BNSF Letp Air Brake & Train Handling Exam
UPDATED QUESTIONS AND CORRECT
ANSWERS
Draft forces are present when - CORRECT ANSWER A train is in a slack-stretched condition
To qualify a train air brake system using the Air Flow Method (AFM) the train must be equipped as
follows - CORRECT ANSWER 1. The controlling locomotive has a maintaining-type
automatic brake valve.
2. the train has gauges or device at the rear of the train.
3. The locomotive has an air flow indicator that show a direct reading of air flow in increments no
greater than 10 cubic feet per minute (CFM)
Forces are present when a train is in a slacked-bunched condition - CORRECT ANSWER Buff
An air operated electrical switch that nullifies locomotive power after an emergency or penalty brake
application is the - CORRECT ANSWER PC Switch
False gradient is a term used to describe - CORRECT ANSWER The gradient that exist when
the system is less than fully charged.
What is a full service application - CORRECT ANSWER A service reduction of brake pipe
pressure that equalizes the pressure between the brake cylinder and the auxillary reservoir.
What is the maximum independent brake cylinder pressure allowed on a locomotive with single shoe
per wheel brake rigging? - CORRECT ANSWER 72 psi
The equalizing reservoir is considered a reference volume. Why? - CORRECT ANSWER It
allows the engineer to quickly and accurately determine the level that brake pipe pressure will be
reduced to during a service brake application.
What is the maximum independent brake cylinder pressure allowed on a locomotive equipped with
clasp-type brake shoe rigging (2 shoes per wheel)? - CORRECT ANSWER 45 psi
UPDATED QUESTIONS AND CORRECT
ANSWERS
Draft forces are present when - CORRECT ANSWER A train is in a slack-stretched condition
To qualify a train air brake system using the Air Flow Method (AFM) the train must be equipped as
follows - CORRECT ANSWER 1. The controlling locomotive has a maintaining-type
automatic brake valve.
2. the train has gauges or device at the rear of the train.
3. The locomotive has an air flow indicator that show a direct reading of air flow in increments no
greater than 10 cubic feet per minute (CFM)
Forces are present when a train is in a slacked-bunched condition - CORRECT ANSWER Buff
An air operated electrical switch that nullifies locomotive power after an emergency or penalty brake
application is the - CORRECT ANSWER PC Switch
False gradient is a term used to describe - CORRECT ANSWER The gradient that exist when
the system is less than fully charged.
What is a full service application - CORRECT ANSWER A service reduction of brake pipe
pressure that equalizes the pressure between the brake cylinder and the auxillary reservoir.
What is the maximum independent brake cylinder pressure allowed on a locomotive with single shoe
per wheel brake rigging? - CORRECT ANSWER 72 psi
The equalizing reservoir is considered a reference volume. Why? - CORRECT ANSWER It
allows the engineer to quickly and accurately determine the level that brake pipe pressure will be
reduced to during a service brake application.
What is the maximum independent brake cylinder pressure allowed on a locomotive equipped with
clasp-type brake shoe rigging (2 shoes per wheel)? - CORRECT ANSWER 45 psi
