【单选题】Saltwater is typically provided to a refrigeration system to _____.
A.
cool the expansion valve
B.
prevent refrigerant superheating
C.
condense the refrigerant gas
D.
prevent motor overheating
【单选题】The interior of some diesel engine saltwater heat exchangers are protected from corrosion by the use of_______.
【单选题】据专家们说,从销密的卫星数据中整理出的新的海底图,其详尽程度是过去海底图的30倍。把它们和船上探测获得的大比例尺海洋图加在一起,科学家们便可更加清晰地了解各个不同地点的海洋深度。海底图还可以更加清晰地显示数百万年来地球板块是怎样移动的。
这些海底图是美国国家海洋局和大气管理局的史密斯与美国斯克里普斯海洋研究所的桑德威尔一起绘制的。他们根据卫星测量的、由地球引力变化引起的海面海浪相撞推断出海底特性,...
【单选题】高先生,79岁,肝癌晚期,肝区疼痛剧烈,大量腹水,呼吸困难,感到痛苦、悲哀、有轻生的念头,该患者疾病属于()
【单选题】Where are the zinc plates located? .
A.
saltwater side of the condenser
B.
refrigerant side of the condenser
C.
in the evaporator coils
D.
in the suction strainer
【单选题】Sacrificial zinc anodes are used on the saltwater side of diesel engine heat exchangers to _____.
A.
reduce electrolytic action on heat exchanger metals
B.
keep heat transfer surfaces shiny and clean
C.
prevent rapid accumulation of marine growth
D.
provide a protective coating on heat exchanger surfaces
【单选题】据专家们说,从销密的卫星数据中整理出的新的海底图,其详尽程度是过去海底图的30倍。把它们和船上探测获得的大比例尺海洋图加在一起,科学家们便可更加清晰地了解各个不同地点的海洋深度。海底图还可以更加清晰地显示数百万年来地球板块是怎样移动的。
这些海底图是美国国家海洋局和大气管理局的史密斯与美国斯克里普斯海洋研究所的桑德威尔一起绘制的。他们根据卫星测量的、由地球引力变化引起的海面海浪相撞推断出海底特性,...
【单选题】The steam coils in a high pressure evaporator used for saltwater service should be de-scaled with _____.
【单选题】In a flash type evaporator, all saltwater headers are vented through individual vent cocks to the_____.
A.
saltwater heater shell
B.
second-stage condenser
D.
second-stage flash chamber