Train Pressures Refresher

Question 1

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

Answer 1

310kpa-340kpa

Question 2

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

Answer 2

400kpa-430kpa

Question 3

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

Answer 3

425KPA

Question 4

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

Answer 4

550kpa

Question 5

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

Answer 5

380kpa-410kpa

Question 6

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

Answer 6

275kpa

Question 7

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

Answer 7

250kpa

Question 8

In a Comeng what is the main res operating pressure?

Answer 8

585-725kpa

Question 9

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

Answer 9

500KPA

Question 10

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

Answer 10

700kpa

Question 11

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

Answer 11

490kpa-510kpa

Question 12

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

Answer 12

150KPA

Question 13

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

Answer 13

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

Close the tap and it should recover within 40seconds

Question 14

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?

Answer 14

290kpa

Question 15

In a Siemens, what is operating MR pressure?

Answer 15

850kpa-1000kpa

Question 16

In a Siemens, what pressure do SPB automatically apply?

Answer 16

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

Question 17

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

Answer 17

From 850kpa-1000kpa to 700kpa

Question 18

What is emergency brake pressure for a Siemens?

Answer 18

280kpa

Question 19

What is B6 pressure for a Siemens?

Answer 19

189kpa

Question 20

What is holding pressure for a Siemens?

Answer 20

110kpa

Question 21

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

Answer 21

750kpa

Question 22

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

Answer 22

850kpa

Question 23

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

Answer 23

Any pressure below 650kpa

Question 24

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

Answer 24

980kpa

Question 25

In an Xtrapolis what is the main res operating pressures?

Answer 25

750kpa-900kpa

Question 26

What is full service pressure for an xtrap?

Answer 26

190kpa

Question 27

In an Xtrapolis what is emergency pressure?

Answer 27

210kpa

Question 28

In an Xtrapolis what is holding pressure?

Answer 28

120kpa

Question 29

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

Answer 29

Below 600kpa

Question 30

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

Answer 30

650kpa

Question 31

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

Answer 31

300KPA

Question 32

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

Answer 32

430kpa

Question 33

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

Answer 33

480kpa

Question 34

How are spring park brakes applied and released?

Answer 34

Released by main res air compressing the spring | Applied by spring tension on wheels

Question 35

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

Answer 35

580kpa

Question 36

What’s emergency pressure in the HCMT?

Answer 36

280kpa - 460kpa

Question 37

What pressure is the holding brake for the HCMT?

Answer 37

140kpa - 240kpa

Question 38

What is full service pressure on a HCMT?

Answer 38

250kpa - 380kpa