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DDA JE (Electrical/Mechanical) Syllabus 2026, Exam Pattern

Complete preparation hub for Dda Je (electrical/mechanical) 2026 recruitment examination

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📅 Updated On 5 Jan, 2026✨ Update By Sandeep Pandey🌐 Hindi & English

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DDA JE Stage- I (Electrical) Exam - Hindi150 questions
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DDA JE Stage- I (Electrical) Exam - Hindi150 questions
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DDA JE Stage- I (Mechanical) Exam - Hindi150 questions
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DDA JE (Electrical/Mechanical) Syllabus 2026, Exam Pattern

DDA JE (Electrical/Mechanical) Syllabus 2026, Exam Pattern, Exam Date 2026

Detail Information about DDA (Delhi Development Authority) has published notification 2026 for the recruitment of Junior Engineer (Electrical/Mechanical) vacancies. Those Candidates who are Interested to the following vacancy and completed all Eligibility Criteria can read the Notification & Apply Online. In this page we provide the Complete Syllabus of this Recruitment with Latest Update Exam Pattern and the Exam Date also.
 
DDA JE Syllabus 2026 - Overview
 
Organization Name Delhi Development Authority (DDA)
Post Name Groub B - Junior Engineer (Electrical/Mechanical)
Total Post Notified Soon
Exam Date 2026 Notified Soon
Job Location Delhi
Category Syllabus and Exam Pattern
Official Website
dda.org.in
 
DDA JE (Electrical/Mechanical) Syllabus 2026
 
General Awareness
 
1. India and its neighboring countries
2. History
3. Culture
4. Geography
5. Economic Scene
6. General Policy
7. Scientific Research
8. Current Affairs
 
Reasoning
 
1. Analogies
2. Similarities and differences
3. Space visualization
4. Spatial orientation
5. Problem-solving
6. Analysis
7. Judgment
8. Decision-making
9. Visual memory
10. Discrimination
11. Observation
12. Relationship concepts
13. Arithmetical reasoning and figural classification
14. Arithmetic number series
15. Non-verbal series
16. Coding and decoding
17. Statement conclusion
18. Syllogistic reasoning
19. Semantic Analogy
20. Symbolic/Number Analogy
21. Figural Analogy
22. Semantic Classification
23. Symbolic/Number Classification
24. Figural Classification
25. Semantic Series
26. Number Series, Figural Series
27. Problem Solving
28. Word Building
29. Numerical Operations
30. Symbolic Operations
31. Trends
32. Space Orientation
33. Space Visualization
34. Venn Diagrams
35. Drawing inferences
36. Punched hole/pattern–folding & unfolding
37. Figural Pattern– folding and completion
38. Indexing
39. Address matching, Date & city matching
40. Small & Capital letters/numbers coding, decoding
41. Classification
 
Quantitative Aptitude
 
1. Computation of whole numbers, decimals, fractions, and relationships between numbers
2. Percentages
3. Ratios & Proportions
4. Square roots
5. Averages
6. Interests
7. Profit and Loss
8. Discounts
9. Partnership Business
10. Mixture and Allegation
11. Time and distance
12. Time & Work
13. Basic algebraic identities of School Algebra
14. Triangle and its various kinds of centers
15. Congruence and similarity of triangles
16. Circle and its chords, tangentsangles subtended by chords of a circle, common tangents to two or more circles
17. Quadrilaterals
18. Regular Polygons
19. Sphere, Hemispheres
20. Rectangular Parallelepiped
21. Regular Right Pyramid with triangular or square base
22. Trigonometric ratio
23. Standard Identities
24. Complementary angles
25. Heights and Distances
26. Histogram
27. Frequency polygon
28. Bar diagram & Pie chart.
 
English Language
 
1. Spotting errors
2. Filling in the blanks
3. Synonyms
4. Antonyms
5. Spelling/detecting misspelled words
6. Idioms & phrases
7. One-word substitution
8. Improvement of sentences
9. Active/passive voice of verbs
10. Conversion into direct/indirect narration
11. Shuffling of sentence parts
12. Shuffling of sentences in a passage
13. Cloze passage & comprehension passage
Computer Knowledge :
 
1. Fundamentals of Computer System
2. Basics of Operating System
3. MS Office
4. Keyboard
5. Shortcuts and their uses
6. Important Computer Terms and Abbreviations
7. Computer Networks
8. Cyber Security, and Internet
 
Technical Subject : 
 
Part-I
 
Electrical Engineering:
 
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, RMS and average values of alternating waves, Representation of sinusoidal wave form, simple series and parallel AC Circuits consisting of RL and C, Resonance, Tank Circuit Poly Phase system – star and delta connection, 3 phase power, DC and sinusoidal response of R-Land R-Circuit
 
Measurement and measuring instruments: Measurement of power (1 phase and 3 phase, both active and re-active) and energy, 2 wattmeter methods of 3 phase power measurement, Measurement of frequency and phase angle Ammeter and voltmeter (both moving oil and moving iron type), 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) DC Machine – Construction, Basic Principles of DC motors and generators, their characteristics, speed control and starting of DC Motors Method of braking motor, Losses and efficiency of DC Machines (b) 1 phase and 3 phase transformers – Construction, Principles of operation, equivalent circuit, voltage regulation, OC and SC Tests, Losses and efficiency Effect of voltage, frequency and wave form on losses Parallel operation of 1 phase /3 phase transformers Auto transformers (c) 3 phase induction motors, rotating magnetic field, principle of operation, equivalent circuit, torque- speed characteristics, starting and speed control of 3 phase induction motors Methods of braking, 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 emf armature reaction, voltage regulation, parallel operation of two alternators, synchronizing, 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, interconnection of power stations Power factor improvement, various types of tariffs, types of faults, short circuit current for symmetrical faults Switchgears – rating of circuit breakers, Principles of arc extinction by oil and air, HRC 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 system, comparison of conductor materials, efficiency of different system Cable – Different type of cables, cable rating and derating factor
 
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
 
Mechanical Engineering:
 
Theory of Machines and Machine Design:
 
Concept of 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
 
Thermal Engineering:
 
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
 
Fluid Mechanics & Machinery:
 
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.
 
DDA JE (Electrical/Mechanical) Exam Pattern 2026
 
Stage - I :
Duration : 120 Minutes

 
Negative Marking : 0.33
 
S.No. Subject No.of Question Marks
Part 1 Respective Discipline 100 100
Part 2 Reasoning 10 10
  Quantitative Aptitude 10 10
  General Awareness 10 10
  English Language 10 10
  Computer Knowledge 10 10
  Total 150 150

Exam Date 2026 : Notified Soon
 
Starting Date of Application Form : Notified Soon
 
Last Date of Application Form : Notified Soon
FAQs

Dda Je (electrical/mechanical) 2026 Exam Syllabus Frequently Asked Questions (FAQ's)

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Being familiar with DDA JE Electrical and Mechanical Exam Pattern will help you understand the types of questions asked, difficulty level of the exam and important topics that require your keen attention. It will also acquaint you with the marking scheme and time allotted to each Topics.
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DDA JE Electrical and Mechanical exam is not tough but it depends on your preparation. The candidates find the Subject not challenging. The dedicated preparation in the right direction will undoubtedly take you towards the goal.
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Start by dividing the syllabus into sections and prioritizing high-weightage topics. Toppersexam provides a preparation strategy, along with topic-wise tips and sample questions to make syllabus analysis easier.
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