What components in a compression refrigeration system maintain the pressure difference in the system?
A) The compressor and condenser B) The compressor and the metering device
C) The condenser and evaporator D) The metering device and evaporator
B
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Direct current motors require only one ____________________ contact to connect or disconnect them to the power line and one overload sensing device.
Fill in the blank(s) with the appropriate word(s).
? Most residences with modern hydronic heating systems use ____________________ baseboard heat transfer for terminal heating units.
Fill in the blank(s) with the appropriate word(s).
A ____ can be described as a solenoid with switching contacts attached to a movable plunger.
a. coil b. relay c. hydraulic circuit d. pneumatic circuit
The footings distribute the ____ of the building, so that there is ____ force per square foot of area.
A. weight; more B. weight; less C. volume; more D. volume; less