superheated
saturated
condensed
convected
第1题:
In an air conditioning system, moisture is removed from the air by ______.
A.filters
B.separators
C.ducted traps
D.dehumidifiers
第2题:
Due to the large amount of heat picked up by the air in boiler and engine rooms, it would be impracticable to maintain ambient conditions within the comfort zone by air conditioning or any other means. The normal practice is to provide copious mechanical ventilation; in boiler rooms, the quantity is equated to the combustion requirements, while in a motor ship engine room the supply may be 25-50% in excess of the requirements of the engines.
The axial flow fan is particularly suited to handle these large air volumes at the moderate pressures required, while of course the “straight-through” flow feature places it at an advantage over the centrifugal fan.
The increasing adoption of automation, with the provision of a separate control room makes less significant the fact that comfort conditions cannot be maintained in the engine room all the time. Which of the following devices should be taken to maintain ambient conditions of the boiler and machinery space?
A.air compressor
B.air cooler
C.air-conditioning plant
D.mechanical ventilation plant
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:
evaporation
condensation
liquefies
vaporization
第5题:
Would you like the air-conditioning on?的意思是:()?
第6题:
According to this passage, which of the following statements is true?
A.In boiler and machinery spaces, there is the air conditioning.
B.In the boiler rooms the requirement of air volume should meet 25-50% of combustion requirement.
C.To maintain the comfort zone in the separate control room the air conditioning plant should be fitted.
D.The comfort conditions can be maintained in the engine room all the time.
第7题:
第8题:
According to the passage,what is one disadvantage of skyscrapers that have mirrored walls?
A. The exterior surrounding air is heated。
B. The windows must be cleaned daily.
C. Construction time is increased.
D. Extra air-conditioning equipment is needed.
第9题:
possible
necessary
practicable
impracticable
第10题:
bubbling refrigerant
overheating and oxidation
lowered operating temperatures
reducing the cloud or flash point