WMATA Rail Systems 2

Question 1

What does a red signal aspect on a Metrorail wayside or cab signal indicate to a train operator?

Accepted Answer

Stop and do not proceed without authorization

Answer

A red signal requires the operator to stop and obtain authorization before proceeding.

Question 2

On WMATA Metrorail, the third rail supplies traction power at approximately what voltage?

Accepted Answer

750 volts DC

Answer

Metrorail's third rail carries roughly 750 volts DC to power the trains.

Question 3

Before fouling the track or contacting the third rail area, a worker must confirm that power has been:

Accepted Answer

Deenergized and verified with a confirmation

Answer

Power must be confirmed deenergized before anyone works near the third rail.

Question 4

What is the primary purpose of an interlocking in a rail system?

Accepted Answer

To prevent conflicting train movements through switches and signals

Answer

Interlockings control switches and signals so conflicting routes cannot be set simultaneously.

Question 5

If a train operator loses radio contact with the Rail Operations Control Center, the correct action is to:

Accepted Answer

Stop the train and attempt to reestablish communication

Answer

Loss of communication requires stopping and reestablishing contact before proceeding.

WMATA Test Practice Test