On what does universal EPA certification allows a service technician to work?
What will be an ideal response?
all types of systems with all types of refrigerants except mobile air conditioning
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Which statement is true about refrigerant cooling coils?
A) Control is achieved by a valve on the discharge of the coil. B) Refrigerant changes from liquid to gas in the coil. C) Face velocity can be high since refrigerant coils operate dry. D) Refrigerant changes from gas to liquid in the coil.
Some solenoid systems us a component called a subcooler. What is the purpose of this component?
A. To add more heat to the refrigerant. B. To increase operating efficiency by reducing flash gas at the TXV. C. To superheat the refrigerant. D. To reduce the temperature of the engine coolant.
The jump command is an __________ instruction.
A. input B. output
The input signal must be converted to a(n) ____ logic voltage for use in the processor.
a. high voltage DC b. low-level AC c. analog d. low-level DC