What is the primary purpose of the automatic brake system on a train?
The automatic brake system provides emergency and service braking for the entire train.
When descending a long grade, what technique should be used to prevent overheating the brakes?
Using dynamic braking and intermittent applications prevents brake fade from heat.
What is the role of a locomotive engineer at a highway-rail crossing?
Locomotive engineers must be alert and sound the horn per regulation to warn traffic.
What does 'in-train forces' refer to?
In-train forces are the longitudinal forces caused by acceleration, braking, and terrain that affect car couplers.
Which braking system helps reduce wear on brake shoes?
Dynamic brakes convert kinetic energy into electrical energy, reducing reliance on friction brakes.
What must be done before moving a train?
A brake test ensures the brakes on all cars function correctly before departure.
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What is slack action in train handling?
Slack action refers to the free movement between coupled railcars that can cause jolts during starts or stops.
Which throttle setting is typically used when starting a heavy train?
Throttle notch 1–3 is used to provide a smooth start and minimize in-train forces.
Why must engineers avoid excessive buff and draft forces?
Excessive buff and draft forces can cause derailments or damage to railcars and cargo.