Metro ESM 7D Flashcards Preview

04. Metro ESM > Metro ESM 7D > Flashcards

Flashcards in Metro ESM 7D Deck (41)
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1
Q

From the Metro ESM:

When decellerating from speed, the dynamic braking system ________________ of the voltage applied to the traction motor field windings, causing car to slow down.

A

reverses the polarity

2
Q

From the Metro ESM:

In the dynamic braking system, excess voltage is sent to the ______________ to be dissipated as ____________

A

resistor grid; thermal heat

3
Q

From the Metro ESM:

Where are the resistor grids located on Rohr cars?

A

Underside of operators side of rail car, behind the motor control boxes.

4
Q

From the Metro ESM:

Resistor grids can reach ________ F

A

800 degrees

5
Q

From the Metro ESM:

The Rohr “AC” traction motors are __________ than their “DC” counterparts found on Breda cars.

A

slightly smaller

6
Q

From the Metro ESM:

Rohr cars use a ____________________ as the primary suspension system

A

clam shaped rubber suspension

7
Q

From the Metro ESM:

Which air compressor system reacts slower, Rohr or Breda?

A

Rohr

8
Q

From the Metro ESM:

Can the Rohr car air bag suspension system be disabled?

A

NO

9
Q

From the Metro ESM:

The connection between Rohr cars in a married pair is a ______________.

A

semi-permanent draw bar

10
Q

From the Metro ESM:

Can a Rohr married pair be easily separated in the field?

A

NO

11
Q

From the Metro ESM:

To remove the side window of a Rohr car, __________ that holds the metal frame in the opening.

A

remove the zip strip gasket

12
Q

From the Metro ESM:

How many fire extinguishers are located on Rohr cars? Where are they?

A

One; located in operators compartment.

13
Q

From the Metro ESM:

On Rohr cars, the center sliding doors can be manually opened ________ ways.

A

two (2)

14
Q

From the Metro ESM:

The easiest way to open the emergency side door of a Rohr car is to use the __________________.

A

passenger emergency evacuation handles.

15
Q

From the Metro ESM:

The first step of the second method to open the center sliding doors on Rohr cars is to ____________________

A

locate the slotted locking screws for the panels beside the sliding doors.

16
Q

From the Metro ESM:

How many slotted locking screws are located on the panels beside the center sliding doors on Rohr cars?

A

two (2)

17
Q

From the Metro ESM:

Once the panel beside the center sliding doors on a Rohr car is removed, what should you locate? What do you do next?

A

red painted lever; pull handle down to release the door and manually push door open.

18
Q

From the Metro ESM:

Where is the emergency evacuation ladder on a Rohr car?

A

Under the first side facing seat next to door #7

19
Q

From the Metro ESM:

What is the emergency evaucation ladder on a Rohr car constructed of?

A

Wood with a hinge in the middle

20
Q

From the Metro ESM:

What are the dimensions of the Rohr car emergency evacuation ladder?

A

When extended, 57 inches in length and 13 inches wide

21
Q

From the Metro ESM:

What are the pins for on a Rohr car emergency evacuation ladder?

A

To attach the ladder to the top of the anti-climber at the front of the rail car.

22
Q

From the Metro ESM:

Rohr cars have _________ seats that the Breda cars.

A

twelve more

23
Q

From the Metro ESM:

The handrails on the tops of the seat backs in Rohr cars are __________.

A

smooth polished metal

24
Q

From the Metro ESM:

The handrails on the tops of the seat backs in Breda cars are __________.

A

brown non-slip grip rails

25
Q

From the Metro ESM:

WMATA has modified _________ of _______ cars to be used as revenue retrieval trains.

A

two married pairs; Rohr

26
Q

From the Metro ESM:

What has been modified on the revenue retrieval trains?

A

Seats in one car of married pair have been removed, replaced with brackets to hold money carts?

27
Q

From the Metro ESM:

What are the hours that revenue retrieval trains will run?

A

Revenue trains will run during regular hours and during non-revenue hours 0100 - 05:30.

28
Q

From the Metro ESM:

Who works on the Metro revenue retrieval trains?

A

Transit Police along with revenue personnel.

29
Q

From the Metro ESM:

How many Breda cars with the cam-controller were ordered initially, and what series were they numbered?

A

76 cars; 2000

30
Q

From the Metro ESM:

How many Breda cars with the chopper controller were ordered initially, and what series were they numbered?

A

18 cars; 3000

31
Q

From the Metro ESM:

The first revenue runs for the Breda 2000 series rail cars did not occur until _________

A

December 1983.

32
Q

From the Metro ESM:

Cam controllers vary the current flow to the traction through a series of mechanical _________ switches controlled by cams.

A

“make and break”

33
Q

From the Metro ESM:

Which rail car system requires more maintenance, chopper controllers or cam controllers?

A

Cam controllers, many working parts.

34
Q

From the Metro ESM:

Do Breda 2000 rail cars have capacitors to store 3rd rail power?

A

No.

35
Q

From the Metro ESM:

What color are the motor controller boxes on Breda cars and are they marked?

A

Gray/brown; no they are not marked.

36
Q

From the Metro ESM:

Do Breda 2000 rail cars have a resistor grid?

A

Yes, extensive.

37
Q

From the Metro ESM:

Where are the resistor grivds located on Breda 2000 rail cars?

A

Along the underside of the operators side of car, flush with the side of car.

38
Q

From the Metro ESM:

Where is the battery compartment located on Breda 2000 cars?

A

Underside of the “B” car on the opposite side of the car from operators compartment

39
Q

From the Metro ESM:

To access the battery compartment on a Breda rail car you have to remove a ____________

A

locking bar on the outside of the battery box.

40
Q

From the Metro ESM:

How many bolts must be removed to access the batteries on a Breda rail car.

A

Three (3).

41
Q

From the Metro ESM:

On a Breda rail car, can the batteries be accessed if the battery box is on the same side as the 3rd rail?

A

No, there is not enough clearance. You will strike the top of 3rd rail cover.