Chapter 3: Bogies
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Questions and Answers

What is the purpose of the 2mm thick x 25mm wide strip mentioned in the context of the bogie frame?

  • To facilitate the welding of guide rails
  • To provide structural support to the bogie frame
  • To mark the positioning of various components (correct)
  • To balance the weight distribution of the bogie

    • Which locations on the bogie frame are designated for the bolsters suspension brackets?

  • A, B, C, D
  • E, F, G, H (correct)
  • 1, 2, 3, 4
  • X, Y, Z, W

    • What must the welding joint avoid according to the guidelines?

  • Coming under the bogie guide (correct)
  • Intersection with the punch marks
  • Alignment with the bolster brackets
  • Contact with transverse joints

    • What tolerance is allowed for the bolsters suspension bracket pin holes based on the specifications?

    <p>± 0.5mm</p> Signup and view all the answers

    Which of the following statements about the alignment of hanger brackets is correct?

    <p>No inaccuracies in location will be permitted</p> Signup and view all the answers

    What is the total mechanical advantage of a bogie for non-ac coaches?

    <p>7.644</p> Signup and view all the answers

    Which drawing number corresponds to the components of bogie mounted air brakes for ICF design?

    <p>WTAC4-3-3-401</p> Signup and view all the answers

    What mechanical advantage do AC coaches have per bogie?

    <p>8.40</p> Signup and view all the answers

    What is indicated by the reference drawing number in the components list for bogie brakes?

    <p>Design specifications</p> Signup and view all the answers

    Which of the following statements is true regarding the values listed in the context?

    <p>AC coaches have a mechanical advantage higher than that of non-ac coaches.</p> Signup and view all the answers

    How many tons is the bogie mounted air brake system designed for according to the provided information?

    <p>16 t</p> Signup and view all the answers

    What does the reference drawing number SK-93371 pertain to?

    <p>Bogie mounted brake systems</p> Signup and view all the answers

    What is the total quantity of the lever components listed?

    <p>24</p> Signup and view all the answers

    Which component has the highest quantity listed in the data?

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

    How many units of the Safety Wire Rope are required?

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

    Which of the following components is listed with a quantity of 4?

    <p>Plain Washer (ICF/STD 3-2-003)</p> Signup and view all the answers

    What is the reference drawing number for the Brake Head & block complete (LH)?

    <p>T-3-1-801</p> Signup and view all the answers

    What quantity of the Pin for the Safety wire rope is listed?

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

    The total number of Plain Washers listed in the data is?

    <p>64</p> Signup and view all the answers

    Which component has a quantity of 32 listed in the data?

    <p>Split cotter (EMU-3-2-048)</p> Signup and view all the answers

    How many Pin components are listed with a quantity of 4?

    <p>2</p> Signup and view all the answers

    What is the first step in the maintenance of bogies?

    <p>Bogie cleaning</p> Signup and view all the answers

    Which process involves placing a dead weight on the bogie frame?

    <p>Dismantle bolster suspension hangers</p> Signup and view all the answers

    What should be done with the components after cleaning?

    <p>Collect components into respective bins/pallets</p> Signup and view all the answers

    Which of the following components is NOT mentioned as needing to be collected?

    <p>Bogie frame</p> Signup and view all the answers

    What is the next step after disconnecting the equalising stays?

    <p>Remove the bolster springs</p> Signup and view all the answers

    Which equipment is most likely used to lift the bolster off the bolster springs?

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

    What follows the repair of components in the bogie maintenance process?

    <p>Load testing and adjustment</p> Signup and view all the answers

    What is the purpose of sending the bogie frame to the washing plant?

    <p>For thorough cleaning</p> Signup and view all the answers

    During the maintenance process, which activity is performed immediately after cleaning the bogie?

    <p>Attention to components</p> Signup and view all the answers

    What does the term 'BSS' in BSS hanger stand for?

    <p>Bolster Suspension System</p> Signup and view all the answers

    What is the nominal size of the measurement point E-F?

    <p>1500 ± 1.0 mm</p> Signup and view all the answers

    What is the variation associated with the nominal size of measurement points G-H?

    <p>± 1.0 mm</p> Signup and view all the answers

    What is the actual size for the measurement point I-K?

    <p>1752 mm</p> Signup and view all the answers

    Which measurement point has a variation of ± 0.5 mm?

    <p>z-F</p> Signup and view all the answers

    What is the nominal size for measurement point F-H?

    <p>2629 ± 1.0 mm</p> Signup and view all the answers

    For which measurement points is the nominal size of 876 ± 0.5 mm specified?

    <p>R-S</p> Signup and view all the answers

    What is the nominal size and variation for the measurement point g5-g6?

    <p>570 ± 1.0 mm</p> Signup and view all the answers

    What is the actual size for measurement point g3-g8?

    <p>3612 mm</p> Signup and view all the answers

    Which of the following measurement points has the same nominal size as I-K?

    <p>L-M</p> Signup and view all the answers

    What is the variation for the measurement points g4-g7?

    <p>± 1.0 mm</p> Signup and view all the answers

    What is the primary function of equalising stays in bogies?

    <p>To reduce lateral thrust on bolster springs</p> Signup and view all the answers

    Which maintenance procedure is appropriate to ensure the longevity of the bogie?

    <p>Using high pressure hot water to wash the bogie</p> Signup and view all the answers

    What is the consequence of not designing bolster springs to handle lateral forces?

    <p>Potential damage to the bogie during lateral movements</p> Signup and view all the answers

    What is the primary goal of cleaning the oil bath plank and bolster during maintenance?

    <p>To prevent damage from contaminants</p> Signup and view all the answers

    Which characteristic of the links in equalising stays enhances their functionality?

    <p>Pin connections at both ends</p> Signup and view all the answers

    What role does the synthetic rubber bush play in the center pivot arrangement of ICF bogies?

    <p>It transmits force without shock and reduces noise.</p> Signup and view all the answers

    Which of the following components is NOT mentioned in the context of the center pivot assembly?

    <p>Safety Wire Rope</p> Signup and view all the answers

    In terms of structure, what is the main function of the centre pivot pin in ICF bogies?

    <p>To connect the body with the bogie for force transmission.</p> Signup and view all the answers

    Which of the following terms best describes the purpose of the upper rubber washer in the assembly?

    <p>To cushion impacts and reduce vibrations.</p> Signup and view all the answers

    What impact do the synthetic rubber bushes have on the performance of the bogie during braking?

    <p>They prevent shock transmission and reduce noise during braking.</p> Signup and view all the answers

    What is the primary reason for including a protective tube in the center pivot arrangement?

    <p>To prevent dirt and debris from contaminating the bush.</p> Signup and view all the answers

    Which component acts as a mechanical buffer in the assembly's response to tractive forces?

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

    What is the specified oil level for all AC and non-AC coaches according to the guide?

    <p>686</p> Signup and view all the answers

    Which component is located directly above the lower rubber washer in the modified axle box guide arrangement?

    <p>Compensating ring</p> Signup and view all the answers

    What is the oil level measurement before assembling for the lower spring seat?

    <p>104</p> Signup and view all the answers

    Which measurement corresponds to the bogie on the luggage side for power cars?

    <p>670</p> Signup and view all the answers

    In the modified axle box guide arrangement, which component is found just below the safety strap?

    <p>Lower spring seat</p> Signup and view all the answers

    What is the correct value for measurement point X to rail level?

    <p>686</p> Signup and view all the answers

    What is the dimension for the lower rubber washer listed in the guide?

    <p>92.5</p> Signup and view all the answers

    Which of the following components is specifically designed for power cars among the listed values?

    <p>Oil level measurement</p> Signup and view all the answers

    What measurement is utilized for the bogie on the generator side?

    <p>672</p> Signup and view all the answers

    What is the total mechanical advantage for bogies equipped with air brakes for AC coaches?

    <p>8.40</p> Signup and view all the answers

    What is the reference drawing number for the components of bogie mounted air brakes for ICF design?

    <p>WTAC4-3-3-401</p> Signup and view all the answers

    Which description is true regarding the bogie mounted brake rigging for non-AC coaches?

    <p>It includes a 16 t bogie specification.</p> Signup and view all the answers

    Which of the following statements accurately reflects the modifications in the bogie brake rigging?

    <p>The mechanical advantage ratios differ between AC and non-AC coaches.</p> Signup and view all the answers

    Which part of the maintenance manual outlines the total mechanical advantage of bogies?

    <p>Table 3.5</p> Signup and view all the answers

    What is the significance of the reference drawing number SK-93371 in the context?

    <p>It pertains to the bogie brake components.</p> Signup and view all the answers

    What kind of performance does a bogie mounted brake rigging achieve for non-AC coaches?

    <p>A total mechanical advantage of 7.644.</p> Signup and view all the answers

    Which component specification is derived from the provided ICF drawing number WTAC4-3-3-401?

    <p>Bogie mounted air brake components.</p> Signup and view all the answers

    In the context of the maintenance manual, what does the reference drawing number indicate?

    <p>The specifications of specific components.</p> Signup and view all the answers

    What value is associated with the total mechanical advantage for the bogie mounted brake rigging?

    <p>7.644</p> Signup and view all the answers

    What is the quantity of the Split Cotter listed in the components data?

    <p>26</p> Signup and view all the answers

    Which component has the drawing number T-3-2-648?

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

    How many units of Plain Washer with drawing number ICF/STD-3-2-103 are required?

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

    What is the primary shape represented by the drawing number not listed in the components data?

    <p>None of the above</p> Signup and view all the answers

    Which component is associated with the quantity of 4?

    <p>Brake beam</p> Signup and view all the answers

    What is the total quantity of Pins listed in the data?

    <p>42</p> Signup and view all the answers

    Which of the following components does not list a drawing number?

    <p>Split Cotter</p> Signup and view all the answers

    What component is defined as requiring 8 units as per the component data?

    <p>Safety wire rope</p> Signup and view all the answers

    From the given components, which one has the smallest quantity listed?

    <p>Pin for Safety wire rope</p> Signup and view all the answers

    Which component corresponds to the drawing number T-3-2-802?

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

    Study Notes

    Chapter 3: Bogies

    • ICF/RCF all-coil bogies are used in mainline BG coaches. Key design details are briefly described.
    • Leading parameters for an ICF bogie are listed in Table 3.1.
    • Maximum axle load bearing is 16.25 tonnes or 13 tonnes.
    • Wheel base is 2896mm.
    • Wheel diameter is 915mm.
    • Axles use telescopic axle guides with oil damping.
    • Primary suspension uses coil springs.
    • Secondary suspension also uses coil springs, with hydraulic shock absorbers.
    • Coach body weight is transferred to the bogie frame via side bearers, spaced 1600mm apart.
    • Side bearers have lubricated metal slides in oil baths.
    • Bogie pivots are only for rotational transmission of tractive/braking forces.
    • Bogie frame construction is all-welded, light construction, with a 2.896-meter wheelbase.
    • Wheel sets have self-aligning spherical roller bearings in cast steel axle box housings.
    • Helical coil springs are used for both primary and secondary suspensions.
    • Bogie bolster helical springs are situated on the lower spring beam.
    • Hydraulic shock absorbers and dashpots are used in the primary and secondary suspensions to damp vertical oscillations.
    • Axle box guides are cylindrical and welded to the bogie side frame.
    • They house the axle box springs and also serve as shock absorbers.
    • Dampers are provided to protect against misalignment from resilient fittings.
    • Dampers are provided for isolating vibration through rubber pads in primary and secondary suspension.
    • The bogies are currently manufactured by ICF/RCF and are all-welded, light-weight construction.

    Bogie Assembly (Figure 3.1)

    • Detailed components are shown in Figure 3.1 of the manual.
    • All-welded light construction is used.
    • Wheel base is 2.896 metres.
    • Wheel sets are mounted with self-aligning spherical roller bearings.
    • Helical coil springs are used in both primary and secondary suspension.

    Axle Box Guide with Dash Pot Arrangement (Figures 3.2a & 3.2b)

    • Axle box guides are cylindrical.
    • Guides are welded to the bogie side frame.
    • Guides, along with lower spring seats, house the axle box springs.
    • Guides also act as shock absorbers.
    • These guides are fitted with guide caps with nine 5mm-diameter equidistant holes through which oil in lower spring seat passes.

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    Maintenance Manual for BG Coaches of ICF Design-73-108 PDF

    Description

    This quiz covers the key design parameters and features of ICF/RCF all-coil bogies used in mainline BG coaches. Topics include axle load, wheel base, and suspension systems, providing insight into their construction and functionality. Perfect for students studying railway engineering and bogie design.

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