ARRL Technician Practice Exam

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Prepare for the ARRL Technician Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What hazard is presented by a conventional 12-volt storage battery?

It can corrode metal surfaces
Explosive gas can collect if not properly vented
It does not have a significant hazard
It can only be safely charged during the day

The correct answer is: Explosive gas can collect if not properly vented

A conventional 12-volt storage battery, commonly used in various applications including automobiles and amateur radio equipment, presents a significant hazard due to the potential accumulation of explosive gases, particularly hydrogen. When a battery is charged, especially if overcharged, it can release hydrogen gas, which is highly flammable and can lead to explosions if ignited. Proper ventilation is essential to mitigate this risk, ensuring that any gases can dissipate safely into the environment. Corroding metal surfaces, while a concern, is not as urgent as the explosive gas hazard associated with improper battery venting. The claim that there is no significant hazard downplays the serious risks associated with handling and charging batteries, and the notion that batteries can only be safely charged during the day is not accurate; safety measures regarding ventilation and handling apply regardless of the time of day. Therefore, the correct choice highlights the critical need for appropriate battery maintenance and management to avoid the risks posed by explosive gases.