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单选题
Condensate must be drained from the intercooler and after-coolers of an air compressor because （）.
A
the cooling effect of the condensate reduces the compressors efficiency
B
a danger of explosion exists whenever water is present in a compressor
C
water causes erratic operation of pneumatic components
D
the volumetric capacity of the first stage is reduced if water remains
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考题
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考题
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单选题It should be apparent that little or nothing is gained by opening a drain at the same time as or after admitting steamThe above sentence probably means （）.A
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考题
单选题Which of the following problems can occur if you continually fail to drain off condensate from a starting air receiver?（）A
Corrosion and eventual failure of the tankB
Gumming of the tank relief valvesC
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Boiling of the water oil mixture as pressure is reduced
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单选题A vacuum is initially established in the first and second stages of a low pressure evaporator by the use of （）A
vacuum drag from the auxiliary condensate systemB
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考题
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leaky discharge valves on the LP cylinderB
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