Deep Dive: T0A01
The correct answer is B: Shorting the terminals can cause burns, fire, or an explosion. A safety hazard of a 12-volt storage battery is that shorting the terminals can cause burns, fire, or an explosion. Lead-acid batteries can deliver very high current when shorted, generating intense heat, sparks, and potentially causing the battery to explode from hydrogen gas ignition. For amateur radio operators, this is a critical safety concern when working with batteries. Always use proper battery handling procedures and avoid creating short circuits.
Why Other Answers Are Wrong
Option A: Incorrect. Touching both terminals with hands won't cause electrical shock at 12 volts - 12V DC is below the threshold for dangerous shock. However, shorting with a tool can be dangerous. Option C: Incorrect. RF emissions don't cause electrolyte to emit poison gas - this isn't a real hazard. RF doesn't affect battery chemistry this way. Option D: Incorrect. Since A and C are not correct hazards, 'all of the above' cannot be correct. Only shorting terminals is the real safety hazard.
Exam Tip
12V battery hazard = shorting terminals. Think 'S'horting = 'S'erious hazard. Can cause burns, fire, explosion from high current and hydrogen gas. 12V won't shock through skin, RF doesn't create poison gas.
Memory Aid
12V battery hazard = shorting terminals. Think 'S'horting = 'S'erious hazard. High current can cause burns, fire, explosion. Always be careful with tools around batteries.
Real-World Example
You accidentally drop a wrench across a 12V battery's terminals. The short circuit draws hundreds of amps, creating intense heat and sparks. If hydrogen gas has built up in the battery, it can ignite and cause an explosion. This is why you should always be careful with tools around batteries and use insulated tools when possible.
Source & Coverage
Question Pool: 2022-2026 Question Pool
Subelement: T0A
Reference: 2022-2026 Question Pool · T0 - Safety
Key Concepts
Verified Content
Question from the official FCC Technician Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the T0A topic.