UNION PACIFIC CONDUCTOR FINAL
COMPREHENSIVE STUDY GUIDE 2026
FULL QUESTIONS AND SOLUTIONS
GRADED A+
◍ A signal indication is.
Answer: The info conveyed by the signal
◍ Relay stop pins.
Answer: Are made of brass provide a air gap ensuring positive drop away
◍ Track Bulletin.
Answer: A notice of conditions affecting train movement.
◍ The main function of a track circuit is.
Answer: To detect the presence of a train
◍ How are Track Bulletins issued?.
Answer: Track Warrant designed to deliver them.
◍ What are typical resistance values of most track relays used in non coded
track.
Answer: 2ohm/4ohm
◍ If to much current flows through a track relay ______ it will be difficult to
shunt.
Answer: Coils
◍ the type of trouble (a short or an open) on tracte circuits is determined by:.
Answer: taking a current reading at the battery end ot the track circuit
◍ Yellow signal.
Answer: Approach
, ◍ Form A Track Bulletin.
Answer: Used to restrict movement (Speed) because of track conditions or
structures.
◍ Wet track conditions are similar to a _______ which causes load current to
_______.
Answer: Train/increase
◍ Standing at the _______ end of a switch will determine if it's left or right.
Answer: Motor
◍ What is an advantage of coded track circuits over non- coded circuits?.
Answer: Greater shunting sensitivity
◍ The centering device in a swcc __________________ if the connecting rod
breaks or disconnects.
Answer: Causes the contrôler contacts to open and/or shunt the swcc circuits
◍ What rods are power oporated switch to the track.
Answer: Lock rod throw rod point detector rod
◍ When a relay is described as 500ohm reference is being made to the
resistances of the ______.
Answer: Coils
◍ A netural relay is one that.
Answer: Operates regardless of the polarity through its coils
◍ Form B Track Bulletin.
Answer: Used to stop movement of trains into an area where men or
equipment are fouling the track.
◍ Rail and track connections have no required standards.
Answer: False
◍ Form C Track Bulletin.
Answer: Used as somewhat of "catch-all". Used to report certain conditions
of equipment, inform crews of contractors working near the tracks, or for
COMPREHENSIVE STUDY GUIDE 2026
FULL QUESTIONS AND SOLUTIONS
GRADED A+
◍ A signal indication is.
Answer: The info conveyed by the signal
◍ Relay stop pins.
Answer: Are made of brass provide a air gap ensuring positive drop away
◍ Track Bulletin.
Answer: A notice of conditions affecting train movement.
◍ The main function of a track circuit is.
Answer: To detect the presence of a train
◍ How are Track Bulletins issued?.
Answer: Track Warrant designed to deliver them.
◍ What are typical resistance values of most track relays used in non coded
track.
Answer: 2ohm/4ohm
◍ If to much current flows through a track relay ______ it will be difficult to
shunt.
Answer: Coils
◍ the type of trouble (a short or an open) on tracte circuits is determined by:.
Answer: taking a current reading at the battery end ot the track circuit
◍ Yellow signal.
Answer: Approach
, ◍ Form A Track Bulletin.
Answer: Used to restrict movement (Speed) because of track conditions or
structures.
◍ Wet track conditions are similar to a _______ which causes load current to
_______.
Answer: Train/increase
◍ Standing at the _______ end of a switch will determine if it's left or right.
Answer: Motor
◍ What is an advantage of coded track circuits over non- coded circuits?.
Answer: Greater shunting sensitivity
◍ The centering device in a swcc __________________ if the connecting rod
breaks or disconnects.
Answer: Causes the contrôler contacts to open and/or shunt the swcc circuits
◍ What rods are power oporated switch to the track.
Answer: Lock rod throw rod point detector rod
◍ When a relay is described as 500ohm reference is being made to the
resistances of the ______.
Answer: Coils
◍ A netural relay is one that.
Answer: Operates regardless of the polarity through its coils
◍ Form B Track Bulletin.
Answer: Used to stop movement of trains into an area where men or
equipment are fouling the track.
◍ Rail and track connections have no required standards.
Answer: False
◍ Form C Track Bulletin.
Answer: Used as somewhat of "catch-all". Used to report certain conditions
of equipment, inform crews of contractors working near the tracks, or for
