Block Instruments and Safety Measures Quiz

Fortnightly.

Locks must be in a condition that they are not liable to be forced.

They should be cleaned with chamois leather and refurbished.

<p>They must be free and return to their normal position when no current is flowing.</p> Signup and view all the answers

<p>All must be kept tight and split pins opened.</p> Signup and view all the answers

<p>Batteries should be kept clean, with tight terminals free from dirt or corrosion.</p> Signup and view all the answers

<p>They must be in good condition with no direct path for current flow between circuits.</p> Signup and view all the answers

<p>Both instruments and their associated equipment shall be maintained by one agency.</p> Signup and view all the answers

<p>The isolated power supply is designated solely for the block instrument to ensure proper operation without interference from other circuits.</p> Signup and view all the answers

<p>The instruments must clearly show 'Line Closed' when normal and no train is present, 'Train Coming From' when line clear is given, and 'Train Going To' when line clear is received.</p> Signup and view all the answers

<p>Isolated DC-DC converter modules must be utilized for each block separately when using IPS for block working.</p> Signup and view all the answers

<p>The current indicator shows the polarity of incoming and outgoing line currents.</p> Signup and view all the answers

<p>The Station Master must perform specific actions to grant or obtain Line Clear, ensuring coordinated operation between stations.</p> Signup and view all the answers

<p>If provided in the SM's Room, the power supply housing should be locked and sealed.</p> Signup and view all the answers

<p>The hot standby feature allows for continuous display and operation of block indications on both VDUs for reliability.</p> Signup and view all the answers

<p>Cooperation is necessary for operations, such as granting Line Clear for token release or acquisition.</p> Signup and view all the answers

<p>Both instruments must be restored to normal, in accordance with the cooperative features indicated in para 18.1.2(c).</p> Signup and view all the answers

<p>It is to prevent any conflicting signals that could endanger train movements.</p> Signup and view all the answers

<p>The instrument set to 'Train Going To' must be the first one restored to 'Line Closed'.</p> Signup and view all the answers

<p>A token can only be extracted when the instrument is set to 'Train Going To'.</p> Signup and view all the answers

<p>The instrument is installed to prevent a token from one block section being placed in an adjacent section.</p> Signup and view all the answers

<p>Tokens must be engraved with the code name of the stations at both ends and a serial number.</p> Signup and view all the answers

<p>They operate on a coded impulse/frequency modulated current system, making them immune to extraneous currents.</p> Signup and view all the answers

<p>They must provide means to indicate 'Train on Line' at both sending and receiving stations.</p> Signup and view all the answers

<p>To dispense with the need for manual operation.</p> Signup and view all the answers

<p>The mechanism for receiving and the mechanism for granting 'Line Clear'.</p> Signup and view all the answers

<p>When the train enters the block section and when it has passed the Home Signal.</p> Signup and view all the answers

<p>Line Closed, Line Clear, Train On Line.</p> Signup and view all the answers

<p>Perform one or more moving operations on the instrument along with working the bell or plunger.</p> Signup and view all the answers

<p>The warning when the train has passed the Last Stop Signal.</p> Signup and view all the answers

<p>To show the current status of the lines implementing Line Clear conditions.</p> Signup and view all the answers

<p>They must also comply with the same requirements outlined for other Block Instruments.</p> Signup and view all the answers

<p>18-MS1</p> Signup and view all the answers

<p>18-MS4</p> Signup and view all the answers

<p>Grey Enamel</p> Signup and view all the answers

<p>Spirit Polish</p> Signup and view all the answers

<p>18-MS2</p> Signup and view all the answers

<p>18-D1</p> Signup and view all the answers

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

<p>18-MS5</p> Signup and view all the answers

<p>IO-EXBs facilitate the exchange of vital and non-vital signal relay status between two locations.</p> Signup and view all the answers

<p>In quad mode, 3 vital I/Os can be exchanged.</p> Signup and view all the answers

<p>In non-vital mode, 12 I/Os of non-vital information are exchanged.</p> Signup and view all the answers

<p>The IB signal relay status must be repeated from the rear station to the IB location.</p> Signup and view all the answers

<p>'Vital mode' refers to the operational mode where critical information is exchanged via 3 I/Os.</p> Signup and view all the answers

<p>Quad mode generally includes a total of 3 inputs and 3 outputs for vital functions.</p> Signup and view all the answers

<p>'Spare' indicates that those specific functions or connections are not in use or reserved for future use.</p> Signup and view all the answers

<p>Input and output functions consist of various operational signals necessary for train control and safety.</p> Signup and view all the answers

<p>The maximum output function associated with single mode is 7D HECR-B.</p> Signup and view all the answers

<p>A key feature is the exchange of both vital and non-vital indications to ensure operational efficiency.</p> Signup and view all the answers

<p>The register must include the type of instrument, serial number, location, manufacturer, date of installation, date of last overhaul, and particulars of tokens.</p> Signup and view all the answers

<p>Damaged tokens should be removed, broken up, returned to Stores, and replaced with another token of the same number.</p> Signup and view all the answers

<p>A joint certificate must be issued by the supervisors of the Signal and Telecommunication and Operating Departments confirming the loss of the token.</p> Signup and view all the answers

<p>They must take a census at least once every six months.</p> Signup and view all the answers

<p>Particulars of the lost token must be exhibited conspicuously near the relevant instrument.</p> Signup and view all the answers

<p>All concerned should be informed about the removal and replacement of damaged tokens.</p> Signup and view all the answers

<p>The particulars of lost tokens must be recorded on Card No.S&amp;T/TL, as specified in Annexure: 18-A2.</p> Signup and view all the answers

<p>Tokens that are cracked, deformed, or worn smaller than the normal size must be removed.</p> Signup and view all the answers

<p>Special PVC insulated quads, aluminum sheathed cables, and jelly filled telecommunication cables, as well as OFC and radio.</p> Signup and view all the answers

<p>Universal Fail Safe Block Interface (UFSBI) of approved design.</p> Signup and view all the answers

<p>Block filter, block bell, and telephone must be inserted in the cable pairs connecting them.</p> Signup and view all the answers

<p>Two chokes in series with a four terminal condenser and a surge arrestor across the condenser.</p> Signup and view all the answers

<p>A separate line battery or DC-DC converter dedicated solely to block instruments.</p> Signup and view all the answers

<p>Separate earths for SPD and Block, with a common ring earth for SPDs of all Block equipment.</p> Signup and view all the answers

<p>To ensure that any new instruments meet safety and operational standards set by the Railway Board.</p> Signup and view all the answers

<p>The Block Bell is operated through equipment of approved type to signal communication between stations.</p> Signup and view all the answers

<p>To increase section capacity by dividing a long block section into a rear and advance section.</p> Signup and view all the answers

<p>It is controlled by the Last Stop Signal (LSS) of the rear station.</p> Signup and view all the answers

<p>They monitor the track sections in both the rear and advance sections.</p> Signup and view all the answers

<p>A Signal Post Telephone (SPT) or an approved type of communication device.</p> Signup and view all the answers

<p>Local conditions such as gradients, visibility of signals, and presence of neutral sections.</p> Signup and view all the answers

<p>It ends at the home signal of the advance station, including the block overlap.</p> Signup and view all the answers

<p>It must adhere to the maintenance schedule provided by the OEM's maintenance manual.</p> Signup and view all the answers

<p>It starts from the LSS of the rear station.</p> Signup and view all the answers

<p>Line Closed, Line Clear, Train On Line.</p> Signup and view all the answers

<p>The Station Master must execute one or more definite moving operations on the instrument.</p> Signup and view all the answers

<p>An audible indicator to warn the receiving station.</p> Signup and view all the answers

<p>This prevents conflicting signals which could lead to accidents or unsafe train movements.</p> Signup and view all the answers

<p>They show both the current indicators and the operational conditions of the lines.</p> Signup and view all the answers

<p>A shunting key suitably interlocked with the Block instrument.</p> Signup and view all the answers

<p>They ensure timely alerting of train movements and conditions to prevent accidents.</p> Signup and view all the answers

<p>Non-cooperative instruments must meet similar requirements but may include additional features.</p> Signup and view all the answers

<p>Implementing dual detection with staggering of coils is suggested to prevent unintended counts.</p> Signup and view all the answers

<p>The Main evaluator (EV(M)) is connected to the main DPs, while the Redundant evaluator (EV(R)) is connected to the redundant DPs.</p> Signup and view all the answers

<p>Surge protection devices protect the Advanced Evaluation Board from voltage spikes that could damage the equipment.</p> Signup and view all the answers

<p>Two separate ethernet switches are provided for shared communication among the MSDACs.</p> Signup and view all the answers

<p>The hot link feature permits uninterrupted track detection by allowing another board to take over without delay.</p> Signup and view all the answers

<p>The dual termination boxes enhance protection against environmental factors and improve reliability in data transmission.</p> Signup and view all the answers

<p>The quadded cable provides duplicated paths for signaling, ensuring communication continues if one path fails.</p> Signup and view all the answers

<p>The evaluators connect to a common network via ethernet ports and dedicated OFC, allowing for reliable data sharing.</p> Signup and view all the answers

<p>To prevent failure in detection by providing redundancy for equipment and communication.</p> Signup and view all the answers

<p>The DN-SPT is used for the second level of reset for the AS, IB, and BPAC sections.</p> Signup and view all the answers

<p>It can cause axle counters to miscount due to wheels jumping over the coil.</p> Signup and view all the answers

<p>It starts from the foot of the IB home signal and extends to 400 meters ahead.</p> Signup and view all the answers

<p>Both systems may enter a hang state requiring rebooting during long or to-and-fro movements.</p> Signup and view all the answers

<p>It ensures block overlap by extending from the foot of the IB home signal to 180 meters ahead.</p> Signup and view all the answers

<p>It increases the probability of the wheel jumping over the coil, leading to miscounts.</p> Signup and view all the answers

<p>Dual detection offers increased reliability and reduces the risk of miscount due to environmental factors.</p> Signup and view all the answers