Quiz easy

Carriage & Wagon Theory for LDCE(Mech)

easy icf train lighting

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1. What instrument is recommended for monitoring the condition of bearings during maintenance?

1. A multimeter

2. A thermometer

3. A shock pulse meter

4. A tachometer

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2. What does the abbreviation 'MFO' stand for in the context of the alternator?

1. Maximum Frequency Output

2. Minimum speed for Full Output

3. Main Fuse Open

4. Magnetic Field Orientation

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3. What is the purpose of the anti-theft rods in the battery box?

1. To hold the batteries in place

2. To provide a path for electric current

3. To prevent the batteries from being stolen

4. To hang tools on during maintenance

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4. Which make of bearings is recommended for use in alternators?

1. Local market bearings

2. SKF/FAG

3. Timken only

4. NSK only

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5. During POH, what should be done with the old V-belts removed from service?

1. They should be kept as spares

2. They should be sold

3. They should be destroyed

4. They should be cleaned and stored

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6. What should be done with a fan if its commutator surface is grooved or pitted?

1. Clean it with sandpaper

2. Replace the fan with an overhauled one

3. Apply grease to the commutator

4. Tighten the fan blades

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7. What is the correct swing of a carriage fan?

1. 200 mm

2. 300 mm

3. 400 mm

4. 600 mm

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8. When should the battery be isolated while testing an alternator with a portable motor drive?

1. Never

2. Only if the voltage is high

3. Yes, the battery should be isolated

4. Only for AC coaches

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9. In a monthly schedule, what should be used to clean the inside of a regulator?

1. A wet cloth

2. A wire brush

3. A portable blower to blow out dust

4. High-pressure water

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10. What is the primary advantage of a VRLA battery over a conventional flooded battery?

1. It is cheaper

2. It has a higher voltage

3. It is Sealed Maintenance Free (SMF)

4. It generates more power

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11. What is the correct material for packing cells in a battery box?

1. Untreated plywood

2. Hard wood coated with acid-resistant paint

3. Mild steel sheets

4. Rubber sheets

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12. What is the specific gravity range for a fully charged conventional cell?

1. 1100 to 1150

2. 1170 to 1190

3. 1210 to 1220

4. 1250 to 1300

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13. During battery maintenance, what should be used to replenish low electrolyte levels?

1. Tap water

2. Acid solution

3. Distilled water

4. Mineral water

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14. What is the purpose of the Rotary Junction Box (RJB)?

1. To connect the alternator to the battery

2. To arrange and control power supply to various coach circuits

3. To provide emergency lighting

4. To house the train's communication system

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15. What is the correct action if a fan does not start when the tumbler switch is on, but starts when the switch terminals are shorted?

1. The fan motor is defective

2. The wiring to the fan is broken

3. The controlling tumbler switch is defective

4. The fuse is blown

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16. The MFO (minimum speed for full output) for a 4.5 kW alternator should not be more than?

1. 357 rpm

2. 600 rpm

3. 1500 rpm

4. 2500 rpm

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17. What is the recommended grease for alternator bearings during POH?

1. Any multi-purpose grease

2. Graphite grease

3. Servo Gem (RR-3)

4. Lithium grease

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18. What should be done if a fuse is found blown?

1. Replace it with a higher gauge fuse wire

2. Bypass it with a wire to restore supply

3. Try to find the cause of the fault before replacing

4. Ignore it if the equipment is working

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19. What type of fuse must always be used for the field circuit?

1. A re-wirable fuse with tinned copper wire

2. A higher gauge fuse wire

3. An HRC fuse of specified value

4. Any available fuse

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20. During the Half Yearly Schedule, what must be done with the existing V-belts?

1. They must be turned inside out

2. They must be cleaned with soap and water

3. They must be replaced with new belts

4. They must be coated with grease

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21. What is the purpose of marking different cells as 'pilot cells' every month?

1. To identify which cells to replace first

2. To ensure the true condition of the whole battery is reflected

3. To make it easier to add distilled water

4. To track the manufacturing date of the cells

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22. What should be applied to inter-cell and end-cell connections to protect them from corrosion?

1. Grease

2. Engine oil

3. Petroleum jelly

4. Paint

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23. A coach with which type of earth fault is strictly prohibited from being put into service?

1. Negative earth

2. Positive earth

3. Chassis earth

4. Neutral earth

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24. What is the allowable maximum voltage drop between the battery and the farthest light point with full load on?

1. 1.0 V

2. 3.0 V

3. 5.0 V

4. 10.0 V

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25. What is the minimum acceptable insulation resistance for a coach under fair weather conditions?

1. 0.5 Mega-ohm

2. 1 Mega-ohm

3. 2 Mega-ohms

4. 10 Mega-ohms

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26. With which voltage megger should insulation tests be carried out?

1. 100 V

2. 230 V

3. 440 V

4. 500 V

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27. What must be done with new V-belts after the coach completes its first trip?

1. They must be replaced

2. They must be re-tightened

3. They must be oiled

4. They must be checked for overturning only

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28. How can you tell if an axle pulley is tight by sound?

1. A dull sound

2. A clean metallic sound

3. A squeaking sound

4. No sound at all

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29. What should you check for on the axle pulley to ensure it hasn't slipped?

1. The color of the pulley

2. The tension of the belt

3. An indicating white mark

4. The temperature of the pulley

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30. To what torque should the axle pulley bolts be tightened?

1. 10 kgm

2. 20 kgm

3. 30 kgm

4. 40 kgm

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31. What should be done if the alternator has lost its residual magnetism?

1. Replace the alternator immediately

2. Give a 12V DC flash to the field terminals

3. Increase the belt tension

4. Change the field fuse

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32. Before commencing maintenance on a rake, what must be clamped to the rail?

1. A red flag

2. A caution board

3. A short circuiting lead

4. A 'Do Not Disturb' sign

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33. What is the wattage of the Fluorescent Tube Light (FTL) used in the coaches?

1. 40 Watt

2. 25 Watt

3. 20 Watt

4. 15 Watt

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34. What is the purpose of the Emergency Feed Terminals (EFT)?

1. To charge the battery from an external source

2. To feed supply to an adjacent 'dark' coach in an emergency

3. To control the power supply to fan circuits

4. To earth the coach during maintenance

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35. What does the abbreviation 'BCT' stand for?

1. Battery Charging Terminal

2. Brushless Current Transformer

3. Brake Cylinder Tester

4. Bulk Charging Transistor

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36. Which type of battery is also known as a Sealed Maintenance Free (SMF) battery?

1. Flooded Lead Acid

2. Mono block

3. VRLA

4. Ni-Cd

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37. What is the primary function of the Rectifier-cum-Regulator Unit (RRU)?

1. To only charge the battery

2. To convert DC to AC

3. To rectify AC to DC and regulate voltage/current

4. To provide emergency power

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38. The 4.5 kW brushless alternator is driven by how many 'V' belts?

1. 2

2. 4

3. 6

4. 12

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39. What is the rating of the brushless alternator used on Non-AC BG coaches?

1. 18 kW

2. 4.5 kW

3. 25 kW

4. 22.75 kW

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40. Which of the following is NOT a train lighting system used on Indian Railways BG coaching stock?

1. End On Generation (EOG)

2. Self Generation (SG)

3. Mid On Generation (MOG)

4. Pantograph Generation (PG)

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