Quiz medium

Carriage & Wagon Theory for LDCE(Mech)

medium wagon underframe

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1. What specific RDSO drawing shows repair of damaged center sills?

1. WD-94047-S-1

2. WD-99031-S-1

3. WD-95010-S-1

4. WD-81035-S-19

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2. What additional work is done in workshops during POH/NPOH besides sickline work?

1. Only painting

2. Inspection, cleaning, floor plate repairs, brake van underframe, bogie wagon underframe, painting

3. Only cleaning

4. Only floor plate repairs

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3. What is done for vertical cracks according to sickline maintenance?

1. Drilled at both ends

2. Patching is done to strengthen the cracked portion

3. Ignored

4. Cut out completely

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4. What should be done for stocks having chronic failure of main members?

1. Scrap the wagon

2. Strengthen these members and provide cast steel/fabricated knees and brackets

3. Reduce load

4. Reduce speed

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5. What happens if buffers become dead (springs ineffective)?

1. Nothing

2. Buffing load will be directly taken by underframe members leading to extensive damage

3. Brakes fail

4. Wagon derails

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6. What should be checked about buffer sub-assemblies and draw gear?

1. Their color

2. They should be within prescribed minimum and maximum dimensions

3. Their weight

4. Their material

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7. What modification was done to prevent cracks in centre sill of BTPN wagons?

1. Strengthening of doors

2. Modifications vide RB letter No. 2015/M(N)/951/17 dated 17.12.2018

3. New braking system

4. Wheel replacement

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8. When was the procedure for re-cambering BRN/BRNA/BRNAHS issued?

1. 07.01.1999

2. 31.03.1999

3. 03.07.2015

4. 17.12.2018

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9. What modification was done for BVZC brake van axle guard?

1. Replacement

2. Provision of stiffener angle

3. Removal

4. Strengthening with chains

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10. What drawing number was issued for BVZI guard seat?

1. WD-81035-S-19

2. WD-04059-S-01

3. WD-11065-S-01

4. WD-95010-S-1

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11. What was done to the bottom footstep of old BVZI wagon by maintenance depots?

1. Reinforced

2. Cut

3. Painted

4. Greased

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12. When was the new unitized design CP top bracket for BVZI issued for compulsory replacement during POH/ROH?

1. 25.01.2011

2. 29.12.2011

3. 27.05.94

4. 23.11.93

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13. What was the problem with BVZI CP top bracket that required modification?

1. Corrosion

2. Frequent failure in service

3. Wrong size

4. Too expensive

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14. Why is no heating required in the brake van straightening method?

1. It is not effective

2. To avoid damages to steel structure that may occur from heating

3. It takes too long

4. Heating is expensive

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15. What method is described for straightening drooping ends of brake van underframe?

1. Heating and hammering

2. Hold main members with screw couplings and raise ends with screw jacks, no heating

3. Replace the ends

4. Add weight to center

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16. What is the current approved practice for floor plate attachment in workshops?

1. Riveting only

2. Welding as an alternative to riveting

3. Bolting

4. Adhesive bonding

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17. Where does pitting/corrosion occur on sole bars of open wagons?

1. At ends

2. At doorways

3. At center

4. Near bogies

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18. Which type of wagon gets damaged more often according to experience?

1. Covered wagons

2. Open wagons

3. Tank wagons

4. Flat wagons

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19. What diameter should additional rivets for patches be?

1. Not less than 8 mm

2. Not less than 10 mm

3. Not less than 12 mm

4. Not less than 15 mm

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20. If both inner and outer patches cannot be fitted, what is the requirement for single patch thickness?

1. Half of parent material

2. Not less than thickness of parent material

3. Twice the parent material

4. Any thickness

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21. What are the requirements for an inner patch on sole bar?

1. Smaller than outer patch

2. Cover full depth of channel and same length as outer patch to extent possible

3. Cover only the web

4. Any size

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22. What are the requirements for an outer patch on sole bar?

1. Cover only the crack

2. Cover full depth of web and full width of crack flange

3. Cover only the flange

4. Cover only the web

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23. How are slightly bent solebars repaired?

1. Replaced completely

2. Local heating and straightening

3. Hammering cold

4. Left as is

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24. What is the complete method for repairing a damaged sole bar portion?

1. Weld the crack only

2. Cut entire portion and graft new portion with double flanged U-shaped patch and back plate

3. Apply patch over existing

4. Hammer straight

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25. Where does damage to sole bar generally occur?

1. At the center

2. At locations adjacent to headstock stanchions at the door location

3. At the ends only

4. Near the bogie pivot

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26. What material is used for new wagon solebars made from CRF sections?

1. Mild steel

2. IRSM-44 or micro-alloyed steel

3. Cast iron

4. Aluminum

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27. What material is used for sole bars on BOXNCR wagons?

1. Copper-bearing mild steel

2. IRSM-41 carbon steel

3. Stainless steel

4. Aluminum

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28. What is removed before straightening a bent headstock?

1. The entire wagon

2. Buffer assembly and floor plate if necessary

3. Only the paint

4. The wheels

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29. How is cleaning and de-rusting of underframe carried out?

1. With water only

2. By scraping and hammering after wagon is on trestles

3. With chemical cleaners only

4. By sandblasting only

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30. What is checked regarding underframe alignment?

1. Only length

2. Proper alignment and any deflection like sagging or buckling at various planes

3. Only width

4. Only height

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31. What is the complete procedure for repairing a horizontal crack?

1. Weld immediately

2. Drill at both ends, gauge out cracked portion, and weld

3. Cover with patch

4. Ignore if small

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32. What items specifically should be checked for looseness during underframe inspection?

1. All bolts

2. Rivets/Lock bolts of axle guard, scroll irons, headstock, stanchions, and knees

3. Only headstock rivets

4. Only axle guard rivets

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33. What pamphlet provides the procedure for re-cambering BRN/BRNA/BRNHS wagons?

1. G-72

2. G-107

3. WM-74002

4. WM-74003

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34. What RDSO drawing shows modifications to arrest BRN wagon failures?

1. WD-94047-S-1

2. WD-95010-S-1, S-2 and S-3

3. WD-99031-S-1

4. WD-81035-S-19

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35. What specific problem was noticed in BRN wagons within first POH period?

1. Wheel damage

2. Breakage/detachment of fixed ends/headstock and sagging of sole bar/center girder

3. Brake failure

4. Door problems

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36. In BOXN underframe, what is the cross bar at overhang made of?

1. 5/8 mm plate

2. ISMC 250×82×9

3. ISMC 100×50×5

4. 10 mm pressing

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37. What is the duty of supervisors regarding underframe inspection at POH?

1. Only visual check

2. Ensure thorough inspection, major repairs, and defects are given meticulous attention

3. Only document review

4. Only check paint condition

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38. What are the other major sub-assemblies fitted to the underframe?

1. Only draw gear

2. Draw gear, container locks, side stanchions, door operating mechanism, top center pivot

3. Only door mechanism

4. Only container locks

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39. What alignment accuracy is required for butting faces of two courses before welding?

1. ±3 mm

2. ±2 mm

3. ±1 mm

4. ±0.5 mm

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40. What is the tolerance for length of non-pressure tank wagon barrel measured over the center of the two dished ends?

1. ±3 mm

2. ±5 mm

3. +10/-3 mm

4. +5/-0 mm

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41. What is the coupler height tolerance from bogie top pivot when bogies are free supply items?

1. +0/-5 mm

2. +0/-3 mm

3. ±3 mm

4. ±5 mm

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42. What is the tolerance for distance between door center line to center line of door hinge?

1. ±3 mm

2. ±2 mm

3. ±1.5 mm

4. ±1 mm

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43. What is the tolerance for distance between stanchions on body end?

1. ±3 mm

2. ±2 mm

3. ±1.5 mm

4. ±1 mm

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44. What is the tolerance for distance between bogie pivot centers in welded construction?

1. ±3 mm

2. 5/-2 mm

3. ±2 mm

4. +0/-3 mm

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45. What is the tolerance for difference between diagonals of door opening?

1. 5 mm

2. 4 mm

3. 3 mm

4. 2 mm

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46. What is the tolerance for inside length in riveted construction?

1. 7/-3 mm

2. ±5 mm

3. ±3 mm

4. +5/-0 mm

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47. What was used for joining underframe members in earlier wagons?

1. Welding only

2. Riveting

3. Bolting

4. Adhesives

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48. What sections are generally used for center sills?

1. Channel sections only

2. Z-Sections

3. I-sections

4. Circular sections

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49. What is the complete list of main members of a typical conventional BG wagon underframe?

1. Sole bars and headstock only

2. Sole bars, headstock, longitudinal, crossbars, bolster, floor, crib angle, end angle, gusset plates and knees, centre sill

3. Only crossbars and bolsters

4. Only floor and end angle

50 / 50

50. What factors are taken into account when designing an underframe according to the document?

1. Only the weight of the wagon

2. Quantum and pattern of loading, track considerations, buffing loads, and shunting speeds

3. Only the length of the wagon

4. Only the type of paint used

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