What is a good way to guard against electrical shock at your station?
The correct answer is D: All these choices are correct. Good ways to guard against electrical shock at your station include: using three-wire cords and plugs, connecting all AC equipment to a common safety ground, and installing mechanical interlocks in high-voltage circuits. All three are important safety measures. Three-wire cords provide grounding, common grounding ensures all equipment is at the same potential, and interlocks prevent access to high voltage when equipment is opened. For amateur radio operators, multiple layers of protection are essential for electrical safety.
Exam Tip
All three protect against shock: three-wire cords, common ground, mechanical interlocks. When all listed measures are valid safety practices, 'all of the above' is usually the answer. Multiple layers of protection are essential.
Memory Aid
"All three protect against shock: Three-wire cords, Common ground, Mechanical interlocks. Think 'A'll 'S'hock 'P'rotection. Multiple layers of safety measures work together."
Real-World Application
Your station uses: (1) Three-wire power cords on all equipment for proper grounding, (2) All equipment connected to a common ground bus to ensure same potential, (3) Mechanical interlocks on your high-voltage power supply that disconnect power when the cover is opened. All three measures work together to protect you from electrical shock.
Key Concepts
Why Other Options Are Wrong
Option A: While correct, this is incomplete. Common grounding and interlocks are also important.
Option B: While correct, this is incomplete. Three-wire cords and interlocks are also important.
Option C: While correct, this is incomplete. Three-wire cords and common grounding are also important.
题目解析
The correct answer is D: All these choices are correct. Good ways to guard against electrical shock at your station include: using three-wire cords and plugs, connecting all AC equipment to a common safety ground, and installing mechanical interlocks in high-voltage circuits. All three are important safety measures. Three-wire cords provide grounding, common grounding ensures all equipment is at the same potential, and interlocks prevent access to high voltage when equipment is opened. For amateur radio operators, multiple layers of protection are essential for electrical safety.
考试技巧
All three protect against shock: three-wire cords, common ground, mechanical interlocks. When all listed measures are valid safety practices, 'all of the above' is usually the answer. Multiple layers of protection are essential.
记忆口诀
All three protect against shock: Three-wire cords, Common ground, Mechanical interlocks. Think 'A'll 'S'hock 'P'rotection. Multiple layers of safety measures work together.
实际应用示例
Your station uses: (1) Three-wire power cords on all equipment for proper grounding, (2) All equipment connected to a common ground bus to ensure same potential, (3) Mechanical interlocks on your high-voltage power supply that disconnect power when the cover is opened. All three measures work together to protect you from electrical shock.
错误选项分析
Option A: While correct, this is incomplete. Common grounding and interlocks are also important. Option B: While correct, this is incomplete. Three-wire cords and interlocks are also important. Option C: While correct, this is incomplete. Three-wire cords and common grounding are also important.
知识点
Electrical shock protection, Grounding, Safety measures, Station safety
Verified Content
Question from official FCC Technician Class question pool. Explanation reviewed by licensed amateur radio operators.