❖ Union Pacific Railroad Conductor Exam Updated 2026 | 250+
Practice Questions & Verified Answers | Comprehensive Study
Guide, Exam Prep Test Bank, Railroad Operating Rules, Train
Handling, Air Brake Systems, Signal Recognition, Switching
Operations, FRA Safety Regulations, Hazardous Materials, Crew
Resource Management, Railroad Communications, Mechanical
Fundamentals, Detailed Rationales, Hiring & Certification
Success
Question 1: When a train encounters a yellow-red flag and no track bulletin
Form B is specified for that location, how must the train proceed?
A. Proceed at maximum authorized speed until the next signal is observed.
B. Stop immediately and contact the train dispatcher for instructions.
C. Be prepared to stop short of a red flag 2 miles beyond the yellow-red flag. If no red
flag is displayed, proceed at restricted speed.
D. Reduce speed to 20 MPH and continue until the end of the subdivision.
CORRECT ANSWER: C. Be prepared to stop short of a red flag 2 miles beyond
the yellow-red flag. If no red flag is displayed, proceed at restricted speed.
Rationale:A yellow-red flag indicates that a red flag is displayed two miles ahead. The
train must be prepared to stop before that red flag. If no red flag is found after two miles,
the train must then proceed at restricted speed as a precaution .
Question 2: Under Union Pacific operating rules, what is the standard brake
pipe pressure for a freight train?
A. 60 psi
B. 75 psi
C. 90 psi
D. 110 psi
CORRECT ANSWER: C. 90 psi
Rationale:The standard brake pipe pressure on the Union Pacific Railroad is 90 psi.
This is the baseline pressure used for air brake tests and train handling calculations to
ensure adequate braking force throughout the train .
Question 3: According to GCOR, what does the term "signal aspect" refer to?
A. The operational meaning of a signal.
B. The physical appearance or configuration of a signal's lights or markers.
C. The specific rule number governing a signal's use.
D. The speed limit associated with a signal.
CORRECT ANSWER: B. The physical appearance or configuration of a signal's
lights or markers.
Rationale:The "signal aspect" is defined as the visual appearance of a fixed or cab
signal, such as the color, position, or flashing pattern of the lights. The "signal indication"
is the meaning conveyed by that aspect, which dictates how the train must proceed .
,Question 4: When working on a yard job, what must a crew do before entering
the main track to switch at an industry?
A. Send a flagman ahead not less than one mile.
B. Obtain a track warrant or contact the yardmaster/dispatcher to check for track
bulletins.
C. Proceed at restricted speed without any further authority.
D. Ensure the train is fully stopped and radio for a track permit.
CORRECT ANSWER: B. Obtain a track warrant or contact the
yardmaster/dispatcher to check for track bulletins.
Rationale:Before fouling or occupying the main track, employees must have authority.
This is usually obtained via a track warrant or by contacting the train dispatcher or
yardmaster to determine if any track bulletins are in effect that could affect the
movement .
Question 5: When performing an Initial Terminal Air Brake Test (Class I), what
is the required air pressure that must be observed at the rear of the train?
A. Exactly 90 psi.
B. Not less than 75 psi.
C. Not more than 60 psi.
D. Within 5 psi of the locomotive brake pipe pressure.
CORRECT ANSWER: B. Not less than 75 psi.
Rationale:When conducting a Class I air brake test at an initial terminal, the air
pressure at the rear of the train must be confirmed to be not less than 75 psi before the
test can begin. This ensures the brake pipe is fully charged and the system is functional .
Question 6: If no air pressure reaches the rear of the train during an Initial
Terminal Air Brake Test, what should the crew check first?
A. The locomotive's main reservoir pressure.
B. That air hoses are coupled and angle cocks are positioned correctly.
C. The condition of the End-of-Train (EOT) device battery.
D. The conductor's report form for previous test results.
CORRECT ANSWER: B. That air hoses are coupled and angle cocks are
positioned correctly.
Rationale:A lack of pressure at the rear of the train is most commonly caused by a
closed angle cock or an uncoupled air hose between cars. The crew must check that all
hoses are properly coupled and all angle cocks are in the open position (handle in line
with the hose) .
Question 7: Which Federal Regulation governs the "Control of Alcohol and
Drug Use" for railroad employees?
, A. 49 CFR Part 227
B. 49 CFR Part 219
C. 49 CFR Part 240
D. 49 CFR Part 261
CORRECT ANSWER: B. 49 CFR Part 219
Rationale:49 CFR Part 219 establishes the federal regulations for the "Control of
Alcohol and Drug Use" for railroad employees. It sets the standards for prohibited
conduct, testing procedures, and the requirements for post-accident testing .
Question 8: When mounting or dismounting moving equipment, what does the
rule of "3-point contact" require?
A. Two hands and one foot making contact with a stable surface.
B. Three hands holding onto the handrails.
C. One hand, one foot, and one knee on the equipment.
D. Maintaining contact with the ground at all times.
CORRECT ANSWER: A. Two hands and one foot making contact with a stable
surface.
Rationale:The rule of "3-point contact" is a fundamental safety practice to prevent falls.
It requires the employee to maintain three points of contact (two hands and one foot, or
two feet and one hand) with the equipment or ladder at all times when climbing up or
down .
Question 9: Within yard limits, what speed must a train maintain unless
otherwise authorized?
A. 30 MPH
B. 20 MPH
C. 15 MPH
D. Restricted speed (prepared to stop short of train, engine, or obstruction).
CORRECT ANSWER: D. Restricted speed (prepared to stop short of train,
engine, or obstruction).
Rationale:Yard limits require movements to be made at restricted speed unless a higher
speed is specifically authorized. This ensures that the train can stop within half the range
of vision, short of any train, engine, car, or other obstruction on the track .
Question 10: What is the purpose of a 2-way End-of-Train (EOT) telemetry
device?
A. To control the locomotive's horn remotely.
B. To monitor brake pipe pressure and transmit it to the locomotive engineer.
C. To track the train's GPS location for the dispatcher.
D. To provide a rear-end marker light only.
Practice Questions & Verified Answers | Comprehensive Study
Guide, Exam Prep Test Bank, Railroad Operating Rules, Train
Handling, Air Brake Systems, Signal Recognition, Switching
Operations, FRA Safety Regulations, Hazardous Materials, Crew
Resource Management, Railroad Communications, Mechanical
Fundamentals, Detailed Rationales, Hiring & Certification
Success
Question 1: When a train encounters a yellow-red flag and no track bulletin
Form B is specified for that location, how must the train proceed?
A. Proceed at maximum authorized speed until the next signal is observed.
B. Stop immediately and contact the train dispatcher for instructions.
C. Be prepared to stop short of a red flag 2 miles beyond the yellow-red flag. If no red
flag is displayed, proceed at restricted speed.
D. Reduce speed to 20 MPH and continue until the end of the subdivision.
CORRECT ANSWER: C. Be prepared to stop short of a red flag 2 miles beyond
the yellow-red flag. If no red flag is displayed, proceed at restricted speed.
Rationale:A yellow-red flag indicates that a red flag is displayed two miles ahead. The
train must be prepared to stop before that red flag. If no red flag is found after two miles,
the train must then proceed at restricted speed as a precaution .
Question 2: Under Union Pacific operating rules, what is the standard brake
pipe pressure for a freight train?
A. 60 psi
B. 75 psi
C. 90 psi
D. 110 psi
CORRECT ANSWER: C. 90 psi
Rationale:The standard brake pipe pressure on the Union Pacific Railroad is 90 psi.
This is the baseline pressure used for air brake tests and train handling calculations to
ensure adequate braking force throughout the train .
Question 3: According to GCOR, what does the term "signal aspect" refer to?
A. The operational meaning of a signal.
B. The physical appearance or configuration of a signal's lights or markers.
C. The specific rule number governing a signal's use.
D. The speed limit associated with a signal.
CORRECT ANSWER: B. The physical appearance or configuration of a signal's
lights or markers.
Rationale:The "signal aspect" is defined as the visual appearance of a fixed or cab
signal, such as the color, position, or flashing pattern of the lights. The "signal indication"
is the meaning conveyed by that aspect, which dictates how the train must proceed .
,Question 4: When working on a yard job, what must a crew do before entering
the main track to switch at an industry?
A. Send a flagman ahead not less than one mile.
B. Obtain a track warrant or contact the yardmaster/dispatcher to check for track
bulletins.
C. Proceed at restricted speed without any further authority.
D. Ensure the train is fully stopped and radio for a track permit.
CORRECT ANSWER: B. Obtain a track warrant or contact the
yardmaster/dispatcher to check for track bulletins.
Rationale:Before fouling or occupying the main track, employees must have authority.
This is usually obtained via a track warrant or by contacting the train dispatcher or
yardmaster to determine if any track bulletins are in effect that could affect the
movement .
Question 5: When performing an Initial Terminal Air Brake Test (Class I), what
is the required air pressure that must be observed at the rear of the train?
A. Exactly 90 psi.
B. Not less than 75 psi.
C. Not more than 60 psi.
D. Within 5 psi of the locomotive brake pipe pressure.
CORRECT ANSWER: B. Not less than 75 psi.
Rationale:When conducting a Class I air brake test at an initial terminal, the air
pressure at the rear of the train must be confirmed to be not less than 75 psi before the
test can begin. This ensures the brake pipe is fully charged and the system is functional .
Question 6: If no air pressure reaches the rear of the train during an Initial
Terminal Air Brake Test, what should the crew check first?
A. The locomotive's main reservoir pressure.
B. That air hoses are coupled and angle cocks are positioned correctly.
C. The condition of the End-of-Train (EOT) device battery.
D. The conductor's report form for previous test results.
CORRECT ANSWER: B. That air hoses are coupled and angle cocks are
positioned correctly.
Rationale:A lack of pressure at the rear of the train is most commonly caused by a
closed angle cock or an uncoupled air hose between cars. The crew must check that all
hoses are properly coupled and all angle cocks are in the open position (handle in line
with the hose) .
Question 7: Which Federal Regulation governs the "Control of Alcohol and
Drug Use" for railroad employees?
, A. 49 CFR Part 227
B. 49 CFR Part 219
C. 49 CFR Part 240
D. 49 CFR Part 261
CORRECT ANSWER: B. 49 CFR Part 219
Rationale:49 CFR Part 219 establishes the federal regulations for the "Control of
Alcohol and Drug Use" for railroad employees. It sets the standards for prohibited
conduct, testing procedures, and the requirements for post-accident testing .
Question 8: When mounting or dismounting moving equipment, what does the
rule of "3-point contact" require?
A. Two hands and one foot making contact with a stable surface.
B. Three hands holding onto the handrails.
C. One hand, one foot, and one knee on the equipment.
D. Maintaining contact with the ground at all times.
CORRECT ANSWER: A. Two hands and one foot making contact with a stable
surface.
Rationale:The rule of "3-point contact" is a fundamental safety practice to prevent falls.
It requires the employee to maintain three points of contact (two hands and one foot, or
two feet and one hand) with the equipment or ladder at all times when climbing up or
down .
Question 9: Within yard limits, what speed must a train maintain unless
otherwise authorized?
A. 30 MPH
B. 20 MPH
C. 15 MPH
D. Restricted speed (prepared to stop short of train, engine, or obstruction).
CORRECT ANSWER: D. Restricted speed (prepared to stop short of train,
engine, or obstruction).
Rationale:Yard limits require movements to be made at restricted speed unless a higher
speed is specifically authorized. This ensures that the train can stop within half the range
of vision, short of any train, engine, car, or other obstruction on the track .
Question 10: What is the purpose of a 2-way End-of-Train (EOT) telemetry
device?
A. To control the locomotive's horn remotely.
B. To monitor brake pipe pressure and transmit it to the locomotive engineer.
C. To track the train's GPS location for the dispatcher.
D. To provide a rear-end marker light only.
