QuestionJuly 23, 2025

Which of the following is a device that does not switch motor contactors and starters on and off but instead are used to directly start motors? Select one: A. Thermostat B. Heavy-duty relay C. Light-duty relay D. Pulley

Which of the following is a device that does not switch motor contactors and starters on and off but instead are used to directly start motors? Select one: A. Thermostat B. Heavy-duty relay C. Light-duty relay D. Pulley
Which of the following is a device that does not switch motor contactors and starters on and off but instead are used to directly start motors? Select one: A. Thermostat B. Heavy-duty relay C. Light-duty relay D. Pulley

Solution
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Answer

D. Pulley Explanation 1. Identify the function of each device A thermostat controls temperature, not directly starting motors. Heavy-duty and light-duty relays switch circuits but do not directly start motors. A pulley is a mechanical device used to change the direction of a force. 2. Determine which device directly starts motors None of the options directly start motors without switching contactors or starters. However, among the given choices, a relay (either heavy-duty or light-duty) can be part of a system that starts motors indirectly by controlling other components.

Explanation

1. Identify the function of each device<br /> A thermostat controls temperature, not directly starting motors. Heavy-duty and light-duty relays switch circuits but do not directly start motors. A pulley is a mechanical device used to change the direction of a force.<br /><br />2. Determine which device directly starts motors<br /> None of the options directly start motors without switching contactors or starters. However, among the given choices, a relay (either heavy-duty or light-duty) can be part of a system that starts motors indirectly by controlling other components.
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