Multiple Unit Locomotives And MU Trains Flashcards by john Doheny

Battery voltage is train lined on all MU trains for what 5 items?

How is this accomplished on M3 and M7’s?

1) Propulsion Commands. 2)Braking Commands
3) Door Operations. 4)Trainline Indicators
5) Communication

M3=Through couplers on F end and 8 cables between married pairs on B end

M7=Through couplers on F end and 14 cables between married pairs on B end

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Is high voltage electricity train lined on MU trains?

No. High voltage is present between and below cars of married pairs

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What electrical power is train lined on MU trains?

Low voltage battery power

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How many jumper cables between married pairs of cars carry high voltage? M3? M7?

M3- 2 located at the B end, between married pairs,south side,outside

M7- 5 located at the B end, between married pairs,near the middle

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The inverter is located on which car of a married pair(M3)?

The A car

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Locate the auxiliary inverter(high voltage indicator lights) on M7 equipment.

A and B car

Cab side

Approximately middle of car

Ground level

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Explain the procedure to perform a DC link discharge procedure on M7 equipment.

1) Master controller in emergency
2) Ensure HV LED Indicator lights on Aux. Inverter are illuminated
3) Request removal of 3rd rail power
4) When 3rd rail is comfirmed de-energized crew member will observe HV indicator lights until extinguished.
5) When extinguished DC link is de-energized

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Is Main Reservoir air pressure train lined on M3/M7 trains?

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Name the air pressure that is train lined on M3/M7 trains?

Brake pipe

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What is standard BP and Main Reservoir pressure on M3/ M7 trains?

M3= 130-150

M7= 120-150

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True or false? Brake pipe controls service and emergency on MU trains?

False

P wire for service braking and brake pipe for emergency

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How are M3 and M7 cars numbered?

M3=9771 - 9946

M7=7001-7836

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1) What is the M3 F end coupler known as?
2) Suspended below the mechanical portion of this coupler is the electric portion that train lines low voltage and is known as_____
3) What two items are necessary when rescue is required by another type of locomotive?

1) N2A coupler
2) FL38
3) Assist Hose and End Cock

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1) The M7 mechanical coupler is known as?
2) Suspended below the mechanical portion of the coupler is the electric portion that train lines low voltage and is known as_____
3) The Drum Switch controls flow of low voltage through the BBM 122 and has 2 positions known as ____ and ____ .

1) N6 coupler
2) BBM122
3) Isolate and Through

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1) The M7 has a brake pipe assist hose and what item that replaces the Brake Pipe End Cock?
2) What are the 3 positions of this piece of equipment?

1) Three Way Valve
2) Normal-Brake pipe flow through tappet valve

Loco Haul-Brake pipe flow through Assist Hose

Reset-introduce compressed air to reset manually released parking              
            brake

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What is needed to connect a M3 to M7 for rescue purposes?

Compromise Coupler

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What device on an M7 controls the flow of brake pipe through the Assist Hose?

3 Way Valve

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Explain the proper positioning of the Drum Switch within an M7 consist?

East an west end of consist= Isolate

Coupled F end cars in consist= Through

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Where are the ASC seals located on MU equipment?

M3-B car only,cab side,in the crew locker,just past the
bathroom

M7-B car only (ATC+SSS), in the lower portion of locker, just opposite
the engineers cab

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What should be sealed in the operating pair on an M3?

ATC Snow Brake Door Bypass

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What should be sealed in the operating pair of an M7?

ATC SSS ALE

Snow Brake Bypass Door Bypass Screen Selector

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Name the indicators in the engineers cab that can be used to read trainline conditions on MU’s?

Brake pipe pressure gauge( only after a proper brake test )

Brake application light

Brake release light

Door closed light

**M7’s only parking brake indicator on TOD display

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What does a lit brake application light on a charged train indicate to the engineer?

That all air brakes are applied

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What does a lit brake release light on a charged train indicate to the engineer?

That all air and hand brakes on the train are released

During normal operations what does a lit door light on the master controller console indicate to the engineer(M3)?

That the train is charged And that all doors on the train are closed

Which 2 indicating lights in the operating cab must be illuminated for the train to take power?

Door closed light Brake release light

From top to bottom identify the 3 local indicating lights above the engineers cab door on M3 cars ( interior )

Green = local brake release light Amber= local brake applied light Red = local handbrake applied light

Name the F end exterior local indicator lights(M3's) and what they indicate when lit?

Blue= ATC operative White= door station energized Green= local air brake release light Amber= local air brake application Red= local handbrake applied

Name the F end exterior lights on M7's and what they indicate when lit?

Green= local air brakes released Amber= local air brakes applied White= door station energized Red= (flashing) local handbrake applied Blue= ATC operative

Name the M7 exterior door lights and what do they indicate?

Red=door open Amber=door disabled when flashing Red= door closing when flashing

When should door bypass be used?

1) Train doors are confirmed closed 2) Door control and Motor circuit breakers are properly positioned 3) Engineer is still unable to obtain a trainline Door Closed light

After checking doors and circuit breakers is it required to get permission before going to Door Bypass?

Crew must receive permission from 204 or transportation supervision before going to Door Bypass

If unable to get permission to go to door bypass due to communication issues how may the train proceed?

Go to Door Bypass, operate according to the rules, informing 204 as soon as possible when communication is re-established.

What does the use of Door Bypass provide?

A false Door Closed light permitting a train to draw power

Name two functions of the Door Hold Closed switch?

1) Removes operational control of the doors from the control panels 2) Cancels multiple energized door stations

When should PKO Bypass be used?

When a trains air and hand brakes are confirmed released by crew inspection and is still unable to obtain a brake release light

1) After the crew has determined that all air and hand brakes are released is it necessary to obtain permission to use PKO Bypass? 2) While operating in PKO Bypass what must the crew be observant of?

1) The crew must get permission of 204 or Transportation Supervision before going to PKO Bypass 2) The crew must observe train for smoke conditions

If unable to get permission due to communication issues crew may use PKO Bypass and operate according to the rules and inform 204 or Transportation Supervision as soon as possible when communication is re-established. True or false?

True

What does the use of PKO Bypass(power knock out) provide?

Provides a false brake release light permitting a train to draw power

The Duplex Air Pressure gauge located in the engineers cab monitors 2 pressures. Name them?

Brake pipe=White Brake cylinder=Red

What should the air pressures on the duplex air pressure gauge read on a fully charged brake pipe with master controller in max brake on M3 and M7 ?

M3 Brake pipe= 130-150 psi Brake cyl = 70+ psi M7 Brake pipe= 120-150 psi Brake cyl = 38+psi

What is the buzzer sequence to perform a class 2 brake test on M3 equipment?

OOOO OOOO O ______ ______ response

What is the buzzer sequence to perform a class 2 brake test on M7 equipment?

OOOO O OOOO O ______ ______ response

What is observed at each step of a class 2 brake test on M3 equipment?

OOOO engr release then apply brakes to test p wire train line OOOO engr release brakes then test deadman to test for train lined brake pipe O engr recharge brake pipe and release the air brake ______ brakes have applied and released on rear car and are operative ______ engr acknowledges

What is observed at each step of class 2 brake test on an M7?

OOOO engr pull the emergency brake valve handle to test train lined brake pipe O engr reset the EBVH, recharge brake pipe then release and apply the air brake to test p wire train lined OOOO engr move the master controller to emergency to test train lined EMV O engr recharge brake pipe then release and apply the air brake to test p wire train lined ______ brakes have applied and released on rear car and are operative ______ engr acknowledges

With the master controller in coast on a charged train the engr does not have a release light. What does this indicate?

This condition indicates a local brake pipe problem. At least one air or hand brake applied in the consist

With the master controller handle in the coast position on a charged train the engr has a continuous brake application light. What does this condition indicate?

This condition indicates that all air brakes on the train are applied. And is a trainline condition(potential p wire problem)

Identify the two methods for releasing stuck air brakes locally on a M3. Which is preferred and why?

``` EP cutout (electro pneumatic) 1 per car Truck cutout (truck isolation) 2 per car ``` EP cutout is preferred because it releases service brake only, while retaining emergency brake function of that car

Locate the truck cutout cocks on an M3 car?

2 truck cutouts per car F end cutout-engrs cab side directly ahead of R1 and R2 doors under the seat, inside and outside B end cutout-off cab side directly to rear of L3 and L4 doors under the seat, inside and outside

Locate the EP cutout cock on an M3 car?

There is 1 EP cutout per car Off cab side, middle of car, under back to back to back seats, accessible form both inside and outside

Name the two methods for releasing air brake locally on an M7 car. Which is preferred and why?

SBCO-(service brake cutout) releases service braking only BCCO-(brake cylinder cut out) releases service and emergency braking SBCO is preferred because you will retain emergency brake function of that truck

Locate the SBCO and BCCO on M7 equipment

2 SBCO's and BCCO's per car

Locate the EMV exhaust on an M3 pair of cars.

A car only Off cab side Middle of car Outside of car

What 2 functions of the master controller are nullified with a plugged EMV in the operating pair of an M3 train?

Deadman and emergency

Would deadman protection need to be provided if the EMV was plugged in the middle of an 8 car M3 consist? Explain.

No EMV's are not train lined on M3's

Locate the EMV on an M7 pair of cars

Both A and B car Inside only Behind the L1 door Floor level

Are EMV's train lined on M7's?

Yes

Describe how a closed brake pipe cutout in the middle of a MU consist would affect the brakes on a train.

Service braking unchanged since it is p wire controlled Emergency brake application by EBVH on all MU's Or an M3 master controller Would propagate an emergency brake application Up to the closed valve Emergency brake application by master controller on M7 Would function normally provided at least 1 EMV Is cut in on both sides of the closed Brake pipe cutout