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Metro157 > Train Pressures Refresher > Flashcards

Train Pressures Refresher Flashcards

1
Q

In a Comeng at what KPA does the control governor open?

A

310kpa-340kpa

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2
Q

In a Comeng at what KPA does the control governor close?

A

400kpa-430kpa

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3
Q

In a Comeng what is the lowest brake pipe pressure for the train to operate?

A

425KPA

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4
Q

In a Comeng, what should the operating brake pipe pressure be?

A

550kpa

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5
Q

After a full service application, what should the pressure be in the brake pipe?

A

380kpa-410kpa

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6
Q

In a Comeng what is the kpa in the brake cylinders during a full service AIR brake application?

A

275kpa

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7
Q

In a Comeng what is the brake cylinder pressure for a full service application running on EP?

A

250kpa

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8
Q

In a Comeng what is the main res operating pressure?

A

585-725kpa

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9
Q

In a Comeng at what MR pressure will the LP flag rise indicating low main res pressure?

A

500KPA

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10
Q

In a comeng What pressure should be in the panto res before stabling?

A

700kpa

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11
Q

In a Comeng what should the pressure be in the control res?

A

490kpa-510kpa

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12
Q

In a Comeng what pressure should the brake pipe drop below for a trip test?

A

150KPA

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13
Q

In a Comeng when doing continuity, what should the pressure fall below and how long should it take to recover?

A

Pull tap for 15 seconds and BP to drop below 300KPA

Close the tap and it should recover within 40seconds

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14
Q

In a Comeng when testing the hand pilot valve and control governor traction test, what should the brake pipe drop too when testing for traction?

A

290kpa

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15
Q

In a Siemens, what is operating MR pressure?

A

850kpa-1000kpa

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16
Q

In a Siemens, what pressure do SPB automatically apply?

A

When main res drops below 350kpa + or - 30kpa

17
Q

When using the towing cock, what pressure will main res drop to rescue a Comeng?

A

From 850kpa-1000kpa to 700kpa

18
Q

What is emergency brake pressure for a Siemens?

A

280kpa

19
Q

What is B6 pressure for a Siemens?

A

189kpa

20
Q

What is holding pressure for a Siemens?

A

110kpa

21
Q

In a Siemens at what pressure does the uncouple button flash?

A

750kpa

22
Q

In a Siemens at what pressure does the compressor light come on?

A

850kpa

23
Q

In an Xtrapolis, at what pressure do both compressors activate?

A

Any pressure below 650kpa

24
Q

At what pressure do the safety valves activate on an Xtrapolis?

A

980kpa

25
Q

In an Xtrapolis what is the main res operating pressures?

A

750kpa-900kpa

26
Q

What is full service pressure for an xtrap?

A

190kpa

27
Q

In an Xtrapolis what is emergency pressure?

A

210kpa

28
Q

In an Xtrapolis what is holding pressure?

A

120kpa

29
Q

In a Siemens at what pressure does the safety loop open?

A

Below 600kpa

30
Q

In an Xtrapolis at what pressure does the low main res fault light come on?

A

650kpa

31
Q

In an Xtrapolis when rescuing, at what brake pipe pressure does the safety loop open?

A

300KPA

32
Q

In an Xtrapolis when rescuing, at what brake pipe pressure does the safety loop close?

A

430kpa

33
Q

In an Xtrapolis when rescuing, at what brake pipe pressure when rising does traction become available?

A

480kpa

34
Q

How are spring park brakes applied and released?

A

Released by main res air compressing the spring

Applied by spring tension on wheels

35
Q

In an Xtrapolis, what main res pressure will open the safety loop?

A

580kpa

36
Q

What’s emergency pressure in the HCMT?

A

280kpa - 460kpa

37
Q

What pressure is the holding brake for the HCMT?

A

140kpa - 240kpa

38
Q

What is full service pressure on a HCMT?

A

250kpa - 380kpa

Metro157 (81 decks)

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