Refrigeration oils must be miscible with the system refrigerant because:
A) The system depends on the refrigerant to carry the oil throughout the system to lubricate all the refrigeration components.
B) The compressor cannot operate properly without liquid refrigerant in the crankcase.
C) The system depends on the refrigerant to return the oil to the compressor.
D) The system depends on the oil to return the refrigerant to the compressor.
Question 2
Automatic expansion valves are similar in operating concept to:
A) Manual valves. B) Electronic expansion valves.
C) Fixed restrictions. D) Pressure regulators.
Lymphatic vessels (green) pick up excess tissue fluid, purify it in lymph nodes, and return it to th
The endocrine glands of the endocrine system are distributed throughout the body.
Relationship of the conduction system to an ECG strip.
reproductive system in plants
Autonomic innervation of the male reproductive system
Human urinary system.