LIRR SIGNALMAN DEFINITIONS EXAM 100% ACCURATE 2025

What is the purpose of a Track circuit? - ANSWERThe purpose of the Track Circuit is to detect the presences of a train and broken rail protection. What the purpose of the Directionals at a crossing? - ANSWERThe purpose of the directional is to lift up the gates behind the train to expedite the traffic flow. What is the purpose of the Approach Stick Circuit? - ANSWERThe purpose of the Approach Stick circuit is to prevent the operator from throwing switches after cancelling the signal with a train on the approach or until he runs time. What is a Stick Relay? - ANSWERA relay that stays picked over its own heel front combination. What is the purpose of the lock rods on a switch? - ANSWERThe prevent the switch from completing its stroke with a 1/4" obstruction or more in the point. What are the 3 main breaks in the Approach Stick circuit in order? - ANSWERThe route check, the RGP, and the 100POB. What does the RGP stand for? - ANSWERRed Signal Repeater. What drops the Lock relay? - ANSWERYour Approach sticks, track circuits over the switches, and route checks. What is the purpose of Automatic Speed Control? - ANSWERASC provides a positive check of the block ahead and controls the train speed limitation thru cab signal indication. Lead Bridge has how many bridge locks? - ANSWER6 - 2 Spanner Locks and 4 Indication locks. The prints for Lead Bridge are drawn to show the bridge in what position and Why? - ANSWERThey are drawn showing the bridge in the UP position because the ships were there before the railroad. What is the difference betwee