Foaming of the oil in a refrigeration compressor crankcase is caused by （）.
1、The burning of fuel oil in a diesel en
The burning of fuel oil in a diesel engine having a high sodium content, will cause （）Acorrosion and grooving of exhaust valvesBcorrosion and...
2、Dirt in the fuel oil system of a diese
Dirt in the fuel oil system of a diesel engine can cause （）.Aclogged filtersBpoor combustionCoverloading of the dieselDshock of fuel line
3、The temperature of the refrigerant in
The temperature of the refrigerant in the evaporator coil depends mostly upon the （）.Arefrigerant pressure in the evaporatorBcooling water temperature to the condenserCheat load in the refrigerator compartmentDsolenoid valve in the liquid line
4、A refrigerant with oil in solution has
A refrigerant with oil in solution has a （）.Ahigher boiling temperature for a given pressure than does a pure refrigerantBlower boiling temper...
5、Excessive oil foaming in the crankcase
Excessive oil foaming in the crankcase of a refrigeration compressor can result in （）.Aoverheated compressor bearingsBexcess lube oil viscosityCcarbon deposits on the compressor piston ringsDwax crystals forming in the lubricant
6、In a refrigeration system, foaming of
In a refrigeration system, foaming of the crankcase oil may cause the （）.Aexpansion valve to overfeedBcompressor to knockCwater regulating valve to failDcrankcase drains to plug