UNION PACIFIC AIR BRAKES
CORRECT 100%
what % of operative brake equipment must trains have under all circumstances? -
ANSWER85%
what is the air pressure regulating valve or "brake pipe" pressure set to for yard and
freight service? - ANSWER90%
when an air brake test requires an inspection to determine that the brakes apply and
release on the rear car of the train, what action would fulfill this requirement? -
ANSWER5 pound increase and a 5 pound decrease
What is the function of a retaining valve in the HIGH PRESSURE (HP) position? -
ANSWERretains 20 pounds set.
Would a Class 1 air brake test need to be done on a solid block of cars being added
to your train? - ANSWERNo, its already been performed
When would a class 1 air brake test need to be performed on a portion of the train or
on cars added to the train? - ANSWERwhen they are not a solid block
If trains have been separated for more than 4 hours, what air brake test is required
after re-coupling to cars? - ANSWERClass 1
what is the initial method to test brake pipe leakage? - ANSWERair flow method
the brake system for freight trains must be charged to a minimum requirement of at
least ______PSI at the REAR before an air test can begin. - ANSWER75
when air flow does not exceed _____CFM, test is complete. - ANSWER60
Using the air flow method , what is the indication that there is a excessive leakage? -
ANSWERIf my CFM never gets below 60
What test is required when a train does not met the AFM requirements? -
ANSWERBrake pipe leakage test
What is the minimum PSI the brake system must be charged to as indicated by a
gauge or device at the rear of your train? - ANSWER75 PSI
During the last 1 minute wait, what is the maximum allowed leakage? - ANSWER5
PSI
What is the proper piston travel for body mounted brake cylinder? -
ANSWERBetween 6-9 inches
CORRECT 100%
what % of operative brake equipment must trains have under all circumstances? -
ANSWER85%
what is the air pressure regulating valve or "brake pipe" pressure set to for yard and
freight service? - ANSWER90%
when an air brake test requires an inspection to determine that the brakes apply and
release on the rear car of the train, what action would fulfill this requirement? -
ANSWER5 pound increase and a 5 pound decrease
What is the function of a retaining valve in the HIGH PRESSURE (HP) position? -
ANSWERretains 20 pounds set.
Would a Class 1 air brake test need to be done on a solid block of cars being added
to your train? - ANSWERNo, its already been performed
When would a class 1 air brake test need to be performed on a portion of the train or
on cars added to the train? - ANSWERwhen they are not a solid block
If trains have been separated for more than 4 hours, what air brake test is required
after re-coupling to cars? - ANSWERClass 1
what is the initial method to test brake pipe leakage? - ANSWERair flow method
the brake system for freight trains must be charged to a minimum requirement of at
least ______PSI at the REAR before an air test can begin. - ANSWER75
when air flow does not exceed _____CFM, test is complete. - ANSWER60
Using the air flow method , what is the indication that there is a excessive leakage? -
ANSWERIf my CFM never gets below 60
What test is required when a train does not met the AFM requirements? -
ANSWERBrake pipe leakage test
What is the minimum PSI the brake system must be charged to as indicated by a
gauge or device at the rear of your train? - ANSWER75 PSI
During the last 1 minute wait, what is the maximum allowed leakage? - ANSWER5
PSI
What is the proper piston travel for body mounted brake cylinder? -
ANSWERBetween 6-9 inches
