What is meant by “100% tie-off” regarding tower safety?
The correct answer is B: At least one lanyard attached to the tower at all times. '100% tie-off' regarding tower safety means at least one lanyard attached to the tower at all times. This ensures you're always secured to the tower and can't fall.
100% tie-off is a critical tower safety requirement. It means you must always have at least one safety lanyard connected to the tower. When you need to move a lanyard to a higher point, you attach the second lanyard first, then remove the first. This way, you're never without a connection to the tower. This prevents falls if you slip or lose your grip. 100% tie-off is a fundamental safety rule for tower work - you must always be secured. This is why climbers use two lanyards - one stays attached while the other is moved.
Exam Tip
100% tie-off = Always one lanyard attached. Remember: 100% tie-off means at least one lanyard must be attached to the tower at all times - you're never without a connection, preventing falls.
Memory Aid
"**1**00% **T**ie-**O**ff = **A**lways **1** **L**anyard (think '100%TO = A1L')"
Real-World Application
You're climbing a tower. You have two lanyards. As you climb, you always keep at least one attached to the tower. When you need to move up, you attach the upper lanyard first, then remove the lower one. You're never without a connection - this is 100% tie-off. If you slip, the lanyard catches you. This is essential tower safety.
FCC Part 97.13Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Securing loose ropes and guys is good practice, but it's not what '100% tie-off' means. 100% tie-off is about the climber's personal safety lanyards.
Option C: Incorrect. Securing tools to the harness is good practice, but it's not 100% tie-off. 100% tie-off is about the climber being secured to the tower.
Option D: Incorrect. Tying circuit breakers closed is not a safety practice and not related to 100% tie-off. 100% tie-off is about personal fall protection.
题目解析
The correct answer is B: At least one lanyard attached to the tower at all times. '100% tie-off' regarding tower safety means at least one lanyard attached to the tower at all times. This ensures you're always secured to the tower and can't fall. 100% tie-off is a critical tower safety requirement. It means you must always have at least one safety lanyard connected to the tower. When you need to move a lanyard to a higher point, you attach the second lanyard first, then remove the first. This way, you're never without a connection to the tower. This prevents falls if you slip or lose your grip. 100% tie-off is a fundamental safety rule for tower work - you must always be secured. This is why climbers use two lanyards - one stays attached while the other is moved.
考试技巧
100% tie-off = Always one lanyard attached. Remember: 100% tie-off means at least one lanyard must be attached to the tower at all times - you're never without a connection, preventing falls.
记忆口诀
**1**00% **T**ie-**O**ff = **A**lways **1** **L**anyard (think '100%TO = A1L')
实际应用示例
You're climbing a tower. You have two lanyards. As you climb, you always keep at least one attached to the tower. When you need to move up, you attach the upper lanyard first, then remove the lower one. You're never without a connection - this is 100% tie-off. If you slip, the lanyard catches you. This is essential tower safety.
错误选项分析
Option A: Incorrect. Securing loose ropes and guys is good practice, but it's not what '100% tie-off' means. 100% tie-off is about the climber's personal safety lanyards. Option C: Incorrect. Securing tools to the harness is good practice, but it's not 100% tie-off. 100% tie-off is about the climber being secured to the tower. Option D: Incorrect. Tying circuit breakers closed is not a safety practice and not related to 100% tie-off. 100% tie-off is about personal fall protection.
知识点
100% tie-off, Tower safety, Lanyard, Fall protection
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.