During normal operation, what voltage should be read across the blower motor terminals assuming the system is functioning correctly?

When assessing the voltage across the blower motor terminals during normal operation, it's crucial to consider the typical voltage levels used in HVAC systems and the design of the specific blower motor being referenced. In many residential and commercial heating and cooling systems, blower motors are commonly powered at either 120 volts or 240 volts, depending on the application and design specifications.

In this scenario, the correct answer is 120 volts, which is a standard operating voltage for many single-phase blower motors commonly found in HVAC systems. A reading of 120 volts across the blower motor terminals confirms that the motor is receiving the appropriate voltage to function effectively, enabling it to run at its designated capacity and provide the necessary airflow.

The other voltage levels mentioned can be contextually possible in different scenarios, but for most standard residential blower applications, 120 volts is the expected voltage reading when everything is functioning normally.