V11-C6 Flashcards
1
Q
When are grade crossing to automatically activated for a train
A
500 feet from a crossing leaving approximately 20 seconds between activation and train arrival
2
Q
What designate an emergency trip station or traction power substations for metro rail
A
An illuminated blue light and a red security box. the light only indicates location not whether power is on or off
3
Q
What’s the voltage of the trains on the metro blueline
A
750 V
4
Q
What is the overhead catenary system
A
The overhead power lines that supply electricity to metro rail
5
Q
What is the pantograph
A
The articulating electric power collection device fixed a top the metro car
6
Q
What’s the height of the overhead catenary system
A
18 to 22 feet
