单项选择题
A.overcooling B.poor cooling C.overloading D.unloading
Bad valves operation of the reciprocating air compresso...
单项选择题Bad valves operation of the reciprocating air compressors can be detected by observation of （）.
A.the discharge temperature low B.the discharge temperature high C.the discharge pressure rise D.the inter-stage pressure low
By far the greatest item of maintenance of the reciproc...
单项选择题By far the greatest item of maintenance of the reciprocating air compressors concerns （）.
A.the lubrication B.the cooling C.the moisture separation D.the valves
A compressor should never be stopped （）.A.without first...
单项选择题A compressor should never be stopped （）.
A.without first cooling it B.without first heating it C.without first unloading it D.without first loading it
