Underframe Revision Questions Flashcards

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1
Q

What is the Purpose of the Red EC isolating cock?

A

To isolate the primary safety equipment in the lead cab

• Trip
• Emergency Application Valve
• Control Governor
• Hand Pilot Valve
• Anti-Neutralisation device
• VICERS Activation Valve

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2
Q

What is the purpose of the yellow TECHAV cock?

A

Isolate the Saftey apparatus on the trailing motor

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3
Q

What is the purpose of the MR to brake controller isolate cock?

A

When OPEN, allows main res air to flow to the brake controller for operation of the automatic air brake

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4
Q

What is the purpose of the frequency generator?

A

Located on every odd numbered wheel
Sends message to the spin slide equipment to monitor and correct wheel slip

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5
Q

Where is the speedometer generator located?

A

Number 8 wheel of a motor car

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6
Q

Which type of comeng uses Tread/ Disc brake?

A

Westcode tread
Knorr Disc

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7
Q

The Scharfenberg coupler enables what kind of connection?

A

Mechanical
Electrical
Pneumatic

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8
Q

How do you uncouple 2 units ?

A

Via two push buttons located in the drivers cab

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9
Q

What parts of the coupler must you check before coupling?

A
  • The painted indicator
  • Selection lever for non electric coupling
  • Main res and brake pipe isolating cocks
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10
Q

What is the transition coupler for?

A

To connect our trains to locomotives
We don’t fit these

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11
Q

What are the two small reservoirs under the drivers cab?

A

Closest to the drivers side is the Equalising reservoir
On the A side is the Panto storage reservoir

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12
Q

On a westcode, what would be the first isolating cock on A side of the motor?

A

Number 1 air suspension isolating cock

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13
Q

On Knorr what is the first cock on A side?

A

Number 1 spring park brake isolating cock

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14
Q

What does the air compressor do?

A

Supplies compressed air to the main reservoir, this operates on 1500v DC

Motor alternator must be running

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15
Q

What does the control res do?

A

Supplies compressed air to operate the EP vavles in the main equipment case
It’s also supplies compressed air to the Trip latching lever

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16
Q

If the compressor governor isolating cock is turned, what will be the effect?

A

Isolates the flow of main res air to the compressor governor so it will think the main res will have no air and will keep running because it doesn’t have proper monitoring

17
Q

What is the purpose of the hand release wires attached to the brake units?

A

When pulled and held it will open causing brake cylinder air to exhaust to atmosphere

18
Q

What does the auxiliary isolate switch isolate?

A

1500v DC supply to the motor alternator and air compressor

19
Q

What does the Panto interlock isolate do?

A

Isolated the supply of main res air to the pantograph causing it to lower on that motor
This switch is interlocked with the auxiliary Isolating switch and must be turned before it

20
Q

What is the main switch for?

A

Isolates 1500v DC supply to the line breakers and traction motors

21
Q

Do drivers ever need to access the equipment in the main, auxiliary and line breaker cases?

A

No

22
Q

What do the bogie isolating cocks do?

A

Stops friction brakes from apply on bogie

23
Q

What do the spring park brake isolate cocks isolate?

A

The flow of main res air to each spring park brake on that bogie

24
Q

What do the airbag isolate cocks isolate?

A

Isolates main res air to bogie air bags due to ruptures

25
Q

What electrical cables and air pipes run through the semi permanent coupler?

A
  • Main res and brake pipe
  • 110v DC Train Cable
  • 415v AC Cables
  • CCTV Cable
26
Q

What is the power input and output of the MA?

A

Input -1500vDC
Output- 415v AC

27
Q

What is the emergency battery box for?

A

Provides backup lighting in cab and saloon for 2 hours in case of power failure
Green is charged/charging
Red is low battery voltage

28
Q

What equipment has an input of 1500v DC? (3 answers)

A
  • Air Compressor
  • Motor alternator
  • Traction Motors
29
Q

What equipment does the MA power with 415v? (4 answers)

A

• Saloon Lighting
• Headlights
• Air con
• Traction cooling fan

30
Q

What are the resets on the MA for?

A

To reset the MA

31
Q

Which valve on the brake unit is used for EP braking?

A

7 step relay

32
Q

Which valve on the brake unit is used for air braking?

A

Triple valve

33
Q

What are the auxiliary reservoirs for?

A

Stores compressed air to feed into brake cylinder while air braking

34
Q

What are the 3 extra res on the Knorr motor?

A
  • Pre control res
  • supplementary res
  • EP res