Exam (elaborations)
LIRR Definitions Questions with Solutions 2024
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Exam of 6 pages for the course LIRR at LIRR (LIRR Definitions)
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LIRR DefinitionsWORKING LIMITS - answer A segment of track with definite boundaries upon which
trains may move only as authorized by the roadway worker in charge of that segment of
track.
AUTOMATIC SPEED CONTROL SYSTEM - answerA 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.
PILOT - answerAn employee assigned to a train or track car when the engineer,
conductor or track car driver is not qualified on the physical characteristics or rules of
the railroad or portion of the railroad over which the movement is to be made.
SPEED CONTROLLED TRAIN - answerA train equipped with the following speed
control apparatus: 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.
ABSOLUTE BLOCK - answerA 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 - answerA block signal system wherein the use
of each block is governed by an automatic block signal, the cab signal indicator or both.
ENGINE - answerA unit propelled by any form of energy or a combination of units
operated from a single control, used in road or yard service.
INTERLOCKING - answerAn arrangement of signals and signal appliances so
interconnected that their movements must succeed each other in proper sequence and
for which interlocking rules are in effect.
MULTIPLE UNIT EQUIPMENT - answerEquipment capable of being propelled by
electrical energy through the use of the third rail contact shoes.
STATION - answerA place designated by name on the station pages of the current
timetable.
, INTERLOCKING SWITCH - answerA switch within interlocking limits controlled by the
Block Operator or Train Dispatcher working in conjunction with interlocking signals and
other interlocking appliances.
BLOCK-LIMIT STATION - answerA place at which a block-limit signal is displayed.
AUTOMATIC SAFETY SWITCH - answerA switch identified by a yellow switch stand.
Trains may make trailing point moves through the switch without previously aligning it
by hand. Except as specified by Timetable Special Instruction.
MANUAL BLOCK SIGNAL SYSTEM - answerA 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.
INTERLOCKING LIMITS - answerThe tracks between the extreme opposing home
signals of an interlocking.
ASPECT - answerThe appearance of a fixed signal which conveys an indication as
viewed from the direction of an approaching train; the appearance of a cab signal
indicator as viewed in the engine control compartment.
BLOCK-LIMIT SIGNAL - answerA fixed signal indicating the limit of the block, the use of
which is governed by manual block signal system rules.
FIXED SIGNAL - answerA signal of a fixed location indicating a condition which affects
the movement of a train.
CAB SIGNAL INDICATOR - answerA signal indicator located in the engine control
compartment displaying the maximum speed for the movement of the train. It will be
used in conjunction with interlocking signals and either in conjunction with or in lieu of
block signals.
MARKER - answerA highly visible marking device in the red-orange-amber color range,
affixed to the rear of a train to indicate that the train is complete.
MAXIMUM AUTHORIZED SPEED - answerThe highest speed that is permitted over a
specific portion of the railroad. It may be authorized by the special instructions of the
current timetable, Rules of the Operating Department or any other publication
authorized by the General Superintendent- Transportation.
BLOCK SIGNAL - answerA fixed signal or hand signal in the absence of a fixed signal,
at the entrance of a block to govern trains using that block.
INDICATION - answerThe information conveyed by the aspect of a signal.
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