Traction Siemens - Pneumatics Flashcards

1
Q

What makes up the air supply unit

A

Air compressor
Air dryers
Compressors pressure switch

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2
Q

What are the pressures on the two safety valves in the air supply system

A

Comp and airdryers valve - 1100
Air dryers and MR 1050

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3
Q

What is the air compressor governor set to (to start compressor)

A

850kpa

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4
Q

What is MR operating pressure

A

850-1000kpa

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5
Q

If the pressure governor has been isolated will the air compressor run continuously?

A

Yes

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6
Q

What makes up the air suspension system (3)

A

Levelling valves
Air bags
Surge reservoirs

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7
Q

What does the levelling valve do

A

Inflates and deflates air bags according to loading

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8
Q

How many levelling valves on no.1 bogie T car

A

2

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9
Q

What us thr brake control system made up of (4)

A

Service
Holding
Emg
Park brake

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10
Q

What does service brake use

A

EP and ED

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11
Q

What speed does EP use

A

Up to 10km

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12
Q

What is holding brake pressure

A

110kpa

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13
Q

What is B1 pressure?

A

57kpa

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14
Q

Can the train roll if MC moved from 0 to B1/2/3?

A

Yes as they have less brake cylinder pressure than holding

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15
Q

When service brake apply, what two lights will flash?

A

Maintenance and general fault (not an issue)

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16
Q

How long must MC remain in 0 before moving handle to power to brake or vice versa?

17
Q

Does SPB apply automatically when key is removed?

18
Q

What pressure does MR need to fall below to apply SPB?

19
Q

Where are park brake cylinders located?

A

Wheels 3 and 7 on all cars

20
Q

What speed if park brake applied will safety loop deenergise?

21
Q

Train will default to EP if braking effort falls below what %

22
Q

What do the sanders work in conjunction with (2)

A

BCU and Wheel slip unit

23
Q

What 4 things are fitted to each sand box

A

Padlock
Red LED (sand below 20%)
White manual test button
Sight glass

24
Q

What temperature do the sander heaters activate

25
What speed do sanders not operate below?
5km
26
How long do you press the sanding button for and how long do you ensure sand flows
1 and 1 second