Quiz difficult

Carriage & Wagon Theory for LDCE(Mech)

difficult lhb schedules

This detailed sequence includes specific cutting dimensions and steps.

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1. What is the exact procedure for corrosion repair in side sill including cutting dimensions and sequence?

1. Remove lavatory module, cut side wall sheet 440mm from bottom flange, cut corroded flange plate, cut welding of side sill, edge preparation, fit new side sill, tack weld, full weld, fit top flange, weld body pillars, prepare and weld side wall sheet, skin tensioning by spot heating, paint

2. Directly weld without cutting

3. Only paint over corrosion

4. Replace entire coach

This comprehensive list covers all critical areas prone to corrosion.

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2. What is the complete list of underframe vulnerable members and locations for corrosion inspection?

1. Headstock, Body bolsters, Side sills beneath lavatories, Longitudinal/cross members, Door collars, Mounting brackets for CDTS/Bio-toilet, Draft gear pocket, Bi-metallic joints, Lifting pads, Top flange beneath Lavatory module

2. Only sole bars

3. Only headstock

4. Only cross members

Both crack depth and height are checked for replacement.

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3. What are the exact wear limits for ball joint control arm and rubber pad?

1. Ball joint control arm: t ≥ 10mm; Rubber pad: t ≥ 10mm, h ≤ 30.7mm

2. Ball joint: t ≥ 8mm; Rubber pad: t ≥ 8mm, h ≤ 32mm

3. Ball joint: t ≥ 12mm; Rubber pad: t ≥ 12mm, h ≤ 28mm

4. Ball joint: t ≥ 15mm; Rubber pad: t ≥ 15mm, h ≤ 25mm

Different components have different replacement criteria.

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4. What are the exact wear limits for traction center rubber bush and longitudinal pad?

1. Traction center: t ≥ 6mm replace; Longitudinal pad: L ≤ 23.5mm replace

2. Traction center: t ≥ 5mm; Longitudinal pad: L ≤ 25mm

3. Traction center: t ≥ 7mm; Longitudinal pad: L ≤ 22mm

4. Traction center: t ≥ 8mm; Longitudinal pad: L ≤ 20mm

Both crack dimensions and height are checked.

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5. What are the exact wear limits for lateral bump stop?

1. Cracks: length < 60mm, depth < 7mm; Height L < 30mm replace

2. Cracks: length < 50mm, depth < 5mm; Height < 35mm replace

3. Cracks: length < 70mm, depth < 8mm; Height < 25mm replace

4. Cracks: length < 80mm, depth < 10mm; Height < 40mm replace

This has different limits than the rubber disc.

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6. What are the exact crack limits for secondary suspension rubber spring?

1. Vertical cracks: length < 10mm, depth < 4mm; Horizontal cracks: length < 30mm, depth < 4mm

2. Vertical: length < 15mm, depth < 5mm; Horizontal: length < 40mm, depth < 5mm

3. Vertical: length < 8mm, depth < 3mm; Horizontal: length < 25mm, depth < 3mm

4. Vertical: length < 20mm, depth < 6mm; Horizontal: length < 50mm, depth < 6mm

Vertical and horizontal cracks have different length and depth limits.

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7. What are the exact crack limits for secondary suspension rubber disc?

1. Vertical cracks: length=10mm, depth=5mm; Horizontal cracks: length=40mm, depth=5mm

2. Vertical: length=15mm, depth=6mm; Horizontal: length=50mm, depth=6mm

3. Vertical: length=8mm, depth=4mm; Horizontal: length=30mm, depth=4mm

4. Vertical: length=12mm, depth=5mm; Horizontal: length=45mm, depth=5mm

Two parameters: depth of crack (t) and height (h) determine replacement.

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8. What are the exact wear limits for primary suspension internal pad?

1. t ≥ 8mm, h ≤ 22mm replace

2. t ≥ 10mm, h ≤ 20mm replace

3. t ≥ 6mm, h ≤ 25mm replace

4. t ≥ 12mm, h ≤ 18mm replace

This uses a formula comparing the sum of acceptable portions to total length.

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9. What is the exact rule for checking journal surface waves using marking blue?

1. A + B + C > 2/3 L, where L is total length

2. A + B + C = L

3. A + B + C < 1/2 L

4. A + B + C > 3/4 L

This includes journal diameter, inner diameter, mounting force, and end play with acceptable minimum.

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10. What is the complete procedure for SKF CTRB mounting including pressure and end play?

1. Journal dia 130.043-130.068mm, Inner dia 130.0 -0.000 to -0.025mm, Mounting force 28-32 tons (210-240 kg/cm²), End play 0.025-0.330mm (min 0.02mm acceptable)

2. Journal dia 130.0-130.1mm, Inner dia 130.0mm, Force 25-30 tons, End play 0.1-0.3mm

3. Journal dia 129.9-130.0mm, Inner dia 129.9mm, Force 20-25 tons, End play 0.05-0.2mm

4. Journal dia 130.05-130.1mm, Inner dia 130.05mm, Force 30-35 tons, End play 0.01-0.1mm

This includes journal diameter, inner diameter, seating load, and mounted end play.

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11. What is the complete procedure for TIMKEN CTRB mounting including seating load and end play?

1. Journal dia 130.043-130.068mm, Inner dia 129.967-129.980mm, Seating load 37-42 tonnes, Mounted end play 0.025-0.330mm

2. Journal dia 130.0-130.1mm, Inner dia 130.0mm, Seating load 30-35 tonnes, End play 0.1-0.4mm

3. Journal dia 129.9-130.0mm, Inner dia 129.9mm, Seating load 25-30 tonnes, End play 0.05-0.3mm

4. Journal dia 130.05-130.1mm, Inner dia 130.05mm, Seating load 40-45 tonnes, End play 0.01-0.2mm

This height must be checked and adjusted during D3 schedule.

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12. What is the exact air spring installation height requirement and the RCF letter reference?

1. 289-294 mm as per RCF Letter to MD44121 dated 24/07/2020

2. 280-285 mm as per MDTS 176

3. 290-295 mm as per PLW0954

4. 285-290 mm as per RDSO/2011/CG-03

This includes wiring checks with fault codes, timers, pressure switches, sensor gaps, and valve tests.

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13. What is the complete WSP preventive check schedule for Knorr Bremse including fault codes?

1. Wiring check with fault codes 11,21,31,41 for sensors and 13,23,33,43 for dump valves; K-05 relay timer 10±1 minutes; Pressure switch 1.8/1.3 Kg/cm²; Speed sensor gap 0.9-1.4 mm; Dump valve test with 8888 display

2. Only visual check

3. Only sensor check

4. Only dump valve check

Testing must rotate among coaches and among air springs within a coach.

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14. What is the exact procedure for FIBA device functionality test with coach rotation requirement?

1. Test one coach per rake during primary maintenance, not repeat until all coaches covered, drain air from different spring each time so all 4 springs covered in 4 tests

2. Test all coaches every trip

3. Test only when problem occurs

4. Test annually only

Different spring failures have different allowable speeds for continued travel.

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15. What are the exact speed restrictions for different spring failures en-route?

1. One primary coil broken: 80 kmph, One outer secondary coil broken: 90 kmph, Deflated air spring: 60 kmph

2. Primary broken: 70 kmph, Secondary broken: 80 kmph, Air spring deflated: 50 kmph

3. Primary broken: 60 kmph, Secondary broken: 70 kmph, Air spring deflated: 40 kmph

4. Primary broken: 100 kmph, Secondary broken: 110 kmph, Air spring deflated: 80 kmph

Different coach types and spring positions have specific colour codes.

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16. What is the complete colour coding scheme for primary and secondary springs for different coach types?

1. Primary: AC coaches Green, Power Car Yellow; Secondary: AC coaches Inner Green, Outer Green; Power Car Side1 Blue, Side2 Blue

2. Primary: AC Red, Power Car Blue; Secondary: AC Inner Yellow, Outer Yellow

3. Primary: AC Blue, Power Car Red; Secondary: AC Inner Red, Outer Red

4. Primary: AC Black, Power Car White; Secondary: AC Inner White, Outer White

This is a specific inner secondary spring with lateral stiffness specification.

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17. What are the exact parameters for secondary spring drawing no. 1269513 including bar dia, mean coil dia, test load, height, and lateral stiffness?

1. Bar dia 34mm, Mean coil dia 246mm, Test load 25.24 ± 1% KN, Height 468 +0/-5 mm, Lateral stiffness 31.1 N/mm

2. Bar dia 30mm, Mean coil dia 220mm, Test load 22 KN, Height 450 mm, Lateral stiffness 25 N/mm

3. Bar dia 36mm, Mean coil dia 250mm, Test load 28 KN, Height 480 mm, Lateral stiffness 35 N/mm

4. Bar dia 32mm, Mean coil dia 230mm, Test load 24 KN, Height 460 mm, Lateral stiffness 30 N/mm

This is a specific outer primary spring with precise technical parameters.

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18. What are the exact parameters for primary spring drawing no. 1267411 including bar dia, mean coil dia, test load, height, and stiffness?

1. Bar dia 38mm, Mean coil dia 194mm, Test load 28.91 ± 1% KN, Height 264 +0/-4 mm, Vertical stiffness 475 ± 5% N/mm

2. Bar dia 32mm, Mean coil dia 180mm, Test load 25 KN, Height 250 mm, Stiffness 400 N/mm

3. Bar dia 40mm, Mean coil dia 200mm, Test load 30 KN, Height 270 mm, Stiffness 500 N/mm

4. Bar dia 35mm, Mean coil dia 190mm, Test load 27 KN, Height 260 mm, Stiffness 450 N/mm

This comprehensive list covers all critical components to check during rolling examination.

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19. What is the complete list of rolling in/rolling out items for LHB coaches?

1. Hanging Parts, Hot axle, Broken parts, Wheel skidding, Air Pressure leakage, Deflated Air Spring, Brake binding, Securing arrangement of all tanks, I.V. Coupler sagging, Whistling sound from brake pad, Bearing front & back, Earthing box

2. Only brakes and wheels

3. Only bogie and suspension

4. Only coupler and buffers

Different coach types have specific numerical ranges in the numbering system.

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20. What is the exact coach numbering range in the previous system for all coach types?

1. AC first class 001-025, Composite 026-050, AC-2T 051-100, AC-3T 101-150, CC 151-200, SL 201-400, GS 401-600, 2S 601-700, SLR 701-800, Pantry/others 801+

2. AC first class 001-050, AC-2T 051-100, AC-3T 101-200, CC 201-300, SL 301-500

3. AC first class 001-020, AC-2T 021-060, AC-3T 061-120, CC 121-180, SL 181-350

4. AC first class 001-030, AC-2T 031-080, AC-3T 081-140, CC 141-190, SL 191-380

This is a comprehensive list of tools with specific sizes and types.

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21. What are the exact 19 items in the tool kit box with specifications?

1. Tool Bag, Punch 12", Chisel, Ferrule punch, Nylon mallet, Allen keys, Ball Peen Hammer, Open/ring wrenches (various sizes), Ratchet handle with sockets, Adjustable wrenches, Pipe wrench, Screwdriver set, Pliers, Wire stripper, Multi-meter, Allen keys set, Measuring Tape, Reset key, Magnifying glass, Binding wire, Teflon tape, Torch

2. Only spanners

3. Only screwdrivers

4. Only hammers

The kit includes many specialized items with specific quantities.

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22. What is the complete tool kit list for en-route troubleshooting with specific quantities?

1. Toolkit (1 set), Laser Temperature Gun (1), Adaptor (2 sets), Angle cock (2), BP hose (2 sets), FP hose (2 sets), Ferrule joints (8 sets each of various sizes), M16 bolts (10 each), etc.

2. Only spanners and screwdrivers

3. Only hammer and chisel

4. Only welding equipment

Fan types vary by coach class and location, with lavatory fans only in AC coaches.

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23. What are the exact fan specifications for AC and Non-AC coaches including size, type, and location?

1. AC: 400 mm (Swivelling for 1st, Fixed for others), Lavatory 200 mm fixed; Non-AC: 400 mm fixed, No lavatory fans

2. AC: 300 mm all areas; Non-AC: 300 mm all

3. AC: 450 mm oscillating; Non-AC: 350 mm ceiling

4. AC: 350 mm all; Non-AC: 300 mm with regulator

AC and Non-AC coaches have different lighting requirements for different areas.

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24. What are the exact lux level requirements for different coach types and areas as per passenger amenity schedule?

1. AC coaches: Compartment 120 lux, Lavatory 100 lux, Corridor 80 lux; Non-AC: 80 lux all areas

2. AC: 150 lux all areas; Non-AC: 100 lux all areas

3. AC: 100 lux all areas; Non-AC: 60 lux all areas

4. AC: 200 lux compartment, 150 lux others; Non-AC: 100 lux all

This includes steps from approach to final reconfirmation.

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25. What is the exact sequence for coupling CBC fitted coaches including all safety checks?

1. Bring at 1m, unlock handle, open coupler (90°), align, couple at 2-3 km/h, check tell-tale, lock handle, pull train slightly for reconfirmation

2. Couple at high speed

3. Open coupler, bring together, lock

4. Align and couple directly

This uses a special coupling to connect BP and FP hoses of the affected coach.

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26. What is the complete procedure for bypassing BP pressure using BP-FP BY-PASS coupling?

1. Close FP and BP cocks, uncouple hoses, couple BY-PASS coupling between BP hose and FP hose of affected coach, repeat at other end, open cocks, isolate affected coach

2. Directly connect BP to BP

3. Use normal hose

4. Remove affected coach

This involves disconnecting the affected pipe and fitting a dummy plug.

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27. What are the exact steps for BP-FP cut off angle failure on last coach?

1. Close rear cut off cock of adjacent coach, loosen check nut, disconnect pipe, tighten dummy plug

2. Replace angle cock

3. Remove last coach

4. Bypass with hose

This involves isolating the affected coach and conducting a continuity test.

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28. What is the complete procedure for BP failure en-route including specific valve positions and sequence?

1. Bring flexible pipe, lay from one end to other, close BP cocks, couple pipe, manually release and isolate affected coach, conduct continuity test

2. Replace pipe directly

3. Remove coach from train

4. Bypass without isolation

Two conditions trigger replacement: weight loss percentage and age.

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29. What is the exact loss of weight percentage and age limit for gas cartridge replacement?

1. 5% loss or 3 years old

2. 10% loss or 5 years old

3. 15% loss or 4 years old

4. 20% loss or 6 years old

Different actions are required at monthly, annual, and 3-year intervals.

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30. What are the exact acceptance criteria for fire extinguisher maintenance including monthly, annual, and 3-year hydraulic test specifications?

1. Monthly: visual check; Annual: empty contents; 3-year: 25 Kg/cm² for 2.5 min

2. Monthly: weigh; Annual: replace; 5-year: 30 Kg/cm² for 3 min

3. Quarterly: clean; Half-yearly: test; 4-year: 20 Kg/cm² for 2 min

4. Weekly: inspect; Monthly: test; 2-year: 15 Kg/cm² for 5 min

This TSO reference covers train parting procedures.

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31. What is the complete TSO reference for driver waiting time after brake application?

1. TSO No. Coaching & Freight/99/1(Rev-1), Para-1.1 -- Train parting

2. IRCA Part IV Para-3.9.1

3. SR 4.31.02 of GR & SR 2011

4. RPC 4 recommendation

Some components have specific torque values, others have condition checks.

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32. What are the exact torque values for various bogie components as per Annexure 10.1?

1. Traction Centre support frame M20X100: 340 Nm, Traction rod S/Bloc: NEW/SERVICEABLE condition check

2. All bolts 200 Nm

3. M16 bolts 150 Nm, M20 bolts 250 Nm

4. M24 bolts 400 Nm

The depth, pattern, and location are all specified.

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33. What are the exact criteria for pitting holes on bogie frame as per RDSO No SV Bogie General dt. 14.07.2022?

1. Up to 5mm, any location, continuous allowed

2. Up to 4mm, staggered, non-continuous, not concentrated on bottom bend portion of side frame

3. Up to 3mm, any pattern, anywhere

4. Up to 6mm, with repair

Two specifications contribute to the total DFT with specific micron values.

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34. What is the complete DFT requirement for primer and paint as per M&C/PCN/123/2006 and MDTS-094 with exact breakdown?

1. Total 200 microns (100 + 100)

2. Total 265 microns (125 + 140)

3. Total 300 microns (150 + 150)

4. Total 250 microns (120 + 130)

This is a specific corrosion protection treatment for rubber joints.

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35. What is the exact composition of the protection treatment to be renewed on control arm rubber joint during Schedule D3?

1. TECTYL / CORTEC VC 1368

2. Blasol - 135

3. Molykote M55

4. Autol Top 2000

There are three ranges: reject, re-machine (once), and accept without machining.

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36. What is the complete specification for control arm rejection, re-machining, and acceptance criteria?

1. Reject at 230.5mm, re-machine 230.312-230.5mm once, accept below 230.312mm

2. Reject at 231.0mm, re-machine 230.5-231.0mm, accept below 230.5mm

3. Reject at 230.3mm, re-machine 230.0-230.3mm, accept below 230.0mm

4. Reject at 230.8mm, re-machine 230.5-230.8mm, accept below 230.5mm

One reference is for wheel testing, the other for bearing limits.

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37. What are the exact RDSO letter references for Eddy Current Array Testing and residual magnetism limits?

1. MC/WA/Genl. dated 02.09.2019 and MC/CTRB/Genl. dated 19.01.2022

2. MC/CTRB/Defects dt-29/12/17 and MC/CTRB/Genl dated 10.08.2021

3. MC/BLB/CBC dated 26.07.2010 and MC/LHB/Coach dated 26.07.2010

4. RDSO No SV Bogie General dt. 14.07.2022 and IRCAMTECH/M/GWL/Check-Sheet LHB Bogies Date-25.02.2020

This is a comprehensive sequence from visual checks to function testing.

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38. What is the exact sequence of actions for air brake equipment maintenance during Schedule D2?

1. Visual check, wear check, fixings check, pipe fixing check, dust removal, lubrication, filter cleaning, clearance verification, WSP inspection, function test with pressure measurement

2. Only visual check and lubrication

3. Only function test

4. Only wear check and replacement

New pads have a specific width, and replacement is at a minimum allowable depth.

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39. What is the complete procedure for checking brake pads during Schedule D1 including width and wear limits?

1. Check only presence, replace if missing

2. Check play of brake-pads in holders and monitor wear. If Brake Pad(s) is worn out (new pads 35mm, min allowable 7mm) replace in full set formation

3. Check only thickness without removal

4. Replace all pads regardless of condition

Depot schedules have daily/weekly/monthly tolerances, shop schedules have kilometer-based limits.

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40. What are the exact tolerance limits for each coaching depot and shop schedule in terms of days and kilometers?

1. D1: ±0 days, D2: ±3 days, D3: ±15 days, SS-I: +30 days/6L km, SS-II: 36 months/12L km, SS-III: 72 months/24L km

2. D1: ±1 day, D2: ±5 days, D3: ±10 days, SS-I: +15 days/5L km, SS-II: 30 months/10L km, SS-III: 60 months/20L km

3. D1: ±2 days, D2: ±7 days, D3: ±20 days, SS-I: +45 days/7L km, SS-II: 40 months/14L km, SS-III: 80 months/28L km

4. D1: ±0 days, D2: ±2 days, D3: ±10 days, SS-I: +20 days/5.5L km, SS-II: 33 months/11L km, SS-III: 66 months/22L km

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