LEC Track & Signal Systems

Question 1

What does a red signal aspect (Stop) require a locomotive engineer to do?

Accepted Answer

Stop and not proceed without proper authority

Answer

A red (Stop) signal is an absolute signal requiring the engineer to stop and not proceed without receiving proper authority from the dispatcher or train control.

Question 2

What is the primary function of a Cab Signal System on a locomotive?

Accepted Answer

It displays wayside signal aspects inside the cab for the engineer

Answer

A cab signal system displays current signal aspects inside the locomotive cab, allowing engineers to receive signal information without needing to see wayside signals.

Question 3

Under FRA track standards, what is the maximum authorized speed for freight trains on Class 4 track?

Accepted Answer

60 mph

Answer

FRA Class 4 track permits a maximum freight train speed of 60 mph and passenger train speed of 80 mph.

Question 4

Which hazard is Positive Train Control (PTC) primarily designed to prevent?

Accepted Answer

Train-to-train collisions and overspeed violations

Answer

PTC is mandated by the Rail Safety Improvement Act of 2008 to prevent train-to-train collisions, derailments caused by overspeed, and unauthorized train movements through work zones.

Question 5

What does an 'Approach' signal aspect (yellow over red) communicate to the engineer?

Accepted Answer

Proceed prepared to stop at the next signal

Answer

An Approach signal means the engineer should proceed prepared to stop before any part of the train passes the next signal.

(LEC) Locomotive Engineer Certification Practice Test

(LEC) Locomotive Engineer Certification Practice Test

LEC Track & Signal Systems