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Foaming of the oil in a refrigeration compressor crankcase is caused by _____.

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expansion valve to overfeed  compressor to knock  water regulating valve to fail  crankcase drains to plug  
oxygen in the water  poor boiler design  density too high  excessive steam demand  
compressor damage from improper lubrication  refrigerant absorption by the lubricant  increased viscosity in the lubricant  carbon deposit on the compressor suction valves  
oil foaming will occur  large quantities of oil are consumed  lube oil viscosity is always decreased  corrosive by-products are usually formed  
acidity of the oil  pour point of the oil  flash point of the oil  viscosity of the oil  
to fuel oil instead of diesel oil  for fuel oil instead of diesel oil  to diesel oil into fuel oil  for diesel oil into fuel oil  
mineral oil  machinery oil being transferred for shipboard use  crude oil unrefined  normal bilge oil and water  
filter to remove the fuel oil  use the settler to remove the fuel oil  remove the fuel oil by centrifuging  drain and then renew the lube oil supply  
the ability of oil to separate from water  the temperature at which oil flows rapidly  a measure of the water in a lube oil system  an emulsion of different grades of oil  
has nm continuously for a long period  suction pressure is below normal  oil level is below normal  starts after a long idle period  
cause a loss of the liquid seal  create a vapor lock in the liquid receiver  collect in the condenser  cause foaming of the oil in the crankcase  
acidity has increased  viscosity has decreased  demulsibility has improved  foaming is guaranteed to occur  
overheated compressor bearings  excess lube oil viscosity  carbon deposits on the compressor piston rings  wax crystals forming in the lubricant  
Crude oil  Fuel oil  Vegetable oil  Lubricating oil  
TBN number  viscosity  temperature  foaming  
excessively high oil temperatures  water or moisture contamination  fuel dilution  life its cylinder relief vales  
diesel oil instead of fuel oil  fuel oil instead of diesel oil  diesel oil instead fuel oil  fuel oil instead diesel oil  
absorb the oil for easy removal  remove the oil from the water  disperse or dissolve the oil in the water  not affect the oil  
oil foaming in the compressor  higher than normal suction and discharge pressures with a higher box temperature  higher than normal discharge pressure with a normal box temperature  the compressor to run continuously  
Water discharging from the water outlet of the lube oil purifier  Fuel oil discharging from the water outlet of the lube oil purifier  Lube oil discharging from the water outlet of the lube oil purifier  A change in the lube oil viscosity  

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