IDA-201 HVAC Motors and System Performance-Mr. Graham

What is the primary function of the motors discussed in residential HVAC systems?

• Generate electricity

• Filter air

• Push air

• Regulate temperature

Which component is essential for starting and efficiently running a PSC motor?

• Resistor

• Inductor

• Capacitor

• Transistor

Which brand and model is commonly associated with constant torque motors?

• Carrier Infinity

• Trane XL

• Genteq X13

• Lennox Merit

Constant torque motors were developed to help manufacturers meet what specific federal mandate in 2006?

• 10 SEER

• 13 SEER

• 15 SEER

• 18 SEER

What does the acronym ECM stand for, referring to both constant torque and variable speed motors?

• Electrical Current Module

• Energy Conversion Mechanism

• Electronically Commutated Motor

• Efficient Cooling Machine

What is a key operational characteristic of variable speed motors in HVAC systems?

• They operate at a single fixed speed

• They can only run at high speed

• They can run from very low to 100% capacity

• They require manual speed adjustment

What does the acronym PSC stand for in the context of HVAC motors?

• Power Supply Control

• Permanent Split Capacitor

• Pressure Sensor Circuit

• Phase Shift Converter

What is the typical efficiency rating of PSC motors?

• 90%

• 80%

• 70%

• 60%

How do PSC motors react to airflow restrictions like dirty filters or undersized ductwork?

• They increase speed

• They maintain constant performance

• They lose performance

• They automatically clean the filters

In terms of cost for replacement or repair, how do PSC motors compare to constant torque and variable speed motors?

• Most expensive

• Moderately expensive

• Least expensive

• Similar to variable speed