UNION PACIFIC CONDUCTOR EXAM SCRIPT 2026 QUESTIONS AND ANSWERS GRADED A+

UNION PACIFIC CONDUCTOR EXAM
SCRIPT 2026 QUESTIONS AND ANSWERS
GRADED A+

●● Relay stop pins.
Answer: Are made of brass provide a air gap ensuring positive drop
away


●● The main function of a track circuit is.
Answer: To detect the presence of a train


●● 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


●● 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