Which of the listed statements describes the reason why oil foaming occurs when starting a refrigeration compressor? |
A) This phenomenon is inherent only in hermetically sealed units and is always provisional. |
B) This condition is the result of the sudden low-pressure created in the crankcase at start up causing the release of refrigerant absorbed within the oil. |
C) If the oil level is not initially high, this condition is the result of agitation created by the movement of the mechanical components. |
D) This will occur only if crankcase heaters are used. |