An advantage of open drive compressors is that:
A) They are generally less expensive that comparable semi-hermetic compressors.
B) The motor and compressor can be replaced separately.
C) They require no type of regular maintenance.
D) They are smaller and more compact than hermetic compressors.
B
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Which of the following companion birds have the shortest average life span?
A. Cockatiels and Amazon parrots B. Eclectus parrots and macaws C. Quaker (Monk) parakeets and macaws D. Canaries and Lovebirds E. Cockatiels and parrotlets
What makes a material a good electrical conductor?
A) Having 8 electrons in the outer shell B) Having a large number of free protons C) A large number of free electrons D) Having very few electrons
Clay soils consist predominantly of macropores
Indicate whether the statement is true or false
When leak testing a low-pressure chiller, the pressure should not be allowed to exceed 10 psig to avoid:
A) High compressor current draw. B) Opening the high-pressure cutout and shutting the system down. C) Freezing the chiller bundle. D) Breaking the rupture disk and losing the refrigerant charge.