Jakes Union Pacific EXAM STUDY GUIDE
2026/2027 COMPLETE QUESTIONS WITH
VERIFIED CORRECT ANSWERS || 100%
GUARANTEED PASS NEWEST VERSION
1. What is the primary purpose of the locomotive air brake system?
A) To slow and stop the train using compressed air
B) To provide air for the horn
C) To operate the windshield wipers
D) To supply air to the cab
Correct Answer: A
Rationale: The primary purpose of the locomotive air brake system is to slow and stop
the train using compressed air. The system applies brakes on both the locomotive and
train cars through the brake pipe.
2. What is the normal range of brake pipe pressure in a freight train?
A) 70-80 psi
B) 80-90 psi
C) 90-110 psi
D) 110-120 psi
Correct Answer: B
Rationale: The normal brake pipe pressure for freight trains is typically 80-90 psi.
Passenger trains may operate at 110 psi.
3. What is the emergency brake application on a train?
A) A rapid reduction of brake pipe pressure
B) A slow reduction of brake pipe pressure
C) An increase in brake pipe pressure
D) No change in brake pipe pressure
Correct Answer: A
Rationale: An emergency brake application is a rapid reduction of brake pipe pressure
,that causes all brakes on the train to apply immediately. This is achieved by venting the
brake pipe to atmosphere.
4. What is the purpose of the angle cock on a train?
A) To open and close the brake pipe
B) To open and close the main reservoir
C) To open and close the auxiliary reservoir
D) To open and close the emergency reservoir
Correct Answer: A
Rationale: The angle cock is a valve located at the ends of cars that opens and closes
the brake pipe. It is used to connect or disconnect the brake pipe between cars.
5. What is the "dead man's pedal" or "alerter" on a locomotive?
A) A safety device that requires the engineer to acknowledge an alarm
B) A device that controls the throttle
C) A device that controls the brakes
D) A device that controls the horn
Correct Answer: A
Rationale: The alerter (also known as the "dead man's pedal") is a safety device that
requires the engineer to acknowledge an alarm at regular intervals. If not acknowledged,
the train will stop.
6. What is the FRA requirement for air brake tests?
A) A test must be performed at the beginning of each trip
B) A test must be performed every 24 hours
C) A test must be performed every 8 hours
D) A test must be performed at the end of each trip
Correct Answer: A
Rationale: FRA regulations require that an air brake test be performed at the beginning
of each trip. This includes a brake pipe leakage test and a functional brake test.
7. What is the maximum allowed brake pipe leakage per minute?
A) 1 psi per minute
B) 2 psi per minute
, C) 5 psi per minute
D) 10 psi per minute
Correct Answer: C
Rationale: The maximum allowed brake pipe leakage is 5 psi per minute. Leakage
greater than this indicates a problem with the air brake system.
8. What is the purpose of the "Independent Brake" on a locomotive?
A) To apply brakes to the locomotive only
B) To apply brakes to the train cars only
C) To apply brakes to the entire train
D) To release brakes from the entire train
Correct Answer: A
Rationale: The independent brake applies brakes to the locomotive only. It is used for
controlling the locomotive independently of the train brakes.
9. What is the purpose of the "Automatic Brake" on a locomotive?
A) To apply brakes to the locomotive only
B) To apply brakes to the train cars only
C) To apply brakes to the entire train
D) To release brakes from the entire train
Correct Answer: C
Rationale: The automatic brake applies brakes to the entire train. It is used for slowing
and stopping the train.
10. What is the "brake pipe" on a train?
A) The air line that runs the length of the train
B) The air line that supplies air to the horn
C) The air line that supplies air to the cab
D) The air line that supplies air to the engine
Correct Answer: A
Rationale: The brake pipe is the air line that runs the length of the train and carries the
air pressure that controls the brakes.
11. What is the "auxiliary reservoir" on a train car?
2026/2027 COMPLETE QUESTIONS WITH
VERIFIED CORRECT ANSWERS || 100%
GUARANTEED PASS NEWEST VERSION
1. What is the primary purpose of the locomotive air brake system?
A) To slow and stop the train using compressed air
B) To provide air for the horn
C) To operate the windshield wipers
D) To supply air to the cab
Correct Answer: A
Rationale: The primary purpose of the locomotive air brake system is to slow and stop
the train using compressed air. The system applies brakes on both the locomotive and
train cars through the brake pipe.
2. What is the normal range of brake pipe pressure in a freight train?
A) 70-80 psi
B) 80-90 psi
C) 90-110 psi
D) 110-120 psi
Correct Answer: B
Rationale: The normal brake pipe pressure for freight trains is typically 80-90 psi.
Passenger trains may operate at 110 psi.
3. What is the emergency brake application on a train?
A) A rapid reduction of brake pipe pressure
B) A slow reduction of brake pipe pressure
C) An increase in brake pipe pressure
D) No change in brake pipe pressure
Correct Answer: A
Rationale: An emergency brake application is a rapid reduction of brake pipe pressure
,that causes all brakes on the train to apply immediately. This is achieved by venting the
brake pipe to atmosphere.
4. What is the purpose of the angle cock on a train?
A) To open and close the brake pipe
B) To open and close the main reservoir
C) To open and close the auxiliary reservoir
D) To open and close the emergency reservoir
Correct Answer: A
Rationale: The angle cock is a valve located at the ends of cars that opens and closes
the brake pipe. It is used to connect or disconnect the brake pipe between cars.
5. What is the "dead man's pedal" or "alerter" on a locomotive?
A) A safety device that requires the engineer to acknowledge an alarm
B) A device that controls the throttle
C) A device that controls the brakes
D) A device that controls the horn
Correct Answer: A
Rationale: The alerter (also known as the "dead man's pedal") is a safety device that
requires the engineer to acknowledge an alarm at regular intervals. If not acknowledged,
the train will stop.
6. What is the FRA requirement for air brake tests?
A) A test must be performed at the beginning of each trip
B) A test must be performed every 24 hours
C) A test must be performed every 8 hours
D) A test must be performed at the end of each trip
Correct Answer: A
Rationale: FRA regulations require that an air brake test be performed at the beginning
of each trip. This includes a brake pipe leakage test and a functional brake test.
7. What is the maximum allowed brake pipe leakage per minute?
A) 1 psi per minute
B) 2 psi per minute
, C) 5 psi per minute
D) 10 psi per minute
Correct Answer: C
Rationale: The maximum allowed brake pipe leakage is 5 psi per minute. Leakage
greater than this indicates a problem with the air brake system.
8. What is the purpose of the "Independent Brake" on a locomotive?
A) To apply brakes to the locomotive only
B) To apply brakes to the train cars only
C) To apply brakes to the entire train
D) To release brakes from the entire train
Correct Answer: A
Rationale: The independent brake applies brakes to the locomotive only. It is used for
controlling the locomotive independently of the train brakes.
9. What is the purpose of the "Automatic Brake" on a locomotive?
A) To apply brakes to the locomotive only
B) To apply brakes to the train cars only
C) To apply brakes to the entire train
D) To release brakes from the entire train
Correct Answer: C
Rationale: The automatic brake applies brakes to the entire train. It is used for slowing
and stopping the train.
10. What is the "brake pipe" on a train?
A) The air line that runs the length of the train
B) The air line that supplies air to the horn
C) The air line that supplies air to the cab
D) The air line that supplies air to the engine
Correct Answer: A
Rationale: The brake pipe is the air line that runs the length of the train and carries the
air pressure that controls the brakes.
11. What is the "auxiliary reservoir" on a train car?
