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The pressure at the manifold for natural gas is typically:
Describe how a bimetallic flame proving system works.
In a conventional gas furnace, the hot flue gases are:
Describe three types of motor enclosures:
Two gas valve physically in series but wired in parallel are
The ________ wire from the transformer furnishes power to the thermostat.
If the Ohm rating of the load changes what will happen to the ampere flow?
Thermodynamic Properties are the properties of the refrigerant that have to deal with the movement of
Which features does an automatic combination gas valve have?
describe how a modulating furnace works.
What are the two types of magnets used in the HVAC industry?
Describe how a vent damper shutoff functions.
The _____________ thermostat is commonly used for baseboard electric installations.
The factor for converting watts to BTU is ________
What is a fuse?
Low Voltage wire always has to be run in conduit. (True or False)
Two type of wiring diagrams are the pictorial and_________.
A water manometer is used to
Describe the function of the draft diverter.
Three advantages of air-water induction systems
What is magnetism?
What are dual in-line pair (DIP) switches?
The four types of gas furnace air flow patterns are_________, ________, _________ and___________
Low voltage wire has an insulation value for which of the following?
4 advantages of hydronic convector systems
Three common controls used in central electric heat applications are thermostat, contactors,(or relay)
when air is cooled to the point where it's relative humidity is 100 % and the moisture can condense and separate, we say the air has reached it's temp.
Which of the following iteams are considered accessories to a Manifold Gauge Set?
What is torque?