HVAC 1
On a Fahrenheit scale, water boils at ____ degrees and freezes at ____ degrees.
212 and 32
what voltage goes to the thermostate?
24v
What type of copper is used for refrigeration?
ACR
to remove burrs from tubing ends and ensure smooth connections
purpose of a reamer
Gas pressure is measured in which unit of measure?
inches of water column
The green wire going to the thermostat where are you connecting it on the thermostat base?
G
When installing a thermostat on the wall the subbase must be ?
Level
The type of pipe commonly used for condensation drainage on central air conditioning systems is ?
PVC
Ground wires are usually which color?
green
What type of gas is used to pressurize new ACR piping circuits for leak detection purposes?
nitrogen
For complete combustion , what is required?
Oxygen, ignition , and fuel
In the thermostat , the yellow control wire is commonly connected to the ?
Y1
multi-size tool for precise bends.
lever-type bender
Internal bending spring
used near the end of tubing for small bends
What is the correct definition of matter?
Anything that has weight and mass and occupies space.
The exhaust temperature of a condensing gas furnace is
90 - 135*F
To measure manifold gas pressure, a/an _____ must be used?
Manometer
Reamer
to remove burrs from tubing ends and ensure smooth connections.
Typically, corded drills supply __________ power than the cordless variety.
more
On a call for heat on an electric furnace, __________ volts should be read between W and G on the thermostat terminal strip.
0
When installing a refrigeration system, the first task must be to _____ the system.
leak test
The red wire going to the thermostat where are you connecting it on the thermostat base?
R
A 50 lbs. recovery cylinder should contain no more than ___ lbs. of refrigerant.
40
Which component in a refrigeration system is responsible for reducing the pressure in the system?
metering device
When troubleshooting an air-to-air heat pump, the technician notices that the outdoor fan motor is not operating, but the compressor is operating during a call for heat. What is the most likely problem?
defective defrost fan control