What is the purpose of a power supply interlock?
The correct answer is C: To ensure that dangerous voltages are removed if the cabinet is opened. The purpose of a power supply interlock is to ensure that dangerous voltages are removed if the cabinet is opened. Interlocks disconnect power when cabinets are opened, preventing electric shock. For amateur radio operators, this is critical electrical safety. Understanding this helps ensure safe equipment operation.
Exam Tip
Power supply interlock purpose = ensure dangerous voltages removed if cabinet opened. Think 'I'nterlock = 'I'nterrupts power when 'O'pened. Interlocks disconnect power when cabinets are opened, preventing electric shock. Not unauthorized changes, not overheating, not overvoltage - just remove voltage when opened.
Memory Aid
"Power supply interlock purpose = ensure dangerous voltages removed if cabinet opened. Think 'I'nterlock = 'I'nterrupts power. Interlocks disconnect power when cabinets are opened, preventing electric shock. Critical electrical safety feature."
Real-World Application
A power supply interlock: When you open the cabinet, the interlock switch disconnects power, ensuring dangerous voltages are removed. This prevents electric shock if you touch internal components while the cabinet is open. Interlocks are safety devices - they ensure voltage is removed when cabinets are opened. This is the purpose - ensure dangerous voltages are removed if cabinet is opened.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Interlock doesn't prevent unauthorized changes - it's for safety, not warranty protection. Unauthorized changes aren't the purpose.
Option B: Incorrect. Interlock doesn't shut down if too hot - that's thermal protection, not interlock. Overheating isn't the purpose.
Option D: Incorrect. Interlock doesn't shut off if too much voltage - that's overvoltage protection, not interlock. Overvoltage isn't the purpose.
题目解析
The correct answer is C: To ensure that dangerous voltages are removed if the cabinet is opened. The purpose of a power supply interlock is to ensure that dangerous voltages are removed if the cabinet is opened. Interlocks disconnect power when cabinets are opened, preventing electric shock. For amateur radio operators, this is critical electrical safety. Understanding this helps ensure safe equipment operation.
考试技巧
Power supply interlock purpose = ensure dangerous voltages removed if cabinet opened. Think 'I'nterlock = 'I'nterrupts power when 'O'pened. Interlocks disconnect power when cabinets are opened, preventing electric shock. Not unauthorized changes, not overheating, not overvoltage - just remove voltage when opened.
记忆口诀
Power supply interlock purpose = ensure dangerous voltages removed if cabinet opened. Think 'I'nterlock = 'I'nterrupts power. Interlocks disconnect power when cabinets are opened, preventing electric shock. Critical electrical safety feature.
实际应用示例
A power supply interlock: When you open the cabinet, the interlock switch disconnects power, ensuring dangerous voltages are removed. This prevents electric shock if you touch internal components while the cabinet is open. Interlocks are safety devices - they ensure voltage is removed when cabinets are opened. This is the purpose - ensure dangerous voltages are removed if cabinet is opened.
错误选项分析
Option A: Incorrect. Interlock doesn't prevent unauthorized changes - it's for safety, not warranty protection. Unauthorized changes aren't the purpose. Option B: Incorrect. Interlock doesn't shut down if too hot - that's thermal protection, not interlock. Overheating isn't the purpose. Option D: Incorrect. Interlock doesn't shut off if too much voltage - that's overvoltage protection, not interlock. Overvoltage isn't the purpose.
知识点
Power supply interlock, Dangerous voltages, Cabinet opened, Electrical safety
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.