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Technician Exam > Metro ESM4 > Flashcards

Metro ESM4 Flashcards

1
Q

Throughout the Metro Rail System the Operations Control Center (OCC) controls the “revenue areas.” These areas are defined as:

A

The areas that include the rails and stations from one end of a line to the opposite end of the line and areas where passengers have access to ride the system.

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2
Q

Wayside Telephones in the Metro Rail System can be found in the ETS (blue light) boxes located _________.

A

At the end of every station platform.
Occasionally in some service rooms.
Along the track right-of-way at approximately 800-foot intervals

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3
Q

As trains in the Metro Rail System move forward in the tunnel air is forced ahead of the train and air is also drawn behind the train. This is known as:

A

The piston effect.

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4
Q

Fixed Temperature Detectors in the Metro Rail System activate when the ambient temperature exceeds:

A

135 degrees Fahrenheit.

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5
Q

Standpipe outlets in the platform floor of the Metro Rail System are located every:

A

200 ft

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6
Q

The WSAD used in the Metro Rail System will produce an audible alarm when 50 volts or more are detected, however the strobe light will not activate until ____ volts or more are detected.

A

400

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7
Q

The controls for the Metro escalators are located?

A

On the left side of the escalators as you face them.

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8
Q

“No Clearance” signs are located in areas where insufficient clearance exists along the Metro rail system. How far apart are these signs?

A

50 feet

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9
Q

How many hours will the emergency battery power last when the tunnel emergency power is on?

A

3 hours

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10
Q

What is the Metro radio system code designation for smoke in a rail car or in a station or tunnel?

A

Gray-gray

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11
Q

Vent shafts are found within ____ feet of the ends of subsurface stations?

A

100

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12
Q

Circuit breaker facilities for traction power are located approximately how far from the traction power substations?

A

1/2 Mile

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13
Q

Chain Marker sign in the Metro is displayed how far along the right-of- way?

A

Every 100 feet

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14
Q

In a metro station, if the heat or smoke alarm activates and is not reset, how long do the fare gates take to lock in the open position?

A

30 seconds

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15
Q

Fans shaft in METRO tunnels contain how many 60 inch fans?

A

2-7

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16
Q

Fans in METRO tunnels SUPPLY how many cfm’s of air?

A

35,000

17
Q

Fans in the Metro tunnels EXHAUST how many cfm’s of air?

A

50,000

18
Q

What is the primary means of evacuation from a metro station?

A

Escalators

19
Q

A metro subway station could have up to how many elevator rooms?

A

4

20
Q

To originate a call from the elevator care what button do you push?

A

The push to talk button

21
Q

Brushes recently added to the escalators in metro to prevent passengers from being caught between the sidewalls and moving steps are known as what?

A

London Brushes

22
Q

Any Metro emergency within the yard or yard tracks must be coordinated through?

A

Yardmaster

23
Q

PABX (Private Automatic Branch Exchange) phones are not part of the wayside telephone system. They are found in service rooms, fan shafts, and also part of the kiosk phone links. What color are these phones?

A

Tan

24
Q

When OCC is notified that there is a need for the fans to be activated there is a delay of up to how long before the system may be started?

A

40-60 seconds

25
Q

The three types of gases that Metro considers to be the most likely to enter the system.

A

Gasoline, LPG, Natural gas

26
Q

In addition to OCC (Operations Control Center) not controlling 3rd rail power, what other hazard exists in a “start up area”?

A

Trains running on either track in either direction

27
Q

When utilizing a PABX (Private automatic branch) system telephone OCC (Operations Control Center) can be contacted by dialing ___________.

A

1970

28
Q

If a fire is reported in the under-platform ventilation system, where would you expect to see smoke coming from when you arrive?

A

Under the platform edge, nearest the track bed & possibly the track bed itself

29
Q

One type of automatic fire suppression system used by Metro utilizes Halon 1301. What type of ventilation should be used on a room where Halon has been discharged?

A

Mechanical ventilation because the product is heavier then air.

30
Q

What are the two distinct ventilation conditions inside metro tunnels and underground stations?

A

Normal and Emergency

Technician Exam (7 decks)

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