Refrigeration
What's the purpose of a vacuum pump?
Removes moisture
What component circulates air through a home?
Blower
What does DMM stand for?
Digital Multi Meter
What does the metering device do?
Changes refrigerant pressure from high to low.
What does AC and DC stand for in current?
Alternating Current/Direct Current
What does the reversing valve do?
Swaps the flow of refrigerant
Purpose of a fuse?
Protects components from power surges.
What does NEMA stand for?
National Electrical Manufacturers Association
What state is the refrigeration in when it goes into the evaporator?
Liquid
What does BTU stand for?
British Thermal Units
What does TXV stand for?
Thermostatic Expansion Valve
What color should your flame be on a gas furnace?
Steady blue
What deals with more amperage, contactors or relays?
Contactors
What line goes into the compressor?
The suction line
How do you find maximum allowable cylinder capacity?
TW + WC (.80)
What Molecule In refrigerant Is harmful to the Ozone?
Chlorine
Whats a manometer read?
Gas pressure
True or False: Transformers produce voltage in a secondary circuit using magnetism?
True
What does C S R mean?
Common, Start, Run
What's the job of a solenoid in refrigeration?
Controls the flow of refrigerant to the evaporator
What does ODP mean?
Ozone depletion potential
What element was in old thermostats?
Mercury
Whats Ohm's Law?
Ohms Law defines the relationship between voltage, current, and resistance in an electrical circuit
What are capacitors rated in?
Microfarads
What temperature range does brass melt for brazing?
1110°F - 1500°F