What is the purpose of the check valves that are installed in parallel with the metering devices on heat pumps?
A) To prevent excessive pressure difference across the metering device
B) To provide a pressure testing port on both sides of the metering device
C) To direct the flow of refrigerant around the metering device that is not being used
D) To allow the technician to check the operation of the metering device without recovering refrigerant
C
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Answer the following statements true (T) or false (F)
Rows are horizontal, columns are vertical.
Which of the following is the most complete form of economic integration?
A) Customs union B) Free trade area C) Common market D) Economic union
Which sector of the United States was responsible for most of the GNP and the majority of
new jobs created in the mid-1980s?
a. Manufacturing b. Service c. Government d. Exports e. Imports
All of the following can cause total bus failure of the J1850 VPWM bus system, EXCEPT:
A. Open bus wire to the BCM. B. Bus wire shorted to ground. C. Bus wire shorted to battery voltage. D. Internal short in a module.