LEC Track & Signal Systems 2

Question 1

What does a 'Slow Clear' signal aspect require the engineer to do?

Accepted Answer

Proceed through the turnout at or below the slow speed limit, then resume normal speed

Answer

A Slow Clear signal requires the engineer to reduce speed to the designated slow speed (typically 15 mph) through the turnout, after which normal authorized speed may resume.

Question 2

Under FRA track classification standards, what is the maximum freight train speed on Class 1 track?

Accepted Answer

10 mph

Answer

FRA Class 1 track permits a maximum freight train speed of 10 mph and passenger train speed of 15 mph, representing the lowest classification for main track.

Question 3

What does an Absolute Block system ensure in railroad operations?

Accepted Answer

That only one train occupies a block section at any given time

Answer

An Absolute Block system ensures that only one train is permitted within a designated block section at any time, providing the most fundamental form of train separation.

Question 4

What is 'dark territory' in the context of railroad signal systems?

Accepted Answer

A section of railroad where no wayside signals or PTC exist, requiring train order or track warrant authority

Answer

Dark territory refers to sections of track that have no automatic block signals, cab signals, or PTC, requiring dispatchers to issue track warrants or train orders to authorize train movements.

Question 5

When a 'Medium Approach' signal is displayed, the engineer must:

Accepted Answer

Proceed at medium speed and prepare to stop at the next signal

Answer

A Medium Approach signal requires the engineer to proceed at medium speed (typically not exceeding 30 mph) and be prepared to stop before passing the next signal.

(LEC) Locomotive Engineer Certification Practice Test

(LEC) Locomotive Engineer Certification Practice Test

LEC Track & Signal Systems 2