Train Pressures Refresher Flashcards
In a Comeng at what KPA does the control governor open?
310kpa-340kpa
In a Comeng at what KPA does the control governor close?
400kpa-430kpa
In a Comeng what is the lowest brake pipe pressure for the train to operate?
425KPA
In a Comeng, what should the operating brake pipe pressure be?
550kpa
After a full service application, what should the pressure be in the brake pipe?
380kpa-410kpa
In a Comeng what is the kpa in the brake cylinders during a full service AIR brake application?
275kpa
In a Comeng what is the brake cylinder pressure for a full service application running on EP?
250kpa
In a Comeng what is the main res operating pressure?
585-725kpa
In a Comeng at what MR pressure will the LP flag rise indicating low main res pressure?
500KPA
In a comeng What pressure should be in the panto res before stabling?
700kpa
In a Comeng what should the pressure be in the control res?
490kpa-510kpa
In a Comeng what pressure should the brake pipe drop below for a trip test?
150KPA
In a Comeng when doing continuity, what should the pressure fall below and how long should it take to recover?
Pull tap for 15 seconds and BP to drop below 300KPA
Close the tap and it should recover within 40seconds
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?
290kpa
In a Siemens, what is operating MR pressure?
850kpa-1000kpa
In a Siemens, what pressure do SPB automatically apply?
When main res drops below 350kpa + or - 30kpa
When using the towing cock, what pressure will main res drop to rescue a Comeng?
From 850kpa-1000kpa to 700kpa
What is emergency brake pressure for a Siemens?
280kpa
What is B6 pressure for a Siemens?
189kpa
What is holding pressure for a Siemens?
110kpa
In a Siemens at what pressure does the uncouple button flash?
750kpa
In a Siemens at what pressure does the compressor light come on?
850kpa
In an Xtrapolis, at what pressure do both compressors activate?
Any pressure below 650kpa
At what pressure do the safety valves activate on an Xtrapolis?
980kpa
In an Xtrapolis what is the main res operating pressures?
750kpa-900kpa
What is full service pressure for an xtrap?
190kpa
In an Xtrapolis what is emergency pressure?
210kpa
In an Xtrapolis what is holding pressure?
120kpa
In a Siemens at what pressure does the safety loop open?
Below 600kpa
In an Xtrapolis at what pressure does the low main res fault light come on?
650kpa
In an Xtrapolis when rescuing, at what brake pipe pressure does the safety loop open?
300KPA
In an Xtrapolis when rescuing, at what brake pipe pressure does the safety loop close?
430kpa
In an Xtrapolis when rescuing, at what brake pipe pressure when rising does traction become available?
480kpa
How are spring park brakes applied and released?
Released by main res air compressing the spring
Applied by spring tension on wheels
In an Xtrapolis, what main res pressure will open the safety loop?
580kpa
What’s emergency pressure in the HCMT?
280kpa - 460kpa
What pressure is the holding brake for the HCMT?
140kpa - 240kpa
What is full service pressure on a HCMT?
250kpa - 380kpa
