单项选择题
A.the solid waste dump chute B.an access door C.the same way for waste oil burners D.a changing opening
If plastic film insulation becomes damaged in air condi...
单项选择题If plastic film insulation becomes damaged in air conditioning system, （） may form within the film.
A.evaporation B.condensation C.liquefies D.vaporization
Under tropical conditions, control valves have fully op...
单项选择题Under tropical conditions, control valves have fully opened, but the room still hot.What measures can be taken in such a case?（）
A.Keep the plant running all time B.Start another blower C.Increase the ratio of circulated to fresh air D.Reduce the seawater flow to the condenser
Under normal conditions, the quantity of air circulatio...
单项选择题Under normal conditions, the quantity of air circulation becomes less and less.What is the reason?（）
A.dirty delivery ducts B.too much refrigerant C.the fouling filters D.high temperature outside
