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WorksheetsHVAC Components & Review
Total questions: 22
Worksheet time: 11mins
What is the function of a thermostat in an HVAC system?
Distributes the signal (R) from the 24v transformer to the proper destination
Controls the speed of the blower motor
Controls the pressure in the high pressure line
Controls the speed of the condenser fan motor
What is the purpose of a hot surface igniter in a gas furnace?
To measure the pressure in the low pressure line
Glows Orange to light the flame
To control the speed of the blower motor
To control the sequence of the furnace
What does a thermal roll-out sensor do in an HVAC system?
Controls the speed of the blower motor
Controls the speed of the condenser fan motor
Measures the pressure in the high pressure line
Opens if flames are detected outside of the exchanger
What is the function of a 24 Volt Transformer in an HVAC system?
Converts primary voltage of 120 or 240 to 24 volts
Controls the speed of the blower motor
Controls the signal to the 24v transformer
Controls the pressure in the high pressure line
What is the purpose of an auxiliary heater in a heat pump?
Used to supplement heat in cold temperatures
Controls the speed of the blower motor
Controls the speed of the condenser fan motor
Measures the pressure in the low pressure line
What does a breaker do in an HVAC system?
Controls the speed of the condenser fan motor
Measures the pressure in the high pressure line
Controls the speed of the blower motor
Disconnects the unit when too many amps pass through thus protecting wires and the system
What is the function of an overflow switch in an HVAC system?
Controls the speed of the blower motor
Protects the unit from condensation overflow
Controls the speed of the condenser fan motor
Measures the pressure in the low pressure line
What does a defrost board do in an HVAC system?
Measures the pressure in the high pressure line
Controls the speed of the condenser fan motor
Controls the speed of the blower motor
Sends signals to switch reversing valve for defrosting
What is the purpose of a hard start capacitor in an HVAC system?
Controls the speed of the condenser fan motor
Measures the pressure in the low pressure line
Used to assist normal capacitor in the startup of compressor
Controls the speed of the blower motor
What does an inducer fan motor do in an HVAC system?
Ensures proper draft for flames in exchanger
Controls the speed of the condenser fan motor
Controls the speed of the blower motor
Measures the pressure in the high pressure line
What does a compressor do in an HVAC system?
Controls the speed of the condenser fan motor
Measures the pressure in the high pressure line
Increases the pressure of the refrigerant
Controls the speed of the blower motor
What is the function of an evaporator coil in an HVAC system?
Absorbs heat from the air
Controls the speed of the blower motor
Controls the speed of the condenser fan motor
Measures the pressure in the low pressure line
What does a filter drier do in an HVAC system?
Removes moisture and contaminants from refrigerant
Controls the speed of the condenser fan motor
Measures the pressure in the high pressure line
Controls the speed of the blower motor
What is the purpose of a reversing valve in a heat pump?
Controls the speed of the condenser fan motor
Changes the direction of refrigerant flow, allowing for both heating and cooling
Controls the speed of the blower motor
Measures the pressure in the low pressure line
What is the function of a condenser coil in an HVAC system?
Releases absorbed heat to the outside environment
Controls the speed of the blower motor
Controls the speed of the condenser fan motor
Measures the pressure in the high pressure line
What is the purpose of a blower motor in an HVAC system?
Controls the speed of the condenser fan motor
Pushes air through the ductwork and into the conditioned space
Measures the pressure in the low pressure line
Controls the speed of the blower motor
What does a pressure switch do in an HVAC system?
Controls the speed of the condenser fan motor
Measures the pressure in the high pressure line
Ensures that the system is operating within a safe pressure range
Controls the speed of the blower motor
What is the function of a condensate pump in an HVAC system?
Controls the speed of the condenser fan motor
Removes condensation produced by the HVAC system
Measures the pressure in the high pressure line
Controls the speed of the blower motor
What does a contactor do in an HVAC system?
Controls the speed of the condenser fan motor
Controls the speed of the blower motor
Controls the electrical flow to various parts of the system
Measures the pressure in the high pressure line
What is the purpose of a flame sensor in a gas furnace?
Controls the speed of the condenser fan motor
Measures the pressure in the low pressure line
Detects the presence of flame to ensure safe operation
Controls the speed of the blower motor
What is the purpose of a refrigerant in an HVAC system?
Absorbs and releases heat to cool or heat the building
Controls the speed of the blower motor
Controls the speed of the condenser fan motor
Measures the pressure in the low pressure line
What does a fan limit switch do in an HVAC system?
Controls the speed of the condenser fan motor
Controls the speed of the blower motor
Turns the fan on and off based on the temperature in the plenum
Measures the pressure in the high pressure line
