LIRR Definitions fully solved rated A+ 2024/2025

LIRR DefinitionsBLOCK - correct answer A length of track of defined limits, the use of which is governed by block signals, block-limit signals, automatic speed control or any combination thereof. ABSOLUTE BLOCK - correct answer A block established between block stations, block limit stations, interlockings or any combination thereof which must not be occupied by more than one train except as provided by the rules. AUTOMATIC BLOCK SIGNAL SYSTEM - correct answer A block signal system wherein the use of each block is governed by an automatic block signal, the cab signal indicator or both. BLOCK SIGNAL SYSTEM - correct answer A series of consecutive blocks. MANUAL BLOCK SIGNAL SYSTEM - correct answer A block signal system wherein the use of each block is governed by block signals controlled manually, by block-limit signals or both, upon information received by telephone, radio or other means of communication. AUTOMATIC SPEED CONTROL SYSTEM - correct answer A system so arranged that its operation will automatically result in the following: A full service application of the train brakes if, while operating under a speed restriction, the speed of the train exceeds the predetermined rate. The application will continue until the train is either brought to a stop or, under the control of the engineer, its speed is reduced to the predetermined rate. SPEED CONTROLLED TRAIN - correct answer A train equipped with the following speed control apparatus, a cab signal indicator, sealed application valve or switch, audible warning device and acknowledging switch, in operative condition for the direction in which it is to move. ENGINE - correct answer A unit propelled by any form of energy or a combination of units operated from a single control, used in road or yard service.