quiz easy

Carriage & Wagon Theory for LDCE(Mech)

easy ICF BMBS

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1. What must be done with all flexible hose pipes during every POH (Periodical Overhaul)?

1. They must be painted

2. They must be cut to a shorter length

3. They must be tested

4. They must be replaced with metal pipes

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2. According to the comparison table, what is the wear rate of brake blocks in the bogie-mounted system?

1. 3 cc/kwh

2. 1.325 cc/kwh

3. 2.5 cc/kwh

4. 0.5 cc/kwh

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3. If the red resetting mark on the adjusting tube appears, what is the immediate course of action regarding the brake blocks?

1. No action is needed

2. The brake blocks must be replaced with new ones

3. The brake blocks must be lubricated

4. The brake blocks must be filed down

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4. What is the function of the hand brake trunnion fitted on the brake cylinder?

1. To increase the braking force during service applications

2. To provide an attachment point for the hand brake

3. To automatically release the brakes

4. To drain moisture from the cylinder

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5. During the initial fitment of the pull rod with new wheels and blocks, which holes should be used for connection?

1. The middle holes

2. The adjacent holes

3. The extreme holes

4. Any available holes

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6. The material code for a non-asbestos 'K' type brake block is:

1. KA

2. CI

3. K

4. KNA

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7. What is the part number of the sketch for the brake cylinder's testing layout?

1. SK-81204

2. SK-81206

3. SK-98108

4. SK-98066

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8. The curved profile pull rods are provided with holes for adjustment. How many holes do they have?

1. One hole at both ends

2. One hole at one end and two holes at the other end

3. Two holes at both ends

4. Three holes at both ends

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9. In the brake cylinder, which item is directly responsible for locking the adjusting mechanism during release?

1. The piston

2. The release spring

3. The pawl

4. The dome cover

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10. What is the part number of the RDSO sketch that details the 203mm air brake cylinder with slack adjuster?

1. SK-81057

2. SK-81200

3. SK-98066

4. T-3-2-802

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11. Which component is NOT a benefit of composite brake blocks mentioned in the document?

1. Reduced braking distance

2. Increased weight of the coach

3. Reduction in replacement of brake blocks

4. Reduced noise during braking

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12. During assembly, what torque should be used to tighten the Allen screws securing the piston?

1. 100 kg·cm

2. 150 kg·cm

3. 200 kg·cm

4. 250 kg·cm

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13. In the operation test, how many times should the piston be operated at full stroke to test all ratchet teeth?

1. 5 times

2. 10 times

3. 15 times

4. At least 18 times

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14. During the leakage test, what is the maximum permissible pressure drop in 10 minutes?

1. 0.5 kg/cm²

2. 0.2 kg/cm²

3. 0.1 kg/cm²

4. 1.0 kg/cm²

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15. The piston and piston trunk sub-assembly are:

1. Interchangeable with any other cylinder

2. Made of plastic

3. A matched pair and are not interchangeable

4. Lubricated with water

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16. How many people are recommended to safely dismantle the front cover of the brake cylinder?

1. One person is enough

2. At least two persons

3. Three persons

4. Four persons

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17. What serious force must be kept in mind while dismantling the brake cylinder?

1. The force of the ratchet spring (approx. 10 kg)

2. The force of the release spring (approx. 60 kg)

3. The air pressure (approx. 7 kg/cm²)

4. The weight of the piston

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18. At what wheel diameter must the pull rod connection be shifted to the adjacent hole?

1. 915 mm

2. 915 mm

3. 839 mm

4. 800 mm

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19. Under new wheel and brake block conditions, what gap should be maintained between the block and the wheel?

1. 32 mm

2. 15 mm

3. 10 mm

4. About 5 mm

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20. What must be ensured about the levers of Non-AC and AC coaches?

1. They are interchangeable

2. They must be lubricated daily

3. They must not be mixed under any circumstances

4. They are made of plastic

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21. Why are flexible hoses used to connect the distributor valve outlet to the bogie pneumatic line?

1. To reduce the cost

2. To provide flexibility for dynamic movement of the bogie

3. To increase air pressure

4. To make installation easier

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22. What is the piston take-up stroke of the brake cylinder?

1. 305 mm

2. 95 mm

3. 32 mm

4. 15 mm

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23. For Non-AC coaches (13T bogies), what is the total mechanical advantage per bogie?

1. 8.4

2. 7.644

3. 32

4. 305

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24. Which component is eliminated in the bogie-mounted system compared to the standard air brake system?

1. Distributor valve

2. Brake pipe

3. External slack adjuster

4. Auxiliary reservoir

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25. What is the braking distance for an 18-coach train at 110 kmph with the bogie-mounted brake system?

1. 905 m

2. 800 m

3. 850 m

4. 750 m

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26. How many pin joints are there per coach in the conventional underframe mounted system?

1. 51

2. 84

3. 102

4. 200

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27. What does a red paint mark on the adjusting tube assembly indicate?

1. The brake blocks are new

2. The piston unit has extended over its full range and requires resetting

3. The brake cylinder is fully charged

4. There is an air leak

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28. During brake release, where does the air from the brake cylinder go?

1. Back to the main reservoir

2. To the auxiliary reservoir

3. To the brake pipe

4. To the atmosphere

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29. What is the maximum brake cylinder pressure developed in this system?

1. 2.5 +/- 0.1 kg/cm²

2. 5.0 +/- 0.1 kg/cm²

3. 3.8 +/- 0.1 kg/cm²

4. 7.0 +/- 0.1 kg/cm²

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30. In the working principle, what causes the brake cylinder piston to move outward during application?

1. Release spring force

2. Pneumatic pressure from the distributor valve

3. Mechanical force from the hand brake

4. Gravity

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31. The use of which material is PROHIBITED in the manufacturing of non-asbestos 'K' type blocks?

1. Graphite

2. Asbestos

3. Rubber

4. Steel

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32. What is the approximate weight of a 'K' type composite brake block?

1. 3 kg

2. 5 kg

3. 7 kg

4. 9 kg

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33. Up to what maximum speed are 'K' type brake blocks suitable for use?

1. 110 KMPH

2. 120 KMPH

3. 130 KMPH

4. 140 KMPH

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34. What is the average coefficient of friction for 'K' type composite brake blocks?

1. 0.12

2. 0.14

3. 0.25

4. 0.35

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35. What type of brake blocks are used in the bogie-mounted brake system?

1. Cast Iron brake blocks

2. L' type low friction composite blocks

3. K' type high friction composite brake blocks

4. Wooden brake blocks

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36. What is the total adjustment capacity of the brake cylinder's slack adjuster?

1. 32 mm

2. 95 mm

3. 305 mm

4. 915 mm

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37. What is the function of the built-in single-acting slack adjuster in the brake cylinder?

1. To increase the braking force

2. To take up the slack created between the wheel and brake block due to wear

3. To lubricate the brake rigging

4. To automatically apply the hand brake

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38. Where are the brake cylinders mounted in this system?

1. On the underframe of the coach

2. Inside the driver's cabin

3. On either side of the bogie frame

4. On the axle box

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39. How many brake cylinders are provided per coach in the bogie-mounted brake system?

1. Two of 14" size

2. Two of 8" size

3. Four of 14" size

4. Four of 8" size

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40. What is the primary reason for introducing the bogie-mounted air brake system?

1. To increase the coach's weight

2. To overcome problems of slack adjuster failure and issues with cast iron brake blocks

3. To simplify the brake rigging with more pin joints

4. To reduce the number of brake cylinders per coach

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