Air that mixes with combustion byproducts after combustion at the beginning of the flue pipe is
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What is meant by the warm air blower's off-delay timing?
The typical manifold pressure for propane gas is _________in. WC.
When moisture is present in a refrigeration system, what two problems will normally occur in the system?
The operation of the AC motor is based on what principle?
What is induction?
A____________ distributes gas to the various burners.
An electric furnace is operating on 225 V and is drawing 83 amps. What heat capacity is this furnace putting out?
What are the colors of the high and low side gauges?
When a refrigerant saturated with moisture is _______, the water will be released.
When a draft blower is located at the outlet of the heat exchanger and causes a negative pressure in the heat exchanger, it is called:
The resistance wire often used in an electric heating element is made of:
True or Falls: A package sequencer can start or stop only one stage of strip heat.
A liquid will heat when it vaporizes or boils, and the vapor will heat when it condenses.
A sequencer utilizes a __________ to initiate its operation.
A kw is _______ (1000 watts, 1200 watts. Or 10000 watts)
Wire size determined by which of the following?
What is electricity?
All heating thermostats have heat anticipator. (true or False)
Power consuming devices are wired in _________ (series or parallel).
The circulating fan motor normally runs on (high or low) speed in the heating mode
T/F R-22 and R-12 are not toxic therefore they are never dangerous.
What is electromagnetism?
Describe why you should never use flame to leak check a gas system.
The flow of electrons is called?
Radiant heat is transferred by:
Describe a Potential Relay:
The normal low voltage for control circuits is which of the following?
What is a variable output programmable thermostat?
A power consuming devise is referred to as ?