Practice
Station Safety — Practice
Electrical safety, RF exposure, lightning protection and working at height. Untimed topic practice with a full explanation after every question, so a wrong answer becomes a study note rather than a dead end.
Questions
8
Time limit
Untimed
Pass mark
60%
Before you start
- Untimed. The explanation appears as soon as you answer, because the point here is to learn rather than to score.
- Mark an answer as a guess and it enters your review queue even if it happened to be right.
- Every answer moves your ability estimate for that topic and updates your readiness score.
- Retake as often as you like.
Sample questions
Where should a fuse be fitted in a piece of equipment?
- In series with the supply lead
- In parallel with the supply lead
- In series with the earth conductor
- Across the output terminals
Why In series with the supply lead is right: A fuse must carry the full supply current so it can break the circuit when that current becomes excessive, which means it goes in series with the live supply conductor.
Why can a power supply remain dangerous after it has been switched off and unplugged?
- The transformer keeps generating voltage
- Filter capacitors can hold a lethal charge
- The fuse continues to conduct
- It cannot — removing power always makes it safe
Why Filter capacitors can hold a lethal char… is right: Large filter capacitors store energy and can retain a dangerous charge long after power is removed. Always allow bleeder resistors to act, and verify with a meter before touching anything.
What is the primary purpose of earthing (grounding) station equipment?
- To improve the signal report
- To provide a safe path for fault current and reduce shock hazard
- To increase transmitter power
- To reduce the SWR to 1:1
Why To provide a safe path for fault current… is right: A proper earth gives fault current a low-resistance path so protective devices operate and exposed metalwork does not become live. Any RF benefit is secondary to the safety function.