What is frequency? And what unit of measurement is used to measure it?
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Disadvantages of air/water induction system (4)
Describe the purpose of a starting relay and what are the four different types of starting relays?
The process to remove contaminants( air & Moisture) from the manifold and pressure Hoses is called?
What is a redundant gas valve?
What is horse power?
What are the three major parts of a motor?
A standing pilot in a conventional gas furnace:
The control voltage for the controls on a sequencer are typically:
The component location in the thermostat that shuts off the electric furnace down prematurely so that the space will not be overheated is the.
Describe the difference between a single rod (local sensing) and a dual rod (remote sensing) system as they pertain to flame rectification.
Describe (CSCR) Capacitor-Start Capacitor-Run motor:
What are two types of fuses used in the HVAC industry?
Why is excess air supplied to all gas burning appliance burners?
Major components of a single duct variable air system (7)
What does the metering Device do to the refrigerant?
Where are auxiliary limit switches always found in heating applications?
If the heat anticipator was burned so that it was in two parts, the symptoms would be which of the following?
The heat anticipator setting is determined by
The limit switch is a safety device that:
What is the ideal proportion of a boiler room?
Where are inshot burners used in heating applications?
Your Manifold Gauges are connected to an operating unit and both gauge valves are back seated, what happens to the pressure gauge readings ?
What is a water and digital manometer?
High side markings are in _________ increments?
Describe (CSIR) Capacitor Start Induction Run motor, and what are the two types of relays used in these motors and which one is N/C and the other N/O?
The purpose of the gas regulator at a gas burning appliance is to:
A thermocouple is used in a conventional gas furnace as a:
The natural gas flame should be:
What is a direct vented furnace?
What is a Field winding?
The colder the air temp the _____ moisture it can hold.
what is an ampere?
describe how a two stage furnace works.
When system has several sequencers that would cause too much current draw through the heat anticipator, which of the following could be done to prevent the anticipator from burning up ?
Five advantages of packaged terminal units
Disadvantage of single duct variable air volume systems (1)
Characteristics of packaged terminal and through wall units
T/F Will support combustion under certain conditions.
These 2 systems minimize first costs of heating and cooling systems