NATE Air Conditioning and Heat Pumps Practice Exam

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Ace your NATE Air Conditioning and Heat Pumps Exam with our quiz. Prepare with detailed questions, hints, and thorough explanations to boost your confidence and guide your study journey. Get ready for success in your HVAC certification!

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Practice this question and more.

Some types of loads may be connected in series. Which of the following are loads that must not be connected in series?

Capacitors
High-pressure switches
Motors
Resistive heaters

The correct answer is: Motors

Motors must not be connected in series because they are designed to operate at a specific voltage and are dependent on that voltage to generate the requisite torque and perform their intended function. Connecting motors in series would result in the voltage being divided between them, which could lead to insufficient voltage for any of the motors to start or run effectively. This could cause overheating, reduced efficiency, or even failure of the motors involved. In contrast, capacitors can be connected in series to increase the total capacitance across a circuit. High-pressure switches are typically used for safety in refrigeration systems and might not be designed for series connection due to their operational characteristics. Resistive heaters can be connected in series, as they often operate based on total resistance and can share the supplied voltage across multiple units effectively.