单项选择题
A.excessive drive motor speed B.excessive pump discharge pressure C.too low of a tilting box angle D.insufficient drive motor speed
Refrigerant enters the condenser as a （）.A.high pressur...
单项选择题Refrigerant enters the condenser as a （）.
A.high pressure liquid B.low pressure vapor C.high pressure vapor D.low pressure liquid
An excessive amount of water is prevented from entering...
单项选择题An excessive amount of water is prevented from entering a vessel using a water lubricated stern tube bearing by the use of the （）.
A.propeller hub B.lignum vitae C.shaft packing D.labyrinth seal
Under normal conditions, the refrigerant enters the com...
单项选择题Under normal conditions, the refrigerant enters the compressor in an operating refrigeration system as a （）.
A.liquid B.dry saturated gas C.wet saturated gas D.superheated vapor
