Quiz difficult

Carriage & Wagon Theory for LDCE(Mech)

difficult wagon bogie

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1. What is the complete axle load and speed matrix for different wagon types in Table 606?

1. Only one value per wagon

2. Multiple axle loads (20.32t, 22.3t, 22.8t, 22.9t, 25t) with different empty/loaded speeds for each configuration

3. Only speed values

4. Only axle load values

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2. What are the complete dimensions for TIMKEN Class K bearing components?

1. Same as BRENCO

2. Bore 157.175mm, O.D. min 249.555mm, C. bore max 238.252mm/min 237.998mm, backing ring 191.211mm, grease 57/170/284g

3. Different bore

4. Different O.D.

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3. What are the complete dimensions for BRENCO Class K bearing components?

1. No dimensions given

2. Bore 157.175mm, O.D. min 249.555mm, C. bore max 238.252mm/min 237.998mm, backing ring 191.211mm, grease 170/15/355g

3. Only bore dimension

4. Only O.D. dimension

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4. What is the complete speed for BOXNS with LWLH25 at 25t?

1. 100/100 km/h

2. 80/100 km/h

3. 80/80 km/h

4. 75/75 km/h

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5. What is the complete spring arrangement for BOXNS with LWLH25?

1. Outer-14, Inner-14, Snubber-4

2. Outer-12, Inner-12, Snubber-8

3. Outer-14, Inner-12, Snubber-4

4. Outer-12, Inner-8, Snubber-4

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6. What is the complete AAR approval status of Class E and Class K bearings?

1. Same approval number

2. Class E: TIMKEN AP bearing with AAR approval nos. 1 & 1A; Class K: TIMKEN AP bearing with AAR approval nos. 27

3. Class E no approval

4. Class K no approval

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7. What is the complete designation structure for FAG bearings?

1. Same for both

2. TAROL6X11-U-JPE for Class E, TAROL6-1/2X9-U-JPK for Class K with different dimensions

3. Only Class E designation

4. Only Class K designation

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8. What is the complete comparison of journal size between Class E and Class K?

1. Same size

2. Class K journal size less than Class E, bore size more than Class E, roller density higher

3. Class K larger journal

4. Class E smaller bore

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9. What is the complete display requirement for axle box feeling instructions?

1. No display needed

2. Instructions displayed at axle box feeling points for guidance of technicians

3. Only verbal instructions

4. Only written in manual

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10. What is the complete requirement for axle box feeling procedure?

1. One technician

2. Two technicians (left and right), immediately after train arrival, feel adapter or underside of cup, use pyrometers, detach if >90°C

3. Only one technician

4. Only after cooling

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11. What are the complete temperature detection methods for incoming train examination?

1. Only touch

2. Touch adapter or cup with bare hands, use handheld pyrometers, back of palm feeling, pyrometers calibrated regularly

3. Only pyrometers

4. Only hand feeling

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12. What are the complete spring color coding practices?

1. No coding

2. Local color coding in practice, marking of colored band recommended for easy grouping

3. Only local coding

4. Only recommended coding

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13. What is the complete requirement for spring measurement in depots?

1. Visual inspection

2. Spring loaded dial gauges kept in spring section, may be kept in line with NKJ depot

3. Only manual measurement

4. No measurement needed

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14. What is the complete recommendation for spring stacking system?

1. Any stacking

2. 4-Tier system for easy placement and removal

3. 2-Tier system

4. No stacking needed

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15. What are the complete maintenance issues of springs addressed?

1. Only stacking

2. Stacking system (4-tier), spring loaded dial gauges for measurement, transportation trolleys, color coding/band marking, cleaning with wire brush

3. Only color coding

4. Only cleaning

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16. What are the complete handling requirements for wheelsets with CTRBs?

1. Any method

2. Proper lifting tackles, avoid wire slings for lifting, avoid wire ropes near bearing area while pulling wagons

3. Only avoid wire slings

4. Only use wire ropes

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17. What is the complete earthing requirement for welding on wagons with CTRBs?

1. No requirement

2. Earthing very close to welding area, wire tightly secured at both ends, or use earthing wire parallel to track instead of rails, all earthing ports properly grounded through calibrated earth pits

3. Only close to welding area

4. Only use rails for earthing

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18. What are the complete flange condition requirements for wheels to remain in service?

1. Any flange condition

2. Minimum thickness 16 mm, if worn to knife edge may be passed if radius not less than 5 mm, wheels with too small root radius not allowed

3. Only thickness requirement

4. Only radius requirement

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19. What is the complete requirement for wheel pairing and diameter variation?

1. No requirement

2. Variation as per IRCA Part III Clause 2.8.14.2, may require turning to smaller diameter for pairing

3. All wheels same diameter

4. Any variation allowed

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20. What are the complete tyre turning quality checks?

1. Only diameter

2. Check wheel gauge (1600+2/-1 mm), ensure variation in tread diameter on same axle not exceed 0.5 mm, check after turning

3. Only gauge check

4. Only diameter variation

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21. What is the complete re-axling procedure including preparation and checking?

1. Press wheels on

2. Clean wheel seat and bore, coat with white lead and linseed oil, use press with dial gauge, mount centrally at proper gauge, maintain recorder, check gauge frequently, stamp re-iscing particulars, apply rail gauge at multiple points

3. Only clean and press

4. Only stamp

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22. What are the complete adapter wear band conditions indicating problems?

1. Any wear band is bad

2. Wear bands extending to end of outer ring indicate worn adapter seat; shiny edge at extreme end indicates worn thrust shoulder - replace adapter

3. Only center wear bands are normal

4. No wear bands should exist

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23. What are the complete wheel identification markings?

1. Only R and L

2. Right side DV side marked with arrow in traffic red at top center line, right side = '2' in RFID, left side = '1', X and Y ends, RFID at Y end right and X end left, wheels R1-R4 and L1-L4 from X end facing right

3. Only arrow marking

4. Only RFID location

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24. What is the complete spring arrangement for BOXNHL?

1. Outer-12, Inner-8, Snubber-4

2. Outer-14, Inner-14, Snubber-4 with speed 90/70 and 75/65 km/h at different axle loads

3. Outer-14, Inner-12, Snubber-4

4. Outer-14, Inner-10, Snubber-4

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25. What are the complete speed variations for BOXNHA at different axle loads?

1. Same speed all loads

2. 20.32t: 100/100 km/h; 22.1t: 100/100 km/h; 22.82t: 100/75 km/h (empty/loaded)

3. 22.82t: 100/100 km/h

4. 20.32t: 75/75 km/h

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26. What is the complete spring arrangement for BOXNHA with IRF108HS at different axle loads?

1. Same for all loads

2. Outer-14, Inner-14, Snubber-4 for 20.32t, 22.1t, and 22.82t with different speeds

3. Changes with each load

4. Only one arrangement

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27. What are the complete operational parameters for Class K bearing design?

1. Only axle load

2. Track gauge 1676mm, axle load 25t, wheelset weight 1200kg, speed 130/100 km/h, run 500 km/day, wagon weight 20/100t, air brake, tread braking, braking force 18955kg, wheel dia 840/780mm, temp range -10 to 50°C, loaded:empty ratio 80:20

3. Only speed parameters

4. Only temperature range

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28. What is the complete formula context for fretting index?

1. Simple ratio

2. Based on formulas for bending and shear using bearing load, journal diameter, and length of inboard section of bearing

3. Only based on load

4. Only based on diameter

29 / 50

29. What are the complete dominating features that make Class K better than Class E?

1. Only higher load capacity

2. Lower fretting index (0.3 vs 1.0), higher L10 life (16 vs 10 Lac Km), low-torque seals, less flexure, fitted backing ring, polyamide cage, compact design, no seal wear ring, polymer spacer, premium rail grease

3. Only higher L10 life

4. Only lower fretting index

30 / 50

30. What is the complete definition of L10 life as provided in the document?

1. Average life of bearings

2. Number of hours in service that 90% of bearings will survive

3. Maximum life of bearings

4. Minimum life of bearings

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31. What is the complete marking scheme for CTRB overhauling status using cap screws?

1. No marking

2. POH: unpainted screws; 1st ROH: one golden yellow screw; 2nd ROH: two yellow screws; 3rd ROH: three yellow screws where applicable

3. Only painted screws

4. Only unpainted screws

32 / 50

32. What are the complete visual examination checks for bearings in ROH depots?

1. Only overheating check

2. Overheating, loose/missing cap screws, locking plate tabs bent, end cap damage from adapter, welding damage, cracked outer rings, loose backing ring, backing ring damage, grease seal displacement

3. Only cracked rings

4. Only loose screws

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33. What is the complete torque specification and procedure for end cap screws?

1. Tighten to any torque

2. Class E: 40 Kg-m, Class K: 58 Kg-m, torque wrench accuracy +/-4%, minimum 2 passes, maximum 5 passes

3. Only torque value

4. Only number of passes

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34. What are the complete recommended practices for CTRB in workshops?

1. Only cleaning

2. Controlled environment, 100% groove depth check, bearing machine calibration, journal diameter check, fillet radius check, proper screw tightening, thread checking, adapter gauging, cup wear pattern check, end play check, proper earthing, separate investigation, same make cups/cones, stamping, proper handling, periodic audits

3. Only screw tightening

4. Only earthing

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35. What are the complete conditions for wheels to be withdrawn from service?

1. Only reached condemning limits

2. Reached condemning limits, flat places/skidded, flanges sharp/deep/thin, insufficient root radius, gauge slack/tight, cracked or broken

3. Only flat places

4. Only cracks

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36. What is the complete welding procedure for center pivot reclamation?

1. Weld without preheating

2. Preheat up to 250°C, weld, cool slowly by covering with asbestos/sand

3. Weld and quench

4. Only grind

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37. What is the complete repair criteria for center pivot bowl?

1. Replace if worn

2. If 7mm thick shim can be inserted full depth between worn surface and gauge at any point on vertical wall, repairs should be carried out

3. If any wear visible

4. If gauge doesn't fit

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38. What are the complete spring arrangements for BOXN with different axle loads?

1. Only one arrangement

2. 20.32t: Outer-12, Inner-8, Snubber-4; 22.3t: Outer-14, Inner-10, Snubber-4; 22.8t: Outer-14, Inner-10, Snubber-4

3. Only 20.32t arrangement

4. Only 22.3t arrangement

39 / 50

39. What are the complete spring data dimensions for different CASNUB versions?

1. Only outer spring data

2. All versions (except CASNUB-22HS): Outer 26/260/245, Inner 16/262/247, Snubber 16/294/279; CASNUB-22HS: Outer 22/260/245, Inner 18/243/228, Snubber 18/293/278; CASNUB-22HS(Mod-I): Outer 21.5/253/238, Inner 16.5/225/210, Snubber 16.5/304/289

3. Only Mod-I data

4. Only HS data

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40. What are the complete spring grouping color bands for in-service CASNUB 22HS(Mod-I)?

1. I:253-250/225-222/304-301, II:250-247/222-219/301-298, III:247-244/219-216/298-295, IV:244-241/216-213/295-292, Red:241-238/213-210/292-289

2. Only three groups

3. Only four groups

4. Only five groups without values

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41. What are the complete spring grouping color bands for in-service CASNUB 22HS springs?

1. Only one band

2. I:260-257/243-240/293-290, II:257-254/240-237/290-287, III:254-251/237-234/287-284, IV:251-248/234-231/284-281, V:248-245/231-228/281-278

3. Only three bands

4. Only five bands without values

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42. What is the complete wheel numbering scheme for wagons?

1. R1-R4 on right, L1-L4 on left, starting from X end facing right side

2. Only right side numbered

3. Only left side numbered

4. Random numbering

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43. What are the complete wheel condemning diameters for different wagon types?

1. 906 mm for all

2. 906 mm for most, 950 mm for 22NLC, 780 mm for 25t and LWLH25

3. 780 mm for all

4. 1000 mm for all

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44. What are the complete wear limits for adapter crown lugs for different jaw types?

1. Same for all

2. Wide jaw: 156-164 mm (4mm), Narrow jaw: 155.5-163.5 mm (4mm), LCCF20(C): 156+2.75/-0.425 to 164 mm (4mm)

3. Only wide jaw specified

4. Only narrow jaw specified

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45. What are the complete assembly precautions for bogie?

1. Only spring matching

2. Spring matching within 3mm, avoid mixing old/new, select spring group and wheel dia for pivot drop <25mm, use packing as needed, lubricate pivot only

3. Only pivot lubrication

4. Only wheel selection

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46. What is the complete disassembly procedure for bogie?

1. Remove wheels first

2. Remove center pin shackle, disconnect rods, insert assembly pin, raise bolster, remove springs, remove wedges, lower bolster, slide bolster out, remove side frame key, remove wheel sets, remove spring plank

3. Remove springs first

4. Remove side frame first

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47. What is the complete reclamation procedure for CASNUB 22W(M) brake heads?

1. Weld and grind

2. Remove split pins, disengage adjuster, assemble new head, slide on beam, secure with pins and washers

3. Replace entire beam

4. Machine the head

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48. What are the complete criteria for condemning elastomeric pads and side bearer pads?

1. Only if cracked

2. Top/bottom plates cracked, rubber crack >50mm, bond failure >40mm, crushing, permanent set as per table

3. Only if rubber cracked

4. Only if set is exceeded

49 / 50

49. What are the complete axle load capacities for different bogie types?

1. Only 20.32t

2. 20.32t, 22.9t, 22.32t, 23.5t, 25t as per bogie type

3. Only 25t

4. Only 22.9t

50 / 50

50. What are the complete development stages of CASNUB bogies mentioned?

1. Only 22W and 22HS

2. 22W, 22W(M), 22NL, 22NLB, 22NLM, 22HS, 22HS(Mod-I), 22HS(Mod-II), 22NLC

3. Only 22NL and 22NLB

4. Only 22HS versions

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