RRB ALP (Assistant Loco Pilot) Trade-Specific / Relevant Trade (CBT Stage 2 Part B - Qualifying) Syllabus

Trade-Specific / Relevant Trade (CBT Stage 2 Part B - Qualifying) syllabus — full chapter and topic list

Expand any chapter to see its topics and sub-topics. This is the whole examinable outline for Trade-Specific / Relevant Trade (CBT Stage 2 Part B - Qualifying) in RRB ALP (Assistant Loco Pilot), not a summary of it.

1. 1

   Fitter Trade

   4 topics

   • Fitting and Bench Work
     • Filing, sawing and chipping
     • Marking and measuring tools
   • Drilling, Tapping and Threading
     • Drill bits and operations
     • Internal and external threads
   • Limits, Fits and Tolerances
     • Types of fits
   • Maintenance and Assembly
     • Bearings and lubrication
2. 2

   Electrician Trade

   4 topics

   • Wiring and Installation
     • Domestic and industrial wiring
     • Earthing systems
   • AC and DC Machines
     • Transformers
     • DC motors and generators
   • Electrical Measuring Instruments
     • Ammeter, voltmeter and multimeter
   • Cables, Protection and Safety
     • Fuses, MCB and relays
3. 3

   Electronics Mechanic Trade

   4 topics

   • Electronic Components
     • Resistors, capacitors and inductors
     • Diodes and transistors
   • Analog and Digital Electronics
     • Rectifiers and amplifiers
     • Logic gates and number systems
   • Measuring and Testing Instruments
     • CRO and signal generators
   • Soldering and Circuit Assembly
     • PCB and soldering techniques
4. 4

   Mechanic Diesel and Motor Vehicle Trades

   4 topics

   • Internal Combustion Engines
     • Two-stroke and four-stroke engines
     • Diesel engine components
   • Fuel and Cooling Systems
     • Fuel injection systems
     • Cooling and lubrication
   • Transmission and Brakes
     • Clutch and gearbox
     • Braking systems
   • Vehicle Maintenance
     • Servicing and troubleshooting
5. 5

   Diploma Engineering Streams (Mechanical/Electrical/Electronics/Automobile)

   4 topics

   • Mechanical Engineering Core
     • Thermodynamics and heat engines
     • Strength of materials
   • Electrical Engineering Core
     • Power systems and machines
     • Circuit theory
   • Electronics and Communication Core
     • Electronic devices and circuits
     • Communication systems
   • Automobile Engineering Core
     • Vehicle systems and dynamics

Trade-Specific / Relevant Trade (CBT Stage 2 Part B - Qualifying) flashcards for RRB ALP (Assistant Loco Pilot)

24 of 50 cards from the Trade-Specific / Relevant Trade (CBT Stage 2 Part B - Qualifying) deck — real questions with worked answers.

1. In fitting work, what is the difference between chipping and filing?

   Chipping is the removal of metal in chips using a chisel and hammer (rough metal removal). Filing is the removal of metal in small particles using a file to obtain a smooth, accurate finished surface.

2. What is the standard length of a hacksaw blade used in fitting, and how is its coarseness specified?

   The standard hacksaw blade length is 250–300 mm (10–12 in). Coarseness is specified by the number of teeth per 25 mm (TPI): 14, 18, 24, or 32 TPI; more teeth (finer) are used for thin/hard materials.

3. Which way should hacksaw teeth point, and on which stroke does cutting occur?

   The teeth point away from the handle (forward), and cutting occurs only on the forward stroke; pressure is released on the return stroke.

4. What is the included angle of a standard cold chisel cutting edge for general work?

   The cutting (point) angle of a flat cold chisel is about 60° for general-purpose work (hard materials use a larger angle, soft materials a smaller one).

5. Name the four common types of cold chisel used in fitting.

   Flat chisel, cross-cut (cape) chisel, half-round (round-nose) chisel, and diamond-point chisel.

6. What is a try square used for in bench work?

   A try square is used to check the squareness (90°) of surfaces and edges and to mark lines at right angles to an edge.

7. In drilling, give the standard point angle and the lip clearance angle for a twist drill cutting mild steel.

   Point (cutting) angle = 118° (i.e., 59° per lip), and the lip clearance angle is typically 8°–12°.

8. What is the purpose of tapping, and what is the difference between a tap and a die?

   Tapping cuts internal threads in a drilled hole. A tap cuts internal threads; a die cuts external threads (on a rod/bolt).

9. Name the three taps in a hand-tapping set and the order in which they are used.

   Taper (first) tap, intermediate (second) tap, and bottoming (plug/third) tap—used in that order; the taper tap starts the thread and the bottoming tap finishes threads to the bottom of a blind hole.

10. What is the tap-drill size formula for cutting an internal thread?

    Tap drill diameter = Major (nominal) diameter − Pitch. (e.g., for M10×1.5: 10 − 1.5 = 8.5 mm drill.)

11. What does the spindle speed (rpm) formula for drilling give, and state it?

    N = (1000 × V) / (π × D), where N = spindle speed in rpm, V = cutting speed in m/min, and D = drill diameter in mm.

12. Define 'limit', 'tolerance', and 'allowance' in the context of fits.

    Limits are the two extreme (max and min) permissible sizes of a dimension. Tolerance is the difference between the upper and lower limits. Allowance is the intentional difference between the dimensions of mating parts (clearance or interference).

13. What are the three basic types of fit between mating parts?

    Clearance fit (always a gap—shaft smaller than hole), interference (force) fit (shaft larger than hole—always overlap), and transition fit (may give either small clearance or small interference).

14. In the hole-basis system of fits, which member's size is held constant?

    In the hole-basis system, the hole size (lower deviation = zero) is kept constant and the fit is varied by changing the shaft size. It is preferred because holes are harder to machine to varied sizes.

15. What instrument is used to measure dimensions to 0.02 mm, and what is the principle behind it?

    A vernier caliper, which works on the vernier principle—the difference between one main-scale division and one vernier-scale division gives the least count (commonly 0.02 mm).

16. State the least count formula for a micrometer screw gauge with a pitch of 0.5 mm and 50 thimble divisions.

    Least count = Pitch / Number of thimble divisions = 0.5 / 50 = 0.01 mm.

17. What is the difference between maintenance terms 'breakdown maintenance' and 'preventive maintenance'?

    Breakdown maintenance is repair done only after a machine fails. Preventive maintenance is planned, scheduled servicing (lubrication, inspection, part replacement) done to prevent failure before it occurs.

18. During assembly, what is the function of a dowel pin versus a bolt?

    A dowel pin precisely locates/aligns two parts relative to each other (positioning), while a bolt clamps/holds them together (fastening).

19. What does 'electrical wiring system' classification by concealment include?

    Surface (open) wiring such as cleat, batten (CTS/TRS), conduit on surface; and concealed wiring where conduits/cables run inside walls. Common modern types: casing-capping, surface conduit, and concealed conduit wiring.

20. What is the purpose of earthing (grounding) in an electrical installation?

    Earthing provides a low-resistance path to ground for leakage/fault current, protecting people from electric shock and equipment from damage, and ensures protective devices (fuses/MCBs) operate correctly.

21. State the basic working principle of a DC motor.

    When a current-carrying conductor is placed in a magnetic field, it experiences a mechanical force (Fleming's left-hand rule); this force produces rotation of the armature in a DC motor.

22. State the basic working principle of a DC generator and the rule used to find current direction.

    A DC generator works on electromagnetic induction (Faraday's law): an EMF is induced when a conductor cuts magnetic flux. The direction of induced current is found by Fleming's right-hand rule.

23. What is the main constructional difference between an AC motor (induction) and a DC motor?

    A DC motor has a commutator and brushes to reverse armature current; a 3-phase induction (AC) motor has no commutator—it uses a rotating magnetic field in the stator and a squirrel-cage or wound rotor without electrical connection to the rotor.

24. What is the EMF equation of a transformer?

    E = 4.44 × f × N × Φm, where E = induced EMF (volts), f = frequency (Hz), N = number of turns, and Φm = maximum flux (Wb).

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