Furnace
Refrigerant Cycle
Low Voltage Wiring
General #1
General #2
100

This part of a gas line helps to catch debris and moisture.

What is a drip leg.


100

These are the four components of the refrigeration cycle

What are the compressor, condenser coil, metering device and evaporator coil


100

R in the low voltage wiring represents this

What is 24v L1 Power


100

This prevents oxidation while brazing.

What is flowing Nitrogen.

100

This represents the equation to calculate subcooling.

What is SCT - LLT.

200

This will represent the units of measurement for gas pressure.

What is InWC

200

This component moves the refrigerant through the system.

What is the compressor

200

G in the low voltage control string represents this

What is L1 control string for the Indoor Fan

200

SLT - SST is the equation used to calculate this 

What is Suction Superheat

200

The total percentage that you can add to a recovery tank's capacity.

What is 80%

300

This type of gas is used in a furnace from the factory.

What is natural gas

300

This scientific law that states heat migrates to cold.

What is 2nd law Of Thermodynamics

300


Y in the low voltage wiring represents this


What is the L1 control string for the outdoor unit.

300

This is the correct way to wire a drain line safety switch.

What is in series with 24v L1 power.

300

This is the proper charging method when a system utilizes a TXV.

What is subcooling.

400

The nominal outlet pressure on a gas valve utilizing natural gas.

What is 3.5 InWC

400

This component contains low pressure and low temperature vapor.

What is the evaporator.

400

The 24v wire L2 on a conventional split system runs from the furnace to what two components?

What are the thermostat and condenser.

400

How much airflow is needed to properly supply a 3 ton system?

What is 1200 CFM

400

When checking airflow, the Anemometer will display what unit of measurement?

What is Feet Per Minute (FPM).

500

This is the material used to flue a 90% furnace.

What is PVC

500

This component creates a pressure drop in the system.

What is a metering device

500

O/B in the low voltage wiring represents this 

What is the reversing valve.

500

FPM x .75 x SqIn (return grille) / 144 represents what method for determining CFM?

What is the Traverse Method.

500

This is an acceptable micron level when pulling a system evacuation after 7 minutes of decay time.

What is 500-1000

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