PTS Safe Systems of Work 5 — Questions and Answers
Question 1: What is the significance of a 'yellow flag' or 'caution flag' displayed in a work zone?
- It signals that the line is fully possessed and no trains will enter
- It warns approaching train crews to reduce speed and be prepared to stop short of workers or equipment (Correct answer)
- It indicates the start of a lookout's assigned watch position
- It marks the handover point between two SSoW authorities
Correct answer: It warns approaching train crews to reduce speed and be prepared to stop short of workers or equipment
Yellow flags warn train operators to reduce speed and be prepared to stop, providing an additional layer of protection for workers in the vicinity.
Question 2: A PIC discovers that the track limits stated in their authority document do not match the actual location of the work. What is the correct response?
- Adjust work to fit within the stated limits as written
- Contact the controlling authority immediately to clarify or correct the limits before any work begins (Correct answer)
- Start work and note the discrepancy on the post-work report
- Assume the wider of the two interpretations applies
Correct answer: Contact the controlling authority immediately to clarify or correct the limits before any work begins
Any discrepancy in authority limits is a serious safety issue and must be resolved with the controlling authority before work commences.
Question 3: In a multi-line environment, a SSoW protects Line 1. A worker needs to briefly step onto Line 2 to retrieve a tool. What must happen first?
- The worker may cross quickly if no train is visible
- Appropriate protection must be confirmed for Line 2 before anyone steps onto it (Correct answer)
- The PIC must verbally authorize the crossing
- The worker must radio the dispatcher and receive verbal clearance
Correct answer: Appropriate protection must be confirmed for Line 2 before anyone steps onto it
No line should be stepped onto without appropriate protection in place; the SSoW for Line 1 does not cover Line 2.
Question 4: What is the primary purpose of a written 'Briefing Record' signed by all workers at the start of a job?
- To fulfill union contract requirements for shift documentation
- To provide evidence that all workers received safety information and understood the SSoW conditions (Correct answer)
- To record hours worked for payroll purposes
- To serve as the authority document for the SSoW
Correct answer: To provide evidence that all workers received safety information and understood the SSoW conditions
A signed briefing record demonstrates that every worker was informed of the safety conditions, responsibilities, and emergency procedures before work began.
Question 5: Which condition would make a lookout-protected working arrangement UNSAFE to use, regardless of other precautions?
- The work is scheduled during daytime hours
- Train speeds are too high for workers to reach safety after receiving a lookout warning (Correct answer)
- The gang consists of more than ten workers
- The work requires the use of power tools
Correct answer: Train speeds are too high for workers to reach safety after receiving a lookout warning
If train speeds are so high that there is insufficient time for workers to reach safety after a warning, lookout protection cannot be safely applied.
Question 6: After an emergency stop is triggered under an SSoW, who must authorize the resumption of work?
- Workers may resume once the danger has clearly passed
- The most senior worker on site
- The PIC, after confirming safety is re-established and the controlling authority has been notified (Correct answer)
- Any certified PTS worker may give the all-clear
Correct answer: The PIC, after confirming safety is re-established and the controlling authority has been notified
Only the PIC can authorize resumption of work, and only after confirming the hazard is gone and informing the controlling authority of the incident.
Question 7: What does 'track and time' working mean in a Safe System of Work context?
- Scheduling work only during off-peak hours when fewer trains operate
- A formal arrangement where specific track sections are allocated to workers for defined time windows with no train movements permitted (Correct answer)
- An informal agreement between the PIC and train crew to share the track alternately
- A system where workers must complete tasks within pre-set time targets
Correct answer: A formal arrangement where specific track sections are allocated to workers for defined time windows with no train movements permitted
Track and time is a formal protection method where defined sections of track are exclusively allocated to workers during agreed time windows, preventing all train movements.
PTS Safe Systems of Work 5
What is the significance of a 'yellow flag' or 'caution flag' displayed in a work zone?