All refrigeration compressors are designed to pump:
A) Only vapor. B) Only liquid.
C) Mostly vapor plus small quantities of liquid. D) Mostly liquid with small quantities of vapor.
[Ques. 2] In a flooded chiller:
A) The water is in the shell and the refrigerant is in the tubes.
B) The water and refrigerant are in separate tubes with a heat transfer medium in the shell.
C) The water and refrigerant are mixed in the shell.
D) The water is in the tubes and the refrigerant is in the shell.
[Ques. 3] How does a reciprocating compressor operate?
A) In a reciprocating compressor, the piston is driven up and down in the cylinder by the connecting rod and crankshaft.
B) In a reciprocating compressor, the piston is moved side to side in a cylinder by the connecting rod and crankshaft.
C) In a reciprocating compressor, the piston is moved in every direction around the cylinder by the connecting rod and crankshaft.
D) In a reciprocating compressor, the piston remains stationary in the cylinder between the connecting rod and crankshaft.
[Ques. 4] In a direct-expansion chiller:
A) The water and refrigerant are mixed in the shell.
B) The water and refrigerant are in separate tubes with a heat transfer medium in the shell.
C) The water is in the tubes and the refrigerant is in the shell.
D) The water is in the shell and the refrigerant is in the tubes.
[Ques. 5] To prevent liquid slugs from leaving the evaporator and entering the compressor, direct expansion evaporators:
A) Are typically fed in the middle with suction gas leaving at the top and bottom.
B) Are typically fed at the bottom with suction gas leaving at the top.
C) Are typically fed at the top with suction gas leaving at the bottom.
D) Are typically fed at the top and bottom with suction gas leaving in the middle.
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