Electrical Block Instruments - Overview
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Questions and Answers

What type of instrument is represented by the handle type in tokenless instruments?

  • Neale’s Token Instrument (Old type)
  • Tablet Instrument
  • Neale’s Token Instrument (New type)
  • Daido & Kyosan (correct)

    • Which position of the Operating Handle indicates that no Token has been extracted?

  • Token Extraction
  • Sending position TGT
  • Line Closed (correct)
  • Receiving position TCF

    • Which component of Neale's Token Instrument (Old type) is responsible for indicating current flow?

  • Operating Handle
  • Token Delivery Aperture
  • Lock on Drawer
  • Current Indicator (Galvanometer) (correct)

    • What does the Receiving position (TCF) of the Operating Handle indicate?

    <p>Line clear has been given for a train to approach</p> Signup and view all the answers

    What function does the Mechanical Key Lock serve in Neale's Token Instrument?

    <p>To secure the Drawer</p> Signup and view all the answers

    Which statement about the Operating Handle is correct?

    <p>It is controlled by the Station Master at the other end</p> Signup and view all the answers

    Which of the following is NOT a type of Electrical Block Instrument mentioned?

    <p>Push Button Instrument</p> Signup and view all the answers

    What is the first action taken by the Station Master with the old type of instrument when signaling a train?

    <p>Restoring the operating Handle to normal</p> Signup and view all the answers

    When using Neale's Token Instrument (New Type), which action is performed last in the signaling process?

    <p>Turning the Operating Handle to 'Line Closed'</p> Signup and view all the answers

    What is required before any operation on Token or Block Instruments in Neale's new signaling method?

    <p>Verification of station identity through telephone communication</p> Signup and view all the answers

    What distinguishes Neale’s tablet instrument from Neale’s token instrument?

    <p>The type of token used, a flat tablet instead of a ball</p> Signup and view all the answers

    In the signaling process between Block stations, what must be done to acknowledge the 'Train out of Section' signal?

    <p>The Operating Handle must be turned to 'Line Closed' on the last beat of the signal</p> Signup and view all the answers

    What is the primary function of the Bell Plunger?

    <p>To ring the bell of the Block Instrument for signaling trains.</p> Signup and view all the answers

    What does the Galvanometer indicate?

    <p>The operation of the Block Instrument and the passage of electrical current.</p> Signup and view all the answers

    What feature allows the Station Master to ensure that only the correct Token is inserted into the Drawer?

    <p>The Lock on Drawer.</p> Signup and view all the answers

    How does the Mechanical Key Lock work in relation to the Token Instrument?

    <p>It locks the operating Handle after a Token is removed.</p> Signup and view all the answers

    What is the purpose of the Token Delivery Aperture?

    <p>To facilitate the retrieval of Tokens.</p> Signup and view all the answers

    What action is taken by the operator upon the arrival of the train?

    <p>Places the Token in the instrument.</p> Signup and view all the answers

    What indicates that there is at least one Token in the instrument?

    <p>A green disc with a white cross.</p> Signup and view all the answers

    What characteristic do the Tokens used in the instrument have?

    <p>Tokens have distinctive grooves that differ for adjoining Block sections.</p> Signup and view all the answers

    What does the Glass Window provide for the Station Master?

    <p>An observation point for Tokens falling short.</p> Signup and view all the answers

    Which position can the Operating Handle NOT be moved to when there is no Token in the instrument?

    <p>Line Closed.</p> Signup and view all the answers

    What does the shutter of the instrument display if it is empty?

    <p>A red disc with the word 'Empty'.</p> Signup and view all the answers

    Which component is primarily used for locking the Drawer?

    <p>The Mechanical Key Lock.</p> Signup and view all the answers

    What is a feature of the Tokens used in the instrument?

    <p>They bear engraved initials of the two stations at each end of the Block section.</p> Signup and view all the answers

    Which option correctly describes the design change in Neale's Token Instrument?

    <p>It has four circular glass windows for observing Tokens.</p> Signup and view all the answers

    What action should be taken after sending the 'Train out of Section' signal to X?

    <p>Press the bell plunger for five counts.</p> Signup and view all the answers

    What shape of holes are used for the Tokens in the Neale's Token Instrument?

    <p>Different shapes.</p> Signup and view all the answers

    What must the operator do after turning the Operating Handle to the 'Line Closed' position?

    <p>Acknowledge the 'Train entering Section' signal.</p> Signup and view all the answers

    What immediate signal follows the acknowledgment of the 'Train entering Section' signal?

    <p>Send 'Attention' signal to X.</p> Signup and view all the answers

    What is the first action taken by Station X in the procedure for signalling the train to Station Y?

    <p>Sends 'Attention' signal to Y</p> Signup and view all the answers

    What does Station X do after sending the 'Attention' signal to Station Y?

    <p>Acknowledges 'Attention' signal from Y</p> Signup and view all the answers

    What must Station Y do when it receives the 'Is Line Clear' signal from Station X?

    <p>Acknowledge the signal while keeping the Bell Plunger pressed</p> Signup and view all the answers

    What does the 'Attention' signal indicate when sent from Station X to Station Y?

    <p>An assertion of secure communication</p> Signup and view all the answers

    What happens after Station Y acknowledges the 'Is Line Clear' signal?

    <p>Station Y sends an 'Attention' signal to X</p> Signup and view all the answers

    When does Station X turn its operating handle to 'Receiving' position?

    <p>On the last beat of 'Is Line Clear' signal</p> Signup and view all the answers

    What is the last action taken by Station Y in the sequence?

    <p>Acknowledge 'Attention' signal from X</p> Signup and view all the answers

    Why must the names of the working stations be exchanged over the telephone?

    <p>To confirm that both stations are prepared for communication</p> Signup and view all the answers

    During which step does Station X release the Token from its instrument?

    <p>Upon turning the handle to the 'Sending' position</p> Signup and view all the answers

    What is the function of the Bell Plunger during the signaling process?

    <p>To confirm the acknowledgment of signals</p> Signup and view all the answers

    What is the last action performed by Station Y after sending the acknowledgment of the 'Train out of Section' signal?

    <p>Turns the Operating Handle to 'Line Closed'</p> Signup and view all the answers

    Which of the following correctly describes the initial communication step between Block stations before signaling a train?

    <p>Confirming the names of the stations working together</p> Signup and view all the answers

    What distinguishes the method of signaling in Neale's Token Instrument (New Type) from the Old Type during the 'Train out of Section' procedure?

    <p>The order of restoring the Operating Handle to normal</p> Signup and view all the answers

    In the signaling process, what must Station Y do as part of acknowledging the 'Train out of Section' signal after it has been received?

    <p>Press the Bell Plunger for a predetermined count</p> Signup and view all the answers

    What is a notable difference between Neale’s tablet instrument and Neale’s token instrument?

    <p>The shape of the token used in the instrument</p> Signup and view all the answers

    Which component of Neale's Token Instrument (Old type) serves to inform the operator about the availability of tokens?

    <p>Glass Window</p> Signup and view all the answers

    What is the function of the Operating Handle's 'Sending position (TGT)' in the signaling process?

    <p>Indicates the train is about to depart</p> Signup and view all the answers

    Why is the Operating Handle of Neale's Token Instrument not operable without permission?

    <p>To maintain electrical control protocols</p> Signup and view all the answers

    Which feature of the Neale's Token Instrument primarily prevents the instrument from being misused?

    <p>Mechanical Key Lock</p> Signup and view all the answers

    What must occur after the Operating Handle is turned to 'Line Closed' position in Neale's Token Instrument?

    <p>Acknowledgment of train arrival is required</p> Signup and view all the answers

    What does the term 'Block Section' refer to in the context of the instrument's operation?

    <p>A segment of railway line governed by signals</p> Signup and view all the answers

    Which of the following describes the significance of the Current Indicator in Neale's Token Instrument?

    <p>Monitors electrical connections for integrity</p> Signup and view all the answers

    What is the primary use of the Bell Plunger within the Block Instrument system?

    <p>To transmit the prescribed Bell signals.</p> Signup and view all the answers

    What component in the Block Instrument displays the passage of an electrical current?

    <p>Galvanometer</p> Signup and view all the answers

    Which feature of the Token Instrument ensures that only the correct Token can be utilized?

    <p>Drawer design</p> Signup and view all the answers

    In a Token Instrument, what occurs when the Mechanical Key Lock has been engaged?

    <p>The Operating Handle is locked in sending position.</p> Signup and view all the answers

    What does the distinctive pattern of grooves on Tokens provide in the signaling system?

    <p>Differentiation between Block sections.</p> Signup and view all the answers

    What does the Glass Window in the Token Instrument allow the Station Master to observe?

    <p>Whether tokens are falling short.</p> Signup and view all the answers

    How does the Token Delivery Aperture function in the Token Instrument?

    <p>It allows manual retrieval of Tokens.</p> Signup and view all the answers

    Which action is tied to the operation of the corresponding Block Instrument at the other end of the section?

    <p>Depressing the Bell Plunger.</p> Signup and view all the answers

    What is indicated by the distinct engraved numbers on each Token?

    <p>The identification of the Block section.</p> Signup and view all the answers

    What action is taken immediately after a train signals its arrival at a station using Neale's Token Instrument?

    <p>Acknowledge 'Train entering Section' signal.</p> Signup and view all the answers

    What does the presence of a green disc with a white cross on the shutter indicate?

    <p>One or more Tokens are present.</p> Signup and view all the answers

    How does the Operating Handle of the Neale's Token Instrument indicate the direction of the Tokens?

    <p>It indicates 'Coming From' and 'Going To'.</p> Signup and view all the answers

    What happens when the Operating Handle is turned to the 'Coming From' position?

    <p>No Tokens can be processed in the instrument.</p> Signup and view all the answers

    What is the primary function of the drum at the top of Neale's Token Instrument?

    <p>To rotate and drop Tokens into the chamber.</p> Signup and view all the answers

    What differentiates the Tokens in the Neale's Token Instrument from those of the old type?

    <p>They feature holes of different shapes.</p> Signup and view all the answers

    What does the red disc with the word 'Empty' signify on the shutter of the instrument?

    <p>There are no Tokens available in the instrument.</p> Signup and view all the answers

    What procedure does an operator follow after sending a 'Train out of Section' signal?

    <p>Wait for an acknowledgment from the next station.</p> Signup and view all the answers

    Which part of Neale's Token Instrument provides visibility of the remaining Tokens?

    <p>The shutter with glass windows.</p> Signup and view all the answers

    What must occur before the Token is placed in the drum of the Neale's Token Instrument?

    <p>The incoming signal must be acknowledged.</p> Signup and view all the answers

    Which step comes immediately after Station Y acknowledges the 'Attention' signal from Station X?

    <p>Station Y attends the telephone.</p> Signup and view all the answers

    What action does Station X need to perform to confirm the train's line status before proceeding?

    <p>Send an 'Is Line Clear' signal to Station Y.</p> Signup and view all the answers

    During the signaling process, what is the purpose of pressing the Bell Plunger for a count of five?

    <p>To acknowledge the signal.</p> Signup and view all the answers

    What sequence of actions does Station X complete before it releases the Token?

    <p>Send 'Attention', ask for Private Numbers, and send 'Is Line Clear'.</p> Signup and view all the answers

    After receiving the 'Is Line Clear' acknowledgment from Station Y, what action does Station X take?

    <p>Release the Token and send 'Attention'.</p> Signup and view all the answers

    What is the first communication that occurs between the two stations before any operations are made?

    <p>Names of the stations are exchanged over the telephone.</p> Signup and view all the answers

    What does Station X do on the final beat of the 'Is Line Clear' signal before turning the Operating Handle?

    <p>Keeps the Bell Plunger pressed in.</p> Signup and view all the answers

    What must Station Y do after receiving the Private Numbers from Station X?

    <p>Send an acknowledgment back to X.</p> Signup and view all the answers

    When does Station Y turn its Operating Handle to 'Receiving'?

    <p>Upon receipt of the last beat from Station X's 'Is Line Clear' signal.</p> Signup and view all the answers

    What action does Station X take after sending the Token and 'Attention' signal upon the train's departure?

    <p>Wait for acknowledgment from Station Y.</p> Signup and view all the answers

    Study Notes

    Electrical Block Instruments

    • Types of instruments used on Eastern Railway for single-line working include: Neale's Token (old/converted), Neale's Token (new), Tablet, and Tokenless (handle type, push button type).
    • Tokenless instruments are detailed in Chapter VIII of BWM.

    Description of Instruments

    • Detailed descriptions and operating instructions are provided for each instrument type.
    • Diagrams accompany the text to aid in understanding.
    • Key elements of the instruments are identified, including those for conveying information on the train's status, like 'Line Closed', "Train Going To," and "Train Coming From."

    Neale's Token Instrument (Old Type)

    • Includes an operating handle.
    • Features a bell plunger, block bell, current indicator (galvanometer), drawer, drawer lock, token delivery aperture, mechanical lock, and a glass window.

    Neale's Token Instrument (Operating Handle)

    • The pointer indicates: Line Closed, Receiving, and Sending positions.
    • Receiving position: Token extracted from the other end of the block section, clear for trains to approach.
    • Sending Position: The line clear has been received, and Token already extracted.

    Neale's Token Instrument (New Type)

    • Has an operating handle, token, drum, small circular windows, green disc, and red disc for indicating token presence.
    • Difference from old type: Station Master giving "Line Clear" for trains to approach has the operating handle back to normal.

    Neale's Tablet Instrument

    • Uses tablets inserted into a flat metal disc instead of a ball token.
    • Tablets are numbered and have code initials of stations.
    • Tablets are issued from a drawer.
    • Includes a small rectangular shutter to show the presence of tablets.

    Maintenance Procedures

    • Maintenance of the instruments is done in the "Line Closed" position.
    • Station Master and signal department staff must sign a register during maintenance.
    • "Line clear" signaling is suspended during maintenance.
    • Normal operations resume after all procedures are complete and the instrument is in perfect working order.

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    Single Line Electrical Block Instruments PDF

    Description

    This quiz covers various electrical block instruments used on the Eastern Railway, focusing on Neale's Token and Tokenless types. Detailed descriptions, operating instructions, and diagrams provide insights into their functionalities. Test your knowledge on the critical elements necessary for train operations and safety.

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