Texas Fire Alarm License Practice Test

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Study for the Texas Fire Alarm License Test. Review with flashcards and multiple choice questions, each question offers hints and explanations. Prepare thoroughly and boost your confidence for the exam!

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What is one of the characteristics of an over-current device?

It has a permanent power rating
It can adjust to various loads automatically
It disconnects the circuit when current exceeds a specified level
It is only used in residential applications

The correct answer is: It disconnects the circuit when current exceeds a specified level

One of the key characteristics of an over-current device is its function to disconnect the circuit when the current exceeds a specified level. This mechanism is crucial for protecting electrical systems from damage caused by excess current, which can occur due to a short circuit, overload, or other faults. By interrupting the flow of electricity, the device prevents potential hazards such as equipment failure, electrical fires, or other dangerous situations. Over-current protection devices, such as circuit breakers or fuses, are designed to detect these high current levels and respond rapidly to mitigate risk. This characteristic is essential for maintaining safety and reliability in both residential and commercial electrical systems.