Rail Operations & Train Handling Flashcards

What is the significance of a 'joint' or 'jointed' track section for train handling compared to continuous welded rail (CWR)?

Answer: Jointed track has rail ends that may create rough ride conditions and requires slower speed for track geometry defects

Jointed track has gaps between rail sections that can develop defects at the joints; FRA sets different geometry standards and speed restrictions for jointed versus CWR track.

Under Positive Train Control (PTC) requirements, what action must a crew take if the PTC system becomes inoperative en route?

Answer: The crew must notify the dispatcher, obtain authority, and operate under applicable backup procedures

FRA PTC regulations require crews to immediately notify the dispatcher of a PTC failure and operate under approved backup procedures, which include speed restrictions.

What is the correct procedure when a train crew receives conflicting authority — for example, a verbal dispatcher instruction that conflicts with a signal indication?

Answer: Follow the more restrictive of the two authorities

FRA operating rules require train crews to comply with the most restrictive indication or authority when conflicts exist, prioritizing safety over efficiency.

What is 'shoving movement' in rail yard operations, and what is the primary safety concern?

Answer: A movement where the locomotive pushes cars without a crew member at the leading end, with the key concern being unseen obstructions

Shoving movements involve pushing cars with the locomotive at the rear; the primary hazard is that the crew cannot see obstacles, people, or track conditions ahead of the leading car.

FRA regulations require that after a train has been in emergency braking, the crew must verify what condition before recharging the brake pipe?

Answer: That the cause of the emergency is identified and corrected

Before recharging after an emergency application, the crew must determine and correct the cause to ensure it is safe to restore air and resume movement.

Under FRA 49 CFR Part 213, what is the track class that permits the highest freight train speeds, and what is that maximum speed?

Answer: Class 5 — 80 mph for freight

FRA Track Safety Standards classify track in Classes 1–9; Class 5 is the highest class for most freight operations, permitting up to 80 mph for freight trains.

What is the purpose of a 'retainer valve' on a freight car, and when would it be set to the 'high pressure' position?

Answer: It holds a portion of the brake cylinder pressure after a brake release; set high to maintain braking on long descending grades

Retainer valves hold residual brake cylinder pressure after brake release, providing continuous retardation; the high-pressure setting is used to maintain speed control on long, steep downgrades.