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

Proceed at full speed

Answer

Reduce speed to 35 mph

Answer

Approach the next station

Question 2

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

Accepted Answer

750 volts DC

Answer

120 volts AC

Answer

25,000 volts AC

Answer

12 volts DC

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

Reduced to half voltage

Answer

Switched to backup

Answer

Left on for testing

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

To charge train batteries

Answer

To clean the rails

Answer

To announce stations

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

Continue at full speed

Answer

Ignore it until the next station

Answer

Reverse direction immediately

Question 6

Automatic Train Control (ATC) on Metrorail is mainly designed to:

Accepted Answer

Maintain safe spacing and enforce speed limits between trains

Answer

Sell fare cards

Answer

Light the stations

Answer

Open platform doors

Question 7

A 'gauge' in railroad terms refers to the distance between:

Accepted Answer

The inner faces of the two running rails

Answer

Two stations

Answer

Signal posts

Answer

Platform edges