Air conditioning and refrigeration systems are intended to operate with the correct amount of refrigerant to help ensure efficient operation. List six problems that can result if a system operates from a deficiency of refrigerant.
What will be an ideal response?
inadequate cooling
increased system run time
increased energy usage
decreased equipment life
improper compressor cooling
increased humidity in the occupied space
mold issues
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Milk should be stored at what temperature?
a. 32 degrees Fahrenheit c. 42 degrees Fahrenheit b. 38 degrees Fahrenheit d. 48 degrees Fahrenheit
A 6-cylinder engine has a swept volume of 37.24 in^3 in each cylinder. What is the displacement of this engine?
A) 637.24 in^3 B) 223.44 in^3 C) 43.24 in^3 D) None of these
Most piston compressors use what type of valves?
A) Poppet B) Reed C) Sliding D) On-off gate-type valve
To comply with laws set forth by the EPA, the technician should __________ pressurize a system for leak-checking purposes with 100 percent refrigerant.
A. always B. never C. occasionally D. often