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- Q615 - Electrical, Electronic, & Control Engineering
123. Which electrical schematic symbol shown in the illustration represents a thermostat which opens on rising temperature
Choice 8 is correct; it depicts a normally closed thermostat that opens when temperature rises. Thermostats are temperature-actuated switches, and the symbol must show a closed contact that opens with increasing temperature. Symbol 8 fulfills this requirement, while other options represent different actuator types or contact positions.
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