PTS PTS - Personal Track Safety Working Near Electrified Lines 3 — Questions and Answers
Question 1: When working near a 25kV overhead electrified line, what is the minimum safe approach distance for an uninsulated person or tool?
- 3 feet
- 6 feet (Correct answer)
- 10 feet
- 15 feet
Correct answer: 6 feet
The standard safe approach distance for uninsulated workers near 25kV overhead lines is 6 feet (approximately 2 meters).
Question 2: What should a worker do if they discover that the electrified line voltage is higher than they were briefed on before starting work?
- Proceed cautiously at increased distances
- Continue work using existing controls
- Stop work immediately and notify the supervisor (Correct answer)
- Use rubber gloves and continue
Correct answer: Stop work immediately and notify the supervisor
Any discrepancy in line voltage from the briefing requires an immediate work stoppage and supervisor notification before proceeding.
Question 3: Which type of equipment requires a greater exclusion zone when working near electrified lines compared to a hand tool?
- A voltage meter
- A long-handled rake
- A crane or elevated work platform (Correct answer)
- A tamping bar
Correct answer: A crane or elevated work platform
Cranes and elevated work platforms have large reach envelopes and must maintain greater exclusion zones to prevent accidental contact with overhead lines.
Question 4: What is 'induction' in the context of electrified railway lines?
- The process of onboarding new track workers
- An electrical hazard caused by proximity to live conductors even without direct contact (Correct answer)
- The voltage measurement technique used on AC lines
- A method of insulating overhead wires
Correct answer: An electrical hazard caused by proximity to live conductors even without direct contact
Induction is an electromagnetic phenomenon where a nearby live conductor can induce dangerous voltage in adjacent conductors or metallic objects.
Question 5: After a track circuit has been de-energized for maintenance, who is authorized to verify it is safe to touch?
- Any experienced track worker
- The Competent Person or Lookout
- A qualified electrical worker using a voltage tester (Correct answer)
- The locomotive engineer
Correct answer: A qualified electrical worker using a voltage tester
Only a qualified electrical worker with a calibrated voltage tester can confirm a circuit is de-energized and safe to touch.
Question 6: If a metal ladder must be used near electrified equipment, what is the primary precaution?
- Paint the ladder with insulating paint
- Secure the ladder to a permanent structure
- Keep the ladder outside the established exclusion zone at all times (Correct answer)
- Limit ladder use to two workers at a time
Correct answer: Keep the ladder outside the established exclusion zone at all times
Metal ladders are highly conductive, so they must remain outside the exclusion zone established for the electrified equipment.
Question 7: What is the correct action if a live wire falls onto or near a vehicle you are occupying on the right-of-way?
- Exit immediately and run to safety
- Stay inside the vehicle and call for help (Correct answer)
- Drive the vehicle clear of the wire at high speed
- Touch the wire with insulated gloves to move it
Correct answer: Stay inside the vehicle and call for help
Staying inside the vehicle is safest because exiting can complete a circuit through your body as current flows between the wire and ground.
PTS PTS - Personal Track Safety Working Near Electrified Lines 3
When working near a 25kV overhead electrified line, what is the minimum safe approach distance for an uninsulated person or tool?