Basic Furnace Review Flashcards
Once a force is applied to an atom , particles that are released causing glow. What are they called
Electrons
What particles in an atom are positively charged in which ones are negatively charged
Electrons are negative protons are positive
What is used to measure flow of electrons?
Amps
What is used to measure force apply to electrons?
Voltage
When an electric circuit does not have a load and the circuit is closed with power, what is it called?
Short circuit
What is the formula to calculate watts
Voltage times amps
What are different types of electrical diagrams?
Ladder diagram
Connection
Why is the heat anticipator used in thermostat?
Prevent overshot
Why is the anticipator used in thermostat?
Over shot
What’s the fan on range on limit switch
140f
What’s the fan off temp for limit switch
80f
What’s the max temp for high limit
250f
How are transformers rated
VA
Voltage amps
What are heat exchangers used for?
Separate products of combustion from heat
What is draft diverter used for?
Dilution air, cool products of combustion
Wire gauge for 120 VAC to furnace
14 gauge solid core
How air is required for the theoretical combustion of natural gas?
One cubic foot of gas needs 10 ft.³ of air
Can flexible, gas connecter be used for residential furnace?
Yes, Max 2 feet
What is the max gas pressure going into a residential dwelling?
2 psi
