APPSC JE 2025-Syllabus & Exam Pattern (Complete Guide)

Recruiting Body

Arunachal Pradesh Public Service Commission (APPSC)

Post Name

Junior Engineer (JE)

Total Vacancies

413

Application Dates

September 18 to October 10, 2025

Exam Date (Tentative)

January 11, 2026

Selection Process

Written Examination, Viva Voce (Interview), and Document Verification

Paper-I

General Studies & Aptitude

150

150

Paper-II

Technical Paper (Branch-Specific)

300

300

Viva Voce

Interview

-

50

Total

450

500

General English

This section evaluates basic language skills. It includes grammar, vocabulary, reading comprehension, and sentence formation.

General Studies

This part assesses your awareness of the world, including current events, scientific and technological updates, and important national, international, and regional issues with a special focus on Arunachal Pradesh. Key topics include Indian History, Geography, Polity, and Economy.

Aptitude

This section includes questions on logical thinking, numerical ability, analytical skills, and problem-solving. It also covers topics in engineering mathematics and questions on ethics and values related to the engineering profession.

Measurements: Area and volume, force, energy, pressure, velocity, density, length, and metric measures of liquid, volume, and weight.

Water Supply Engineering: Quality and quantity of water, purification methods, and distribution systems.

Surveying: Chain, plane table, compass, leveling, contour, and theodolite surveys.

Drainage: Surface drainage, sewer design, domestic drains, and house drainage systems.

Strength of Materials: Stress, strains, elasticity, and bending moments.

Transportation Engineering: Classification of roads, geometric design, and types of pavements.

Soil Mechanics and Foundation: Engineering properties of soil, bearing capacity, and design of foundations.

Building Construction: Planning and design, building bylaws, and various materials.

General Masonry: Safe permissible loads, and design of retaining walls and abutments.

Irrigation Engineering: Hydrologic cycle, precipitation, and conservation measures.

R.C.C. Structure: Theory of reinforced concrete, properties of materials, and design principles.

Hydraulics: Properties of liquids, pressure, flow of liquids, and hydraulic machinery.

1. Thermodynamics

Introduction to engineering thermodynamics; Power generating equipment like boilers, turbines, and IC engines; Ideal gas compression and compressors; Fuel and combustion; IC engine cycles and efficiency calculations; Open and closed gas turbine cycles.

2. Heat Transfer

Introduction to heat and mass transfer; Steady-state conduction, convection, and radiation heat transfers.

3. Fluid Mechanics

Properties of liquid; Hydraulic pressure and its measurement; Flow of liquids, including steady, unsteady, laminar, and turbulent flows; Orifice, mouthpiece, and nozzles; Flow through pipes and the fundamentals of channel flow; Hydraulic machinery, including different types of pumps and turbines.

4. Machine Design & Manufacturing Processes

Machine Design: Drawing of gears, gear boxes, lathe and milling machine components; Drawing of miscellaneous machine parts of pumps, engines, and compressors. Manufacturing Processes: Study of hand tools for workshop practice; Practice on welding, automobile maintenance, and dismantling and assembling machine components; Fundamentals of metal cutting, calculations of cutting and tool life, and general-purpose machine tools; Newer and advanced machining processes like USM, LBM, EDM, ECM, and CNC machines.

1. Power Systems

Generation: Hydro Electric, Thermal, Nuclear, Solar, and Wind power generation systems; Basic understanding of electric generators, ratings of prime movers, and alternators. Transmission and Distribution: Short, medium, and long transmission lines; Voltage regulation, corona effect, Ferranti effect, and types of distribution feeders. Rural Electrification: LT transmission and distribution lines, rural electrification in India, and power tariffs.

2. Electrical Machines

DC Machines: Construction, working principles, and types of DC machines; EMF equations, armature reaction, torque equations, and speed control. Transformers: Construction, working principle, EMF equations, equivalent circuits, and efficiency; Autotransformers and three-phase transformers. Induction and Synchronous Machines: Working principles, rotating field, torque-speed characteristics of three-phase induction machines; Construction, working, and phasor diagrams of three-phase synchronous generators and motors.

3. Circuit Theory

Single-Phase A.C. Circuits: Phasor representation, and R-L, R-C, and R-L-C combinations; Impedance, power factor, and resonance. Three-Phase Circuits: Phasor representation, types of connections (star and delta), and power calculations. Network Theorems: Superposition theorem, Thevenin's theorem, Norton's theorem, and Maximum power transfer theorem.

4. Control Systems

Power System Protection: Switchgear and the protection of power systems.

1. Computer Networks

Computer Networking Concepts & Devices: Network topology, network types (LAN, MAN, WAN), and transmission media types. Connecting Devices: Hub, repeater, bridge, and switch. Internetworking Devices: Router, gateway, and firewall. Wireless Networks: Satellite systems, cellular systems (GSM, Wi-Fi, WiMAX), mobile ad hoc networks, Bluetooth, and wearable computers.

2. Microprocessors

Microcomputer: Organization and programming of 8-bit microprocessors. CPU: Memory and CPU support chips. Interfacing: Interfacing memory and I/O devices. Microprocessor Development Tools: Microprocessor-based and application development.

3. Communication Systems

Analog Signals: Types and representation of analog signals. Modulation: Amplitude, frequency, and phase modulation. Digital Communication: Typical digital communication system design, sampling theorem, and time multiplexing of signals. Errors: Error detection and correction for partial response coding. Digital Communication Techniques: Basic binary communication by on-off keying and frequency shift keying.

4. Other Topics

Electronics: Solid state devices, Boolean algebra, circuit minimization, and combinatorial and sequential circuits. Digital Electronics: Binary number codes, logic gates, and simplification of logic gates. Web Technology: HTML, HTML editors, web authoring tools, CSS, and JavaScript. Computer Programming: Programming in C syntax and semantics, variables, control flow, arithmetic and Boolean expressions, and object-oriented programming; Data structures and various types of representation of array elements. Peripherals & Fault Diagnosis: Input and output devices, troubleshooting processes, and maintenance checklists. Troubleshooting of Electronic Systems: Electronic components, systems symbols, identification of terminal, ratings, limitations, and types and causes of troubles; Measuring and test equipment like multimeters, ohm meters, and voltmeters.