**The SSC Junior Engineer Civil Syllabus 2023 for Tier 2 is given below:**

Building Materials: Physical and Chemical properties, classification, standard tests, use, and manufacture/quarrying of materials e.g. building stones, silicate-based materials, cement (Portland), asbestos products, timber, and wood-based products, laminates, bituminous materials, paints, varnishes.

Estimating, Costing, and Valuation: estimate, glossary of technical terms, analysis of rates, methods, and unit of measurement, Items of work – earthwork, Brick work (Modular & Traditional bricks), RCC work, Shuttering, Timber work, Painting, Flooring, Plastering. Boundary wall, Brick building, Water Tank, Septic tank, Bar bending schedule, Centre line method, Mid-section formula, Trapezoidal formula, Simpson’s rule. Cost estimate of Septic tank, flexible pavements, Tube well, isolates and combined footings, Steel Truss, Piles, and pile-caps. Valuation – Value and cost, scrap value, salvage value, assessed value, sinking fund, depreciation and obsolescence, methods of valuation.

Surveying: Principles of surveying, measurement of distance, chain surveying, working of the prismatic compass, compass traversing, bearings, local attraction, plane table surveying, theodolite traversing, adjustment of theodolite, Levelling, Definition of terms used in leveling, contouring, curvature and refraction corrections, temporary and permanent adjustments of dumpy level, methods of contouring, use of a contour map, techo metric survey, curve setting, earthwork calculation, advanced surveying equipment.

Soil Mechanics: Origin of soil, phase diagram, Definitions-void ratio, porosity, degree of saturation, water content, the specific gravity of soil grains, unit weights, density index and interrelationship of different parameters, Grain size distribution curves and their uses. Index properties of soils, Atterberg’s limits, ISI soil classification, and plasticity chart. Permeability of soil, coefficient of permeability, determination of coefficient of permeability, Unconfined and confined aquifers, effective stress, quick sand, consolidation of soils, Principles of consolidation, degree of consolidation, pre-consolidation pressure, normally consolidated soil, e-log p curve, computation of ultimate settlement. Shear strength of soils, direct shear test, Vane shear test, Triaxial test. Soil compaction, Laboratory compaction test, Maximum dry density, and optimum moisture content, earth pressure theories, active and passive earth pressures, Bearing capacity of soils, plate load test, and standard penetration test.

Hydraulics: Fluid properties, hydrostatics, measurements of flow, Bernoulli’s theorem and its application, flow through pipes, flow in open channels, weirs, flumes, spillways, pumps, and turbines.

Irrigation Engineering: Definition, necessity, benefits, 2II effects of irrigation, types, and methods of irrigation, Hydrology – Measurement of rainfall, run off coefficient, rain gauge, losses from precipitation – evaporation, infiltration, etc. Water requirement of crops, duty, delta and base period, Kharif and Rabi Crops, Command area, Time factor, Crop ratio, Overlap allowance, Irrigation efficiencies. Different types of canals, types of canal irrigation, and loss of water in canals. Canal lining – types and advantages. Shallow and deep to wells, the yield from a well. Weir and barrage, Failure of weirs and permeable foundation, Slit, and Scour, Kennedy’s theory of critical velocity. Lacey’s theory of uniform flow. Definition of flood, causes, and effects, methods of flood control, water logging, preventive measure. Land reclamation, Characteristics affecting fertility of soils, purposes, methods, description of the land, and reclamation processes. Major irrigation projects in India.

Transportation Engineering: Highway Engineering – cross-sectional elements, geometric design, types of pavements, pavement materials – aggregates and bitumen, different tests, Design of flexible and rigid pavements – Water Bound Macadam (WBM) and Wet Mix Macadam (WMM), Gravel Road, Bituminous construction, Rigid pavement joint, pavement maintenance, Highway drainage, Railway Engineering- Components of the permanent way – sleepers, ballast, fixtures and fastening, track geometry, points and crossings, track junction, stations, and yards. Traffic Engineering – Different traffic survey, speed-flow-density, and their interrelationships, intersections, interchanges, traffic signals, traffic operation, traffic signs and markings, and road safety.

Environmental Engineering: Quality of water, source of water supply, purification of water, distribution of water, need of sanitation, sewerage systems, circular sewer, oval sewer, sewer appurtenances, sewage treatments. Surface water drainage. Solid waste management – types, effects, engineered management system. Air pollution – pollutants, causes, effects, control. Noise pollution – cause, health effects, control.

Theory of structures: Elasticity constants, types of beams – determinate and indeterminate, bending moment and shear force diagrams of simply supported, cantilever, and overhanging beams. Moment of area and moment of inertia for rectangular & circular sections, bending moment and shear stress for tee, channel, and compound sections, chimneys, dams and retaining walls, eccentric loads, slope deflection of simply supported and cantilever beams, critical load and columns, Torsion of circular section.

Concrete Technology: Properties, Advantages, and uses of concrete, cement aggregates, the importance of water quality, water-cement ratio, workability, mix design, storage, batching, mixing, placement, compaction, finishing, and curing of concrete, quality control of concrete, hot weather and cold weather concreting, repair and maintenance of concrete structures.

RCC Design: RCC beams-flexural strength, shear strength, bond strength, design of singly reinforced and double reinforced beams, cantilever beams. T-beams, lintels. One-way and two-way slabs, isolated footings. Reinforced brickworks, columns, staircases, retaining walls, and water tanks (RCC design questions may be based on both Limit State and Working Stress methods).

Steel Design: Steel design and construction of steel columns, beams roof trusses plate girders.

### SSC JE Tier 2 Syllabus 2023 for Electrical Engineering

The SSC Junior Engineer Syllabus 2023 for Electrical Engineering is given below:

Basic concepts: Concepts of resistance, inductance, capacitance, and various factors affecting them. Concepts of current, voltage, power, energy, and their units.

Circuit law: Kirchhoff’s law, Simple Circuit solution using network theorems.

Magnetic Circuit: Concepts of flux, MMF, reluctance, Different kinds of magnetic materials, Magnetic calculations for conductors of different configurations e.g. straight, circular, solenoidal, etc. Electromagnetic induction, self, and mutual induction.

AC Fundamentals: Instantaneous, peak, R.M.S. and average values of alternating waves, Representation of sinusoidal wave form, simple series and parallel AC Circuits consisting of R.L. and C, Resonance, Tank Circuit. Poly Phase system – star and delta connection, 3 phase power, DC, and sinusoidal response of R-Land R-C circuit.

Measurement and measuring instruments: Measurement of power (1 phase and 3 phase, both active and re-active) and energy, 2 wattmeter method of 3 phase power measurement. Measurement of frequency and phase angle. Ammeter and voltmeter (both moving oil and moving iron type), an extension of range wattmeter, Multimeters, Megger, Energy meter AC Bridges. Use of CRO, Signal Generator, CT, PT, and their uses. Earth Fault detection.

Electrical Machines: (a) D.C. Machine – Construction, Basic Principles of D.C. motors and generators, their characteristics, speed control, and starting of D.C. Motors. Method of braking motor, Losses, and efficiency of D.C. Machines. (b) 1-phase and 3-phase transformers – Construction, Principles of operation, equivalent circuit, voltage regulation, O.C., and S.C. Tests, Losses, and efficiency. Effect of voltage, frequency, and waveform on losses. Parallel operation of 1-phase/3 phase transformers. Auto transformers. (c) 3-phase induction motors, rotating magnetic field, the principle of operation, equivalent circuit, torque-speed characteristics, starting and speed control of 3-phase induction motors. Methods of braking, the effect of voltage and frequency variation on torque speed characteristics.

Fractional Kilowatt Motors and Single Phase Induction Motors: Characteristics and applications.

Synchronous Machines: Generation of 3-phase E.M.F. armature reaction, voltage regulation, parallel operation of two alternators, synchronizing, and control of active and reactive power. Starting and applications of synchronous motors.

Generation, Transmission, and Distribution: Different types of power stations, Load factor, diversity factor, demand factor, cost of generation, and interconnection of power stations. Power factor improvement, various types of tariffs, types of faults, and short circuit current for symmetrical faults. Switchgears – rating of circuit breakers, Principles of arc extinction by oil and air, H.R.C. Fuses, Protection against earth leakage / over current, etc. Buchholtz relay, Merz-Price system of protection of generators & transformers, protection of feeders and bus bars. Lightning arresters, various transmission and distribution systems, comparison of conductor materials, and the efficiency of a different system. Cable – Different types of cables, cable ratings, and derating factors.

Estimation and costing: Estimation of lighting scheme, electric installation of machines, and relevant IE rules. Earthing practices and IE Rules.

Utilization of Electrical Energy: Illumination, Electric heating, Electric welding, Electroplating, Electric drives, and motors.

Basic Electronics: Working of various electronic devices e.g. P N Junction diodes, Transistors (NPN and PNP type), BJT, and JFET. Simple circuits using these devices.

### SSC JE Tier 2 Syllabus 2023 for Mechanical Engineering

The SSC Junior Engineer Syllabus 2023 for Mechanical Engineering is given below:

Theory of Machines and Machine Design: Concept of a simple machine, Four bar linkage and link motion, Flywheels and fluctuation of energy, Power transmission by belts – V-belts and Flat belts, Clutches – Plate and Conical clutch, Gears – Type of gears, gear profile and gear ratio calculation, Governors – Principles and classification, Riveted joint, Cams, Bearings, Friction in collars and pivots.

Engineering Mechanics and Strength of Materials: Equilibrium of Forces, Law of motion, Friction, Concepts of stress and strain, Elastic limit and elastic constants, Bending moments and shear force diagram, Stress in composite bars, Torsion of circular shafts, Bucking of columns – Euler’s and Rankin’s theories, Thin walled pressure vessels.

Properties of Pure Substances: p-v & P-T diagrams of pure substance like H2O, Introduction of steam table with respect to steam generation process; definition of saturation, wet & superheated status. Definition of dryness fraction of steam, degree of superheat of steam. H-s chart of steam (Mollier’s Chart).

1st Law of Thermodynamics: Definition of stored energy & internal energy, 1st Law of Thermodynamics of cyclic process, Non-Flow Energy Equation, Flow Energy & Definition of Enthalpy, Conditions for Steady State Steady Flow; Steady State Steady Flow Energy Equation.

2nd Law of Thermodynamics: Definition of Sink, Source Reservoir of Heat, Heat Engine, Heat Pump & Refrigerator; Thermal Efficiency of Heat Engines & co-efficient of performance of Refrigerators, Kelvin – Planck & Clausius Statements of 2nd Law of Thermodynamics, Absolute or Thermodynamic Scale of temperature, Clausius Integral, Entropy, Entropy change calculation of ideal gas processes. Carnot Cycle & Carnot Efficiency, PMM-2; definition & its impossibility.

Air standard Cycles for IC engines: Otto cycle; plot on P-V, T-S Planes; Thermal Efficiency, Diesel Cycle; Plot on P-V, T-S planes; Thermal efficiency. IC Engine Performance, IC Engine Combustion, IC Engine Cooling & Lubrication.

Rankine cycle of steam: Simple Rankine cycle plot on P-V, T-S, h-s planes, Rankine cycle efficiency with & without pump work.

Boilers; Classification; Specification; Fittings & Accessories: Fire Tube & Water Tube Boilers.

Air Compressors & their cycles: Refrigeration cycles; Principle of a Refrigeration Plant; Nozzles & Steam Turbines

Properties & Classification of Fluid: ideal & real fluids, Newton’s law of viscosity, Newtonian and Non-Newtonian fluids, compressible and incompressible fluids.

Fluid Statics: Pressure at a point.

Measurement of Fluid Pressure: Manometers, U-tube, Inclined tube.

Fluid Kinematics: Stream line, laminar & turbulent flow, external & internal flow, continuity equation.

Dynamics of ideal fluids: Bernoulli’s equation, Total head; Velocity head; Pressure head; Application of Bernoulli’s equitation.

Measurement of Flow rate Basic Principles: Venturi Meter, Pilot tube, Orifice meter. Hydraulic Turbines: Classifications, Principles.

Centrifugal Pumps: Classifications, Principles, Performance. Production Engineering

Classification of Steels: mild steel & alloy steel, Heat treatment of steel, Welding – Arc Welding, Gas Welding, Resistance Welding, Special Welding Techniques i.e. TIG, MIG, etc. (Brazing & Soldering), Welding Defects & Testing; NDT, Foundry & Casting – methods, defects, different casting processes, Forging, Extrusion, etc, Metal cutting principles, cutting tools, Basic Principles of machining with (i) Lathe (ii) Milling (iii) Drilling (iv) Shaping (v) Grinding, Machines, tools & manufacturing processes.