Block Instruments: General Requirements Quiz

<p>Lightning dischargers must be installed on both wires if a return line wire is used. (A)</p> Signup and view all the answers

<p>There should be no openings allowing unauthorized operation. (B)</p> Signup and view all the answers

<p>A double lock with shared key custody. (B)</p> Signup and view all the answers

<p>Within the instrument or in an inaccessible location. (D)</p> Signup and view all the answers

<p>It enables the exchange of bell codes. (B)</p> Signup and view all the answers

<p>Isolated DC-DC Converter (A)</p> Signup and view all the answers

<p>Line Closed (A)</p> Signup and view all the answers

<p>Train Coming From (C)</p> Signup and view all the answers

<p>Block Indication display with hot standby (A)</p> Signup and view all the answers

<p>Complete multiple moving operations on the instrument (C)</p> Signup and view all the answers

<p>To indicate incoming and outgoing line currents (D)</p> Signup and view all the answers

<p>It should accommodate multiple circuit connections (D)</p> Signup and view all the answers

<p>Cooperation of the Station Master at the other end (A)</p> Signup and view all the answers

<p>The cooperative features must be engaged as per para 18.1.2(c). (C)</p> Signup and view all the answers

<p>Only one of the mechanisms can be in operation at a time. (A)</p> Signup and view all the answers

<p>Restore 'Line Closed' to the last operated instrument. (D)</p> Signup and view all the answers

<p>Only when it's set to 'Train Going To'. (D)</p> Signup and view all the answers

<p>Tokens should not be allowed in adjacent section instruments. (A)</p> Signup and view all the answers

<p>Indication of 'Train on Line' when a train enters the block section. (D)</p> Signup and view all the answers

<p>They are immune through coded impulse systems. (C)</p> Signup and view all the answers

<p>Engraved code names of stations and a serial number. (B)</p> Signup and view all the answers

<p>It can replace the manual closing of the Block section. (A)</p> Signup and view all the answers

<p>Train Approaching (C)</p> Signup and view all the answers

<p>The Station Master must perform definite moving operations. (C)</p> Signup and view all the answers

<p>To indicate when the train enters the block section at the sending station. (C)</p> Signup and view all the answers

<p>It serves as authority for shunting behind the Last Stop Signal. (C)</p> Signup and view all the answers

<p>Perform one or more definite operations on the instrument (C)</p> Signup and view all the answers

<p>Automatic setting of the instruments when a train enters the block section (D)</p> Signup and view all the answers

<p>No further operation to 'Train Going To' or 'Train Coming From' can occur until restored (B)</p> Signup and view all the answers

<p>A button in addition to the bell button must be operated (B)</p> Signup and view all the answers

<p>Until the train has completely cleared the block section (B)</p> Signup and view all the answers

<p>Cooperative features must be activated as outlined (C)</p> Signup and view all the answers

<p>It operates alongside other definite movements on the instrument (B)</p> Signup and view all the answers

<p>To prevent operations until the instruments are set to normal (C)</p> Signup and view all the answers

Block instruments must be built strong and be of an approved design.

Block instruments need special protection when near power lines to prevent damage from induced AC voltage.

Block instruments can operate on physical conductors or radio/optical fibers, with extra security features for fiber use.

All block instruments require a lightning discharger, with additional requirements if the system uses a return line wire.

Instruments must have features to stop unauthorized adjustments or manipulations during any user absence.

Locking and sealing mechanisms are required to secure block instruments, with access restricted using double locks.

Telephone instruments must be connected with block instruments using isolation methods, with components inside the instrument to prevent external interference.

Block instruments should have a button for signaling and exchanging codes between different stations.

A separate power supply (battery or DC-DC converter) for each block instrument, preventing power issues from impacting other systems. It only powers that specific instrument. This is crucial for reliability.

Block instruments that use physical conductors (wires) should use metal return paths for the signal current. This guarantees proper signal flow, enabling reliable operation.

Block working built into electronic interlocking systems. Visual displays of block status are available on workstations used by the Assistant Station Master.

The block status is displayed on the workstation, even when the main workstation is not available. This ensures continuous monitoring.

The instruments should have visible lights that clearly show the train's presence or absence and line status, e.g., "Line Closed" or "Train Coming From".

An instrument should show the direction of current flowing in the line (incoming or outgoing).

Getting permission from another station for a train to move requires action by both stations. There are steps the master at each station have to take on the equipment.

Instruments with fixed indications, current direction indicators and detailed interaction procedures for operating these instruments and granting line clears to each other.

Block instruments automatically switch to "Train on Line" when a train enters a block section. They stay in this state until the train leaves the section.

Block instruments are manually set to "Train Going To" or "Train Coming From" by the Station Master. They require a specific operation to change.

Both block instruments are set to "Line Closed" when a section is closed for maintenance. They need cooperation from both Station Masters to return to normal.

Both Station Masters at the ends of a block section must work together to manipulate the block instruments to specific states.

Push-button block instruments use buttons in addition to the bell button for signal operations. This eliminates the need for Station Master co-operation.

The receiving Station Master uses a button to set both block instruments to the "Line Closed" state. This is a unique feature of push-button systems.

Push-button block instruments still automatically display "Train on Line" when a train enters a block section.

The bell plunger is used with both types of instruments. It operates the bell, which provides an audio signal for communication.

The mechanism that allows a 'Line Clear' signal to be sent and received should be designed to prevent both actions from happening simultaneously. This stops accidental train movements.

Block instruments without physical tokens must have audible indicators to alert receiving stations when a train enters a block section at the sending station or when the train passes the home signal at the receiving station.

Double Line Block instruments require separate visual indicators for Up and Down lines to show "Line Closed", "Line Clear", and "Train On Line" statuses.

Station masters must perform specific actions on the instrument before granting a 'Line Clear' signal, such as moving levers or working a bell, to ensure deliberate and intentional actions.

Double Line Block instruments can use audible indicators to warn receiving stations when a train passes the Home Signal and sending stations when a train passes the Last Stop Signal.

Both instruments at the ends of a block section must be returned to 'Line Closed' before any further train movement operations can occur. This prevents conflicting train movements.

Restoring 'Line Closed' requires cooperation between both stations. Neither station can independently return to 'Line Closed' without the other's participation.

The mechanism receiving a 'Line Clear' signal and the mechanism granting a 'Line Clear' signal cannot be active simultaneously. This ensures that only one signal is active at a time.

The instrument set to 'Train Going To' initiates a train movement and must be the first to return to 'Line Closed' after the train arrives at the receiving station.

A token can only be extracted when the instrument is set to 'Train Going To'. Changing the 'Train Going To' condition to 'Line Closed' requires that a token is already inserted in another instrument.

Tokens must be placed in the designated instrument of their respective block sections. They should not be mismatched or placed in the wrong section.

Tokens are engraved with the station names at both ends of the block section and a serial number. This helps identify the token and its intended block.

These instruments use fixed visual indications to show 'Train on Line', 'Line Closed', and other status signals at both sending and receiving stations.