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Dsssb Electrical Overseer / Sub Inspector 2026 Free Mock Test Practice
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DSSSB Electrical Overseer / Sub Inspector Syllabus 2026, Exam Pattern
DSSSB Electrical Overseer Syllabus 2026, Exam Pattern, Exam Date 2026
Detail Information about DSSSB (Delhi Subordinate Service Selection Board) has published notification 2026 for the recruitment of Electrical Overseer 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.
DSSSB Electrical Overseer Syllabus 2026 - Overview
| Recruitment Board | Delhi Subordinate Services Selection Board (DSSSB) |
| Advertisement No. | 45/26 |
| Department | Directorate of Education |
| Post Name | Electrical Overseer / Sub Inspector |
| Vacancies | 19 |
| Application Mode | Online |
| Job Location | Delhi |
| Category | Syllabus and Exam Pattern |
| Official Website | https://dsssb.delhi.gov.in |
DSSSB Electrical Overseer Syllabus 2026
General Awareness :
1. History
2. Politics
3. Constitution
4. Sports
5. Art and Culture
6. Geography
7. Economics
8. Everyday Science
9. Scientific Research
10. National and international news and updates
General Intelligence and Reasoning Ability :
1. Analogies
2. Similarities and Differences
3. Space Virtualization
4. Problem Analysis and Solving
5. Judgment and Decision Making
6. Visual Memory
7. Observation
8. Relationships and Concepts
9. Arithmetical Reasoning
10. Verbal and Figure Classification
11. Arithmetical Number Series
Arithmetical and Numerical Ability :
1. Simplification
2. Decimals and Fractions
3. HCF and LCM
4. Ratio and Proportions
5. Percentage
6. Average
7. Profit and loss
8. Discount, Simple and Compound Interest
9. Time, Work and Distance
10. Tables and Graphs
Hindi Language and Comprehension :
1. Hindi Vocabulary
2. Hindi Grammar and Sentence
3. Synonyms and Antonyms
English Language and Comprehension :
1. English Vocabulary
2. English Grammar and Sentence
3. Synonyms and Antonyms
4. Understanding passage
5. Conclusion Statements
Concerned Subject : (Expected)
Electrical Engineering :
1. Basic concepts: Concepts of resistance, inductance, capacitance, and various factors affecting them. Concepts of current, voltage, power, energy and their units.
2. Circuit law: Kirchhoff‘s law, Simple Circuit solution using network theorems.
3. Magnetic Circuit: Concepts of flux, mmf, reluctance, Different kinds of magnetic materials, Magnetic calculations for conductors of different configuration e.g. straight, circular, solenoidal, etc. Electromagnetic induction, self and mutual induction.
4. 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.
5. Measurement and measuring instruments: Measurement of power (1 phase and 3 phase, both active and reactive) 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), extension of range wattmeter, Multimeters, Megger, Energy meter AC Bridges. Use of CRO, Signal Generator, CT, PT and their uses. Earth Fault detection.
6. 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 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.
7. Synchronous Machines: Generation of 3-phase e.m.f. armature reaction, voltage regulation, parallel operation of two alternators, synchronizing, control of active and reactive power. Starting and applications of synchronous motors.
8. Generation, Transmission and Distribution: Different types of power stations, Load factor, diversity factor, demand factor, cost of generation, inter-connection of power stations. Power factor improvement, various types of tariffs, types of faults, short circuit current for symmetrical faults. Switchgears and Protection: Rating of circuit breakers, Principles of arc extinction by oil and air, H.R.C. Fuses, Protection against earth leakage / over current, etc. Buchholz 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.
9 Estimation and costing: Estimation of lighting scheme, electric installation of machines and relevant IE rules. Earthing practices and IE Rules.
10 Utilization of Electrical Energy: Illumination, Electric heating, Electric welding, Electroplating, Electric drives and motors.
11 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.
1. Basic concepts: Concepts of resistance, inductance, capacitance, and various factors affecting them. Concepts of current, voltage, power, energy and their units.
2. Circuit law: Kirchhoff‘s law, Simple Circuit solution using network theorems.
3. Magnetic Circuit: Concepts of flux, mmf, reluctance, Different kinds of magnetic materials, Magnetic calculations for conductors of different configuration e.g. straight, circular, solenoidal, etc. Electromagnetic induction, self and mutual induction.
4. 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.
5. Measurement and measuring instruments: Measurement of power (1 phase and 3 phase, both active and reactive) 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), extension of range wattmeter, Multimeters, Megger, Energy meter AC Bridges. Use of CRO, Signal Generator, CT, PT and their uses. Earth Fault detection.
6. 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 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.
7. Synchronous Machines: Generation of 3-phase e.m.f. armature reaction, voltage regulation, parallel operation of two alternators, synchronizing, control of active and reactive power. Starting and applications of synchronous motors.
8. Generation, Transmission and Distribution: Different types of power stations, Load factor, diversity factor, demand factor, cost of generation, inter-connection of power stations. Power factor improvement, various types of tariffs, types of faults, short circuit current for symmetrical faults. Switchgears and Protection: Rating of circuit breakers, Principles of arc extinction by oil and air, H.R.C. Fuses, Protection against earth leakage / over current, etc. Buchholz 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.
9 Estimation and costing: Estimation of lighting scheme, electric installation of machines and relevant IE rules. Earthing practices and IE Rules.
10 Utilization of Electrical Energy: Illumination, Electric heating, Electric welding, Electroplating, Electric drives and motors.
11 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.
DSSSB Electrical Overseer Exam Pattern 2026
Duration : 120 Minutes
Negative Marking : 0.25
| Section | Subject | No.of Question | Marks |
| Section A | General Awareness | 20 | 20 |
| General Intelligence & Reasoning Ability | 20 | 20 | |
| Arithmetical & Numerical Ability | 20 | 20 | |
| Test of Hindi Language & Comprehension | 20 | 20 | |
| Test of English Language & Comprehension | 20 | 20 | |
| Section B | Concerned Subject | 100 | 100 |
| Total | 200 | 200 |
Exam Date : Update Soon
Starting Date of Application Form : 16th June 2026
Last Date of Application Form : 15th July 2026
Total Post : 19
Total Post : 19
FAQs
Dsssb Electrical Overseer / Sub Inspector 2026 Exam Syllabus Frequently Asked Questions (FAQ's)
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