Bogie Mounted Air Brake System Quiz
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Questions and Answers

Which component is identified as having a specific item number 10 associated with it?

  • Guide bush
  • Plunger
  • Piston packing (correct)
  • Cylinder Body

    • How many Tee bolts M12x35 are required according to the inventory?

  • 2
  • 5
  • 3
  • 4 (correct)

    • Which item is associated with the SK-81206 code?

  • Dust excluder
  • Plunger Spring (correct)
  • Piston packing
  • Dome cover

    • What is the purpose of the Jubilee clip size-5 as per the list?

    <p>Securing hoses</p> Signup and view all the answers

    Which item appears to be used for tension control in the assembly?

    <p>Release Spring</p> Signup and view all the answers

    What action must be taken to reset the adjuster?

    <p>Rewind the adjusting tube</p> Signup and view all the answers

    What is the maximum hole tolerance mentioned?

    <p>95 holes</p> Signup and view all the answers

    Why might it be necessary to reset the adjuster?

    <p>After wear and tear affecting performance</p> Signup and view all the answers

    What does the notation '%%p0.5' most likely refer to in this context?

    <p>A pressure rating</p> Signup and view all the answers

    What is indicated by the term 'stroke' in the provided content?

    <p>The linear distance covered by a moving part</p> Signup and view all the answers

    Which of the following is NOT part of the reset process described?

    <p>Measuring hole tolerance</p> Signup and view all the answers

    How is the maximum stroke length described in the content?

    <p>It is 95 max</p> Signup and view all the answers

    What does the 'ADJUSTER IS TO BE RESET BY' indicate?

    <p>A maintenance instruction</p> Signup and view all the answers

    The phrase '95 MAX' in the context most likely refers to:

    <p>The maximum number of holes or limits</p> Signup and view all the answers

    What type of brake system is mentioned in the maintenance manual?

    <p>Bogie Mounted Air Brake System</p> Signup and view all the answers

    Which chapter contains details about the Bogie Mounted Air Brake System?

    <p>Chapter 6</p> Signup and view all the answers

    What is represented by the numbers '58, 37, 38' in the content?

    <p>Component identifiers</p> Signup and view all the answers

    In which section of the manual do you find the maintenance information?

    <p>Maintenance Manual</p> Signup and view all the answers

    What is the purpose of the slack adjuster in the brake system?

    <p>To maintain proper brake clearance</p> Signup and view all the answers

    What does 'R.D.S.O.GROUP' likely refer to in this context?

    <p>Railway Design and Safety Oversight Group</p> Signup and view all the answers

    What type of item is described in the 'ALT.ITEM' line?

    <p>Spare part</p> Signup and view all the answers

    The notation 'CD/24/98' most likely indicates what?

    <p>Component design number and year</p> Signup and view all the answers

    What could 'SKETCH-81200' refer to in the manual?

    <p>A blueprint for the brake system</p> Signup and view all the answers

    What is the significance of the date entry (e.g., '08/98') in the document?

    <p>Release date of the manual</p> Signup and view all the answers

    What is a key feature of the bogie mounted air brake system that distinguishes it from standard systems?

    <p>Removal of external slack adjuster</p> Signup and view all the answers

    What advantage do low friction composite brake blocks provide?

    <p>Higher wear life leading to fewer replacements</p> Signup and view all the answers

    Which of the following is a benefit of using the bogie mounted air brake system?

    <p>Reduction in noise during braking</p> Signup and view all the answers

    How many 8" size cylinders are provided for each coach in the new brake system?

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

    Which material is used in the new brake blocks to provide high friction?

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

    What is one of the main reasons for the redesign of the brake system?

    <p>To eliminate the need for slack adjusters</p> Signup and view all the answers

    What is a characteristic of the pneumatic pipeline layout in the bogie mounted air brake system?

    <p>Flexible hoses for dynamic movement</p> Signup and view all the answers

    What does the brake cylinder pressure depend on?

    <p>The reduction in brake pipe pressure</p> Signup and view all the answers

    What is the weight reduction of the bogie mounted brake system compared to the conventional air brake system?

    <p>492 kg</p> Signup and view all the answers

    What is a primary feature of the bogie mounted brake system?

    <p>It is mounted on the coach</p> Signup and view all the answers

    What aspect should be ensured when fitting the curved profile/pull rods?

    <p>They are fitted according to specific arrangements</p> Signup and view all the answers

    What can be said about the bogie mounted brake system in relation to traditional systems?

    <p>It has become a viable alternative</p> Signup and view all the answers

    Which of the following components is NOT mentioned as part of the bogie mounted brake system?

    <p>Air filters</p> Signup and view all the answers

    How does the bogie mounted brake system affect the number of components?

    <p>It reduces the number of pin joints</p> Signup and view all the answers

    What is a disadvantage of the conventional air brake system when compared to the bogie mounted system?

    <p>Higher complexity</p> Signup and view all the answers

    In the context of the text, what does the term 'viable alternative' refer to?

    <p>An improved design for coaches</p> Signup and view all the answers

    What type of bogies is the WTAC4-3-2-402 designed for?

    <p>16T bogies</p> Signup and view all the answers

    What is the weight reduction achieved by the bogie mounted brake system compared to the conventional air brake system?

    <p>492 kg</p> Signup and view all the answers

    Which component's arrangement must not be reversed during the fitting process of the bogie mounted brake system?

    <p>Curved profile/pull rods</p> Signup and view all the answers

    Which feature characterizes the bogie mounted air brake system in comparison to conventional systems?

    <p>Enhanced pressure dependency on brake pipe pressure</p> Signup and view all the answers

    What is indicated as a key aspect of the maintenance for the bogie mounted brake system?

    <p>Maintenance of minimal pin joints and levers</p> Signup and view all the answers

    In the context provided, which parameter determines the extent of brake cylinder pressure development in the system?

    <p>Extent of reduction in brake pipe pressure</p> Signup and view all the answers

    What is the primary reason for removing the external slack adjuster in the bogie mounted air brake system?

    <p>To eliminate slack adjuster failures</p> Signup and view all the answers

    How many cylinders of 8" size are provided for each coach in the bogie mounted air brake system?

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

    Which of the following is NOT indicated as a benefit of low friction composite brake blocks?

    <p>Increased weight</p> Signup and view all the answers

    What aspect of the new brake system contributes to reduced wear and tear?

    <p>High friction composite material</p> Signup and view all the answers

    What is a key distinguishing feature of the design of the bogie mounted air brake system?

    <p>Flexibility provided by flexible hoses</p> Signup and view all the answers

    Which characteristic of the composite brake blocks aids in achieving a uniform coefficient of friction?

    <p>The blocks utilize a specialized manufacturing process</p> Signup and view all the answers

    What type of braking performance improvement is associated with the bogie mounted air brake system?

    <p>Diminished braking intervals</p> Signup and view all the answers

    What is the specified working stroke length for the main line coaches?

    <p>32mm</p> Signup and view all the answers

    Which measurement is indicated for the self line in the specifications?

    <p>281</p> Signup and view all the answers

    What measurement is stated for the BG EMU coaches?

    <p>60mm</p> Signup and view all the answers

    Which of the following values is NOT associated with the working stroke for any of the mentioned coaches?

    <p>22</p> Signup and view all the answers

    Which type of coaches has a working stroke greater than that of the main line coaches?

    <p>BG EMU coaches</p> Signup and view all the answers

    Which of the following dimensions corresponds to the main line coaches?

    <p>32mm</p> Signup and view all the answers

    What is the primary discrepancy between the working stroke of the main line coaches and the BG EMU coaches?

    <p>The main line coaches have a shorter stroke.</p> Signup and view all the answers

    What does the notation '32mm for self line' imply in the specifications?

    <p>The stroke length specifically for a self-retracting mechanism.</p> Signup and view all the answers

    What could the number '281' signify in the context of the content provided?

    <p>Total inventory quantity</p> Signup and view all the answers

    What is the maximum temperature that should occur on the opposing friction surface of the brake blocks during braking?

    <p>400 °C</p> Signup and view all the answers

    What is the maximum allowable variation in the average coefficient of friction when braking conditions remain the same?

    <p>±15%</p> Signup and view all the answers

    Which of the following must be marked on each brake block for identification?

    <p>Material type</p> Signup and view all the answers

    What is the minimum thickness to which the brake blocks can wear down, including the back plate?

    <p>12 mm</p> Signup and view all the answers

    What is a required physical characteristic of the elements making up the brake blocks?

    <p>They must be spread uniformly.</p> Signup and view all the answers

    Which marking is specifically required for the identification of non-asbestos type brake blocks?

    <p>'KNA'</p> Signup and view all the answers

    What must be ensured regarding the contact between the brake block and the running surface of the wheel?

    <p>They must never touch when the block is fully worn.</p> Signup and view all the answers

    What indicates the condition of brake blocks related to pitting or flaws?

    <p>They must be free from pitting and defects.</p> Signup and view all the answers

    What factors are crucial for determining the service life of brake blocks?

    <p>Type of material and driving conditions.</p> Signup and view all the answers

    Which working condition could cause health hazards due to brake block usage?

    <p>Brake blocks generating powder or gas after prolonged use.</p> Signup and view all the answers

    What happens when the piston stroke exceeds a predetermined value?

    <p>The ratchet with adjusting screw turns.</p> Signup and view all the answers

    What initiates the forward motion of lever (3) after brake block (4) contacts wheel (5)?

    <p>The fulcrum (b) shifts forward.</p> Signup and view all the answers

    What indicates that the piston unit has extended over its full range?

    <p>A red paint mark on the adjusting tube assembly.</p> Signup and view all the answers

    How does the automatic slack take-up feature operate during the return stroke?

    <p>It adjusts the length of the piston rod automatically.</p> Signup and view all the answers

    What role does lever (8) play in the braking mechanism?

    <p>It rotates about fulcrum (c) to apply the brakes.</p> Signup and view all the answers

    Which component has moving parts that require a reset after a predetermined stroke?

    <p>Adjusting screw on the ratchet</p> Signup and view all the answers

    What is the primary impact of a reduced brake pipe pressure in this system?

    <p>It causes the distributor valve to engage the brake cylinder.</p> Signup and view all the answers

    What mechanical action occurs when lever (3) moves about its fulcrum?

    <p>It facilitates the contact of brake block with the wheel.</p> Signup and view all the answers

    Which component is responsible for sensing the brake pipe pressure reduction?

    <p>Distributor valve</p> Signup and view all the answers

    How many pin joints are per bogie in the brake gear arrangement?

    <p>51</p> Signup and view all the answers

    Study Notes

    Bogie Mounted Air Brake System

    • This system addresses issues with previous designs, such as slack adjuster failure and cast iron brake blocks.
    • It uses 8" diameter cylinders instead of 14" cylinders for each bogie, with built-in single-acting slack adjusters that compensate for wheel/brake block wear.
    • High friction composite 'K' type brake blocks are used, and the material composition is chosen for optimal balance between braking characteristics and wear resistance.
    • Bogie brake rigging is modified to provide a mechanical advantage of 7.644 for non-AC coaches and 8.40 for AC coaches, using curved profile pull rods interconnecting levers.
    • These rods have additional holes for adjustment after specified wear.
    • Brake cylinders are mounted on the bogie frame, with pneumatic pipelines connecting cylinders on one bogie laid over the frame. Flexible hoses connect output lines to bogie pneumatic lines for flexibility during bogie movements.

    Composition Brake Blocks

    • Low friction composite brake blocks offer benefits like reduced braking distance, lower weight, and increased wear life compared to cast iron blocks; these blocks also reduce wear and tear of the brake rigging and produce less noise during braking.
    • Composition material balance is crucial for braking characteristics and wear resistance, with a balance needed between these factors and the wear on the running surface of wheels and effect on adhesion between rail and wheel.
    • The average friction coefficient is 0.25. This coefficient should remain consistent regardless of initial speed, bedding-in, pressure, or temperature.
    • Asbestos-based 'K' type blocks conform to RDSO drawing No. 98146. Asbestos usage is prohibited. Lead and zinc, in any form, are also not recommended in the brake blocks.

    Maintenance and Operation

    • Bogie mounted brake system maintenance closely parallels that of the standard air brake system, with some critical differences in brake cylinders.
    • Correct part usage, avoiding intermixing of components like pull rods and ensuring precise component assembly are critical for prevention of issues and correct assembly and maintenance.
    • Testing procedures ensure functionality and identify leakage points, with tests conducted at various pressures and observing piston movement.
    • Precise component identification details and usage are extremely important for correct assembly and maintenance, especially with regard to pull rods and the adjusting tube assembly. Precise maintenance and adjustment using the red paint mark is critical to avoid exceeding the maximum piston stroke.

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    Bogie Mounted Air Brake System PDF

    Description

    Test your knowledge on the advanced features of the Bogie Mounted Air Brake System. This quiz covers the design improvements, braking mechanisms, and the composition of composite brake blocks compared to traditional systems. Explore the mechanical advantages and specifications of this innovative braking technology.

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