Railway Signal Units
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Questions and Answers

What is the main advantage of LED signals compared to filament lamp signals?

  • Higher luminous intensity
  • Multi-color capability
  • Mechanical switching
  • Longer life (correct)

    • What is the purpose of a main signal?

  • To display advertisements
  • To indicate the location of the next station
  • To provide information about the weather
  • To indicate if the train has to stop or can continue (correct)

    • What is the color of the signal aspect that means 'Caution' in the UIC Code 732?

  • Green
  • White
  • Red
  • Yellow (correct)

    • What is the characteristic of a searchlight signal?

    <p>It uses a single lamp with mechanical apertures</p> Signup and view all the answers

    What is the primary method of operating points and signals in mechanical interlocking?

    <p>Through muscle-power of the local operator</p> Signup and view all the answers

    What is the advantage of using multicolor LED units?

    <p>They eliminate the need for multiple units</p> Signup and view all the answers

    What is the main purpose of Automatic Train Control (ATC)?

    <p>To increase safety, efficiency, and reduce operating costs</p> Signup and view all the answers

    What is the purpose of a lens and filter system in a signal unit?

    <p>To direct the light from multiple lamps to the same exit</p> Signup and view all the answers

    What type of interlocking system uses a free-wired logic and relay circuitry?

    <p>Relay Interlocking System</p> Signup and view all the answers

    What is the historical meaning of a green signal flag or night signal?

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

    What is the primary function of Automatic Train Protection (ATP)?

    <p>To prevent collision of trains</p> Signup and view all the answers

    What is the purpose of white signals in some railways?

    <p>To permit shunting movements</p> Signup and view all the answers

    What is the component of Automatic Train Control responsible for controlling the speed of trains?

    <p>Automatic Train Operation (ATO)</p> Signup and view all the answers

    What is the main weakness in railway safety identified by the text?

    <p>The human being</p> Signup and view all the answers

    What is the purpose of the route control table in tabular interlocking?

    <p>To detail the interlocking conditions relevant for each route</p> Signup and view all the answers

    What is the primary advantage of Automatic Train Control (ATC) over human drivers?

    <p>It is more reliable and reduces errors</p> Signup and view all the answers

    What is the primary purpose of PTC technologies?

    <p>To prevent accidents caused by human error</p> Signup and view all the answers

    What type of information does the PTC system provide to train crew members?

    <p>Up-to-date visual and audible information</p> Signup and view all the answers

    What happens if an engineer does not respond to the PTC warning system?

    <p>Onboard computers activate the brakes and safely stop the train</p> Signup and view all the answers

    What is another term for a level crossing?

    <p>Grade crossing</p> Signup and view all the answers

    Why are level crossings considered hazardous?

    <p>Because of frequent accidents</p> Signup and view all the answers

    What is the purpose of level crossing equipment?

    <p>To improve railway safety</p> Signup and view all the answers

    What is the characteristic of passive level crossings?

    <p>They always appear the same to the road user</p> Signup and view all the answers

    What is the name of the distinctive sign used to indicate the presence of a level crossing to road users?

    <p>St. Andrew's Cross</p> Signup and view all the answers

    What is a scissors crossing also known as?

    <p>Double crossover</p> Signup and view all the answers

    How many blades does a double slip crossing have?

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

    Which track arrangement is used to split one track into three or more parallel tracks?

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

    What type of crossing is used to directly cross two tracks?

    <p>Diamond crossing</p> Signup and view all the answers

    What must diamond crossings have to prevent train collisions?

    <p>Route interlocking</p> Signup and view all the answers

    Which part is NOT a component of double points?

    <p>Eight guard rails</p> Signup and view all the answers

    Which element requires a construction consisting of two sharp and two blunt frogs?

    <p>Diamond crossing</p> Signup and view all the answers

    What does a slip crossing combine the functions of?

    <p>Diamond crossing and points</p> Signup and view all the answers

    What does the Radio Block Centre (RBC) store in ETCS Levels 2 and 3?

    <p>Static line data</p> Signup and view all the answers

    How is train control data transmitted in ETCS Level 2?

    <p>By digital radio</p> Signup and view all the answers

    What is the primary function of balises in ETCS Level 2?

    <p>Train positioning</p> Signup and view all the answers

    What additional system is adopted in ETCS Level 3 to ensure train completeness?

    <p>Train-borne checking of train integrity</p> Signup and view all the answers

    What technology is used by ETCS to communicate with trains?

    <p>Euroradio based on GSM-R</p> Signup and view all the answers

    What does the Movement Authority (MA) permit?

    <p>A train to pass a section of track with a defined length</p> Signup and view all the answers

    Which system is still used for positive train separation in ETCS Level 2?

    <p>Fixed block sections with traditional track clear detection</p> Signup and view all the answers

    How often do trains transmit location data in ETCS Level 2?

    <p>At specified intervals</p> Signup and view all the answers

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