BNSF LETP AIR BRAKE & TRAIN
HANDLING
The equalizing reservoir is considered a reference volume. Why? - ✔️✔️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)? - ✔️✔️45 psi
Movement of part of a coupled train at a speed differrent from another part of the train is
referred to as: - ✔️✔️Slack action
The main reservoirs on the locomotive serve what purpose? - ✔️✔️They store , cool
and dry the supply of compressed air used for the brake system and air operated
auxiliary devices.
Draft forces are present when - ✔️✔️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 - ✔️✔️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 - ✔️✔️Buff
An air operated electrical switch that nullifies locomotive power after an emergency or
penalty brake application is the - ✔️✔️PC Switch
Release - ✔️✔️Charges the brake pipe to regulating valve setting and releases the
locomotive and train brakes.
Emergency - ✔️✔️Vents brake pipe pressure directly to the atmosphere, causing
brakes to apply at an emergency rate.
False gradient is a term used to describe - ✔️✔️The gradient that exist when the
system is less than fully charged.
What is a full service application - ✔️✔️A service reduction of brake pipe pressure that
equalizes the pressure between the brake cylinder and the auxillary reservoir.
HANDLING
The equalizing reservoir is considered a reference volume. Why? - ✔️✔️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)? - ✔️✔️45 psi
Movement of part of a coupled train at a speed differrent from another part of the train is
referred to as: - ✔️✔️Slack action
The main reservoirs on the locomotive serve what purpose? - ✔️✔️They store , cool
and dry the supply of compressed air used for the brake system and air operated
auxiliary devices.
Draft forces are present when - ✔️✔️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 - ✔️✔️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 - ✔️✔️Buff
An air operated electrical switch that nullifies locomotive power after an emergency or
penalty brake application is the - ✔️✔️PC Switch
Release - ✔️✔️Charges the brake pipe to regulating valve setting and releases the
locomotive and train brakes.
Emergency - ✔️✔️Vents brake pipe pressure directly to the atmosphere, causing
brakes to apply at an emergency rate.
False gradient is a term used to describe - ✔️✔️The gradient that exist when the
system is less than fully charged.
What is a full service application - ✔️✔️A service reduction of brake pipe pressure that
equalizes the pressure between the brake cylinder and the auxillary reservoir.
