saturated with water vapor
相似问题和答案
第1题：
Sweat damage will occur in a cargo hold containing machinery parts when ______.
A.the outside air is colder than the cargo．
B.the air temperature of the hold is higher than the outside air temperature．
C.the dew point of the hold is higher than the temperature of the cargo．
D.the dew point of the outside air is lower than the temperature of the cargo
第2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3题：
Which of the processes listed would be the most satisfactory method to use to lower the humidity of the air being circulated by an air conditioning system?
A.Cooling the air to a temperature just above dew point
B.Heating the air to a point at which moisture will boil off ,then re-cooling it
C.Cooling the air to a point below dew point, then reheating it
D.Heating the air and then cooling it to a point below dew point
第4题：
As the temperature for an air mass decreases, the ______.
A.absolute humidity increases
B.relative humidity increases
C.specific humidity increases
D.dew point rises
随着特定气体的温度升高，相对湿度降低。
第5题：
The moisture equilibrium chart can be used to determine the ______．
A.Absolute moisture content of the air surrounding a hygroscopic cargo when moisture equilibrium exists
B.Dew point temperature that the air surrounding a hygroscopic commodity will have when in moisture equilibrium with that commodity
C.Enthalpy of the air surrounding a hydroscopic cargo which is in moisture equilibrium with the cargo
D.Temperature at which moisture equilibrium will occur in a cargo hold containing a hygroscopic cargo
第6题：
When the dew point of the outside air is lower than or equal to the dew point of the air in the cargo hold，you should ______.
A.secure all ventilation
B.shut down the exhaust blowers
C.shut down the intake blowers
D.ventilate the cargo holds
第7题：
Sweat damage in a hatch full of canned goods in cartons will occur when the ______．
A.Air temperature is higher than the temperature of the cargo
B.Air temperature is lower than the temperature of the cargo
C.Dew point is higher than the temperature of the cargo
D.Dew point is lower than the temperature of the cargo
第8题：
Hygroscopic cargoes should be ventilated when ______.
A.going from a warm to a cold climate
B.the dew point of the outside air is greater than the dew point of the air in the hold
C.the dew point of the air in the hold is very low
D.the outside dew point is 16°C and the cargo temperature is 12°C
第9题：
A barometer showing falling pressure indicates the approach of a ______.
A.high pressure system
B.low pressure system
C.high dew point
D.low dew point
气压计显示气压下降，表示低气压临近。
第10题：
As the temperature for a given mass of air increases, the ______.
A.dew point increases
B.dew point decreases
C.relative humidity increases
D.relative humidity decreases
当一特定气团的温度上升时，相对湿度减小。