REC Signal Systems & Communication 4

Question 1

When operating on dark territory (no signal system), what authority governs train movements?

Accepted Answer

Written or verbal train orders and track warrants

Answer

In dark territory where no signals exist, train movements are controlled exclusively by track warrants, train orders, or direct traffic control issued by the dispatcher.

Question 2

What does 'signal aspect' refer to in railroad signal terminology?

Accepted Answer

The physical appearance of a signal, including color and pattern of lights or position of arms

Answer

Signal aspect refers to the visual appearance of a signal—the combination of colors, lights, and positions that a signal displays.

Question 3

An engineer receives a radio communication from the dispatcher but cannot understand the message due to static. What is the correct action?

Accepted Answer

Request the dispatcher to repeat the message and read it back when understood

Answer

Whenever a radio communication is unclear, the engineer must request a repeat and read back the message to confirm correct understanding before proceeding.

Question 4

What is the function of a 'block' in a railroad signal system?

Accepted Answer

A length of track between two consecutive signals used to space trains safely

Answer

A block is a defined section of track between consecutive signals that allows only one train at a time, providing spacing between trains.

Question 5

What does 'civil speed' mean in railroad operations?

Accepted Answer

The permanent speed restriction based on track geometry and curvature

Answer

Civil speed is the permanent maximum speed restriction based on physical characteristics of the track, such as curves, grades, and track structure.

(REC) Railroad Engineer Certification Practice Test

(REC) Railroad Engineer Certification Practice Test

REC Signal Systems & Communication 4