Question 16Refrigeration/AC - 1st Asst/Chief70% to pass
Sludge may form in the crankcase of an air conditioning compressor as a result of what condition?
AI Explanation
The correct answer is B) overheating and carbonization of the oil in the crankcase.
Sludge formation in the crankcase of an air conditioning compressor is typically caused by the overheating and carbonization of the oil. When the oil in the crankcase is subjected to high temperatures, it can break down and form carbon deposits or sludge. This sludge can accumulate and clog oil passages, leading to reduced lubrication and potential damage to the compressor.
The other options are incorrect because:
A) Reducing the cloud or floc point of the oil would not directly lead to sludge formation.
C) Excessive foaming of the oil can cause issues, but is not the primary cause of sludge buildup.
D) Lowered compressor operating temperatures would not lead to sludge formation.
Related Questions
#14 Which of the valves listed is normally closed when charging the refrigeration system through the high side? #15 Corrosion has wasted away large sections of the fins attached to an air conditioning cooling coil. In assessing the effects on the system you would assume which of the following to be accurate? #17 The rupture disc on a low pressure centrifugal refrigeration unit is used as an over pressure protection device and is set to relieve at 15 psig and is most likely to lift when the compressor is idle? Where is the rupture disc located? #18 Which of the lettered components shown in the illustration indicates the high pressure cutout? Illustration GS-RA-12 #19 In a refrigeration system that is not protected by a water failure switch, if the cooling water to the condenser fails, what will be the result for protective purposes?