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TNPSC Technical Assistant (Electrical) Syllabus 2026, Exam Pattern
TNPSC Technical Assistant (Electrical) Syllabus 2026, Exam Pattern, Exam Date 2026
Detail Information about TNPSC has published notification 2026 for the recruitment of Technical Assistant (Electrical) 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.
TNPSC Technical Assistant (Electrical) Syllabus 2026 - Overview
| Recruitment Authority | Tamil Nadu Public Service Commission |
| Posts Name | Technical Assistant (Electrical) |
| Vacancies | Notified Soon |
| Apply Mode | Online |
| Category | Syllabus and Exam Pattern |
| Job Location | Tamil Nadu |
| Selection Process | Paper I & Paper II |
| Official Website | tnpsc.gov.in |
TNPSC Technical Assistant (Electrical) Syllabus 2026
Paper I :-
Part A: Tamil Eligibility Test :
Unit I Grammar (25 questions) :
Writing by separating letters, writing together, joining letters, joining lines - difference between kuril and nedil, difference between lakara, lakara, lakara, difference between nakara, nakara, difference between rakara, rakara, difference between rakara, different letters, recognizing cursive letters - recognizing singular and plural letters.
Word root recognition - Identifying the verb stem, adverb, adverb participle, noun, and noun types from the root word. Identifying Tamil words, antonyms, verb spelling errors, and spelling mistakes. Identifying the difference between two verbs.
Unit II: Vocabulary (15 questions) :
(i) Identifying antonyms, one word, one language, finding the correct meaning, multiple words giving the same meaning, finding the wrong word, arranging words in alphabetical order. Words that indicate one meaning, multilingual, two meanings, spoken language, written language. Knowing both the meaning and the synonym of a word.
(ii) Choosing the correct word to write in the space provided (e.g.) Going to school and getting education Speciality (studying, writing) If it appears in the sky, it will rain (mugil, star) Choosing the appropriate object (e.g.) Media Communication device (news and communication device). Society People's group [People's group meeting] Write the abbreviation of place names. (e.g.) Puducherry Puduwai, Mannargudi Mannai, Mylapore - Mayilai; Correct the error (e.g.) Combining pure Tamil words equivalent to one colloquial word (e.g.) Vethil Vetillai Nakkaali Chaiyar
(iii) Correction of errors in speech acts (e.g.) It rained yesterday. Forming new words by combining words and, or. By, then, until, this is not it. However, however, thus Inserting the word in brackets in the appropriate place (therefore because, therefore as, so, until, after) (e.g.) I went to the forest and therefore I saw the tiger I will play until the evening is over After completing the exam, we can go on a trip. A letter that gives meaning (e.g.) Aapasu Eekodu Thai month fire: Name a word that gives multiple meanings (e.g.) Kamala Ganjam Mulari Bangayam These words refer to lotus
Unit III: Writing Skills (15 questions) :
(i) Arranging words to form sentences - Types of sentences - Verb, Infinitive, Infinitive, Singular, Plural, Correct and Correct Sentences.
(ii) Traditional Tamil: Thinai Traditional High Thinai: Mother came. Mother came, the cows got wet. The cows got wet; Male: Masculine; He came. He came; Feminine She came She came: Many Male: They came They came. One's male: It came. It came Many's male: Birds flew - Birds flew; Time: It rained yesterday It rained yesterday I will come yesterday. I will come yesterday; Young name: Cow calf Goat cub: The dog screamed. The dog barked. Verbal: Basket full of rice. Amount: Crowd of people Crowd of sheep Herd Punctuation marks: Quarter point, semicolon, three-quarter point, full stop Exclamation mark Question mark places.
Unit IV: Art Terms (10 Questions) :
You should know the Tamil words that are directly related to the technical terms of various fields, such as science, medicine, management, law, geography. Technology, media, information technology, etc. (For example, search engine Migration. - Allergy, gug-Gene, and modo. Nautical Mile)
Unit V: Reading Comprehension (15 questions) :
Reading newspaper editorials, front pages, government news, articles, etc. Reading comprehension skills Understanding the meaning of a series of parables Understanding the meaning of a series of proverbs Understanding the meaning of proverbs Understanding the content of documents.
Unit VI: Simple Translation (5 questions) :
Must know Tamil equivalents of English and foreign words Must be able to translate English words in use (Reference: pendrive, printer computer, keyboard). Understand the translation of documents, header files, letters, petitions.
Unit VII: Literature, Tamil Scholars and Tamil Language (15 Questions) :
News related to Thirukkural (twenty chapters only) Morality, patience, encouragement, hospitality, emphasis on virtue. Eigai, Periyarai Subjunctive Verb, Non-attendance, Perspective. Love, education, neutrality, morality, nobility, character, friendliness, non-judgment, grace. Quotes - News related to religious books (Naladiyar. Naanmanikkadigai, Proverb Nanuroo Mudhumozhikanchi. Trikadugam, Innanalpadu. Sirupanchamoolam, Elathi, Avvaiyar songs) - News related to ancient Tamil languages, special Dravidian languages, Uve. Saminatha Iyer, The. Bomeenatchi Sundaram C. Ilakuvanar, News related to Tamil work, Devanya Pavanar, Agaramathali Pavalareru Perunchithranar, Jiu Pope. Veeramamunivar, News related to Tamil Thondu, News related to Tamil scholars, Pavendar. D.K. Chidambaranathar, Thavathiru Kunrakudi Adikalar Kannadasan, Kayide Millath Tara Bharathi. Velunachiyar Pattukkottai Kalyanasundaram Mudiyarasan Tamil Oli Ruthrangankannar K.V.A. Jaganthathar, Namakkal poet.
PART B: General Studies (Degree Standard) :
UNIT I: General Science (5 Questions) :
Scientific knowledge and scientific temper - Power of reasoning - Rote learning vs conceptual learning - Science as a tool to understand the past, present, and future; Nature of universe - General scientific laws– Mechanics - Properties of matter, force, motion, and energy - Everyday application of the basic principles of mechanics, electricity and magnetism, light, sound, heat, nuclear physics, laser, electronics, and communications; Elements and compounds, acids, bases, salts, petroleum products, fertilizers, pesticides; Main concepts of life science, classification of living organisms, evolution, genetics, physiology, nutrition, health and hygiene, human diseases; Environment and ecology; Latest inventions in science and technology; Current affairs.
UNIT II: Geography of India (5 Questions) :
Location - Physical features - Monsoon, rainfall, weather and climate - Water resources - Rivers in India - Soil, Minerals and Natural Resources - Forest and Wildlife - Agricultural pattern; Transport –Communication; Social Geography – Population density and distribution - Racial, linguistic groups and major tribes; Natural calamity - Disaster management; Environmental pollution - Reasons and preventivemeasures - Climate change - Green energy; Geographical landmarks; Current affairs.
UNIT III: History, Culture of India, and Indian National Movement (10 Questions) :
Indus Valley Civilization - Guptas, Delhi Sultans, Mughals, and Marathas - Age of Vijayanagaram and Bahmani Kingdoms - South Indian History; National Renaissance - Early uprising against British rule - Indian National Congress - Emergence of leaders – B.R.Ambedkar, Bhagat Singh, Bharathiar, V.O.Chidambaranar, Jawaharlal Nehru, Kamarajar, Mahatma Gandhi, Maulana Abul Kalam Azad, Thanthai Periyar, Rajaji, Subash Chandra Bose, Rabindranath Tagore, and others; Different modes of agitation: Growth of Satyagraha and Militant Movements; Communalism and Partition; Change and continuity in the socio-cultural history of India; Characteristics of Indian Culture, Unity in Diversity – Race, Language, Custom; India as a secular state, Social harmony; Prominent personalities in various spheres– Arts, Science, Literature and Philosophy
UNIT IV: Indian Polity (15 Questions) :
Constitution of India - Preamble to the Constitution - Salient features of the Constitution - Union, State and Union Territory - Citizenship, Fundamental Rights, Fundamental Duties, Directive Principles of State Policy - Union Executive, Union Legislature - State Executive, State Legislature - Local Governments, Panchayat Raj - Spirit of federalism: Centre - State relationships - Election - Judiciary in India – Rule of Law - Corruption in public life – Anti-corruption measures - Lokpal and Lok Ayukta - Right to Information - Empowerment of Women - Consumer Protection Forums, Human Rights Charter; Political parties and political system in India; Current affairs.
UNIT V: Indian Economy and Development Administration in Tamil Nadu (20 Questions) :
Nature of Indian Economy – Five-year plan models - an assessment - Planning Commission and Niti Aayog; Sources of revenue - Reserve Bank of India - Fiscal Policy and Monetary Policy - Finance Commission - Resource sharing between Union and State Governments - Goods and Services Tax; Structure of Indian Economy and Employment Generation, Land Reforms and Agriculture - Application of Science and Technology in Agriculture - Industrial growth - Rural welfare oriented programmes - Social problems - Population, Education, Health, Employment, Poverty; Human Development Indicators in Tamil Nadu and a comparative assessment across the Country – Impact of social reform movements in the socio-economic development of Tamil Nadu - Political parties, and welfare schemes for various sections of people - Rationale behind the reservation policy, and access to the social resources - Economic trends in Tamil Nadu - Role and impact of social welfare schemes in the socio-economic development of Tamil Nadu - Social Justice and social harmony as the cornerstones of socio-economic development; Education and health systems in Tamil Nadu; Geography of Tamil Nadu and its impact on economic growth; Achievements of Tamil Nadu in various fields; e-Governance in Tamil Nadu; Public awareness and General administration - Welfare oriented Government schemes and their utility, Problems in public delivery systems; Current socio-economic issues; Current affairs.
UNIT VI: History, Culture, Heritage, and Socio-Political Movements in Tamil Nadu (20 Questions) :
History of Tamil Society, related archaeological discoveries, Tamil literature from Sangam age till contemporary times - Thirukkural - Significance as a secular literature - Relevance to everyday life, Impact of Thirukkural on humanity, Thirukkural and universal values - Relevance to Socio-politicoeconomic affairs, Philosophical content in Thirukkural; Role of Tamil Nadu in freedom struggle - Early agitations against British Rule - Role of women in freedom struggle; Evolution of 19th and 20th century socio-political movements in Tamil Nadu - Justice Party, Growth of Rationalism - Self Respect Movement, Dravidian Movement, and principles underlying both these movements; Contributions of Thanthai Periyar and Perarignar Anna.
PART C: Aptitude and Mental Ability :-
UNIT I: Aptitude (15 Questions) :
Simplification - Percentage - Highest Common Factor (HCF) - Lowest Common Multiple (LCM) - Ratio and Proportion - Simple interest - Compound interest - Area - Volume - Time and Work.
UNIT II: Reasoning (10 Questions) :
Logical reasoning - Puzzles - Dice - Visual reasoning - Alpha numeric reasoning - Number series.
Paper II: Electrical Engineering (Degree Standard) :
Unit I: Circuit Theory and DC Machines (25 Questions) :
Electrostatics - Basic Concepts of Electricity - Ohm’s Law, Kirchhoff’s Laws, Series, Parallel and SeriesParallel Circuits - Network Theorems (Mesh Analysis, Nodal Analysis, Superposition, Thevenin’s, Norton’s and Maximum Power Transfer Theorems) - Star–Delta transformation - Source Transformation (Simple problems in DC only) - Single Phase AC and 3 Phase AC Circuits - Resonant Circuits - Electromagnetism- DC Generator - Types - Construction - Working - EMF Equation - Characteristic Curves - Armature reaction - Applications - DC Motor - Types - construction - Working - Characteristics - Commutation - Applications - Speed Control - D.C Starters - Losses in DC Machines - Testing of DC Machines -Maintenance of DC Machines - Storage Batteries - Special DC Machines - PMDC - DC Servor Motor -Stepper Motor - Variable Reluctance Stepper Motor - Permanent Magnet Stepper Motor.
Unit II: AC Machines (25 Questions) :
Single Phase Transformer - Construction - Principle of Operation - EMF Equation - Vector Diagram - Regulation, Losses and Efficiency - OC & SC Test - Parallel Operation - Auto Transformer - All day Efficiency - Three Phase Transformer - Construction - Testing - Parallel operation - Grouping of Transformer - Maintenance - Alternator - Construction - EMF Equation - Parallel operation - Testing - Determination of voltage regulation - Synchronous Motor - Construction - Starting Methods -Characteristics - Applications - 3 Phase induction motor - Types - Construction and Working Principle -Characteristics - Phasor Diagram - Starters - Speed Control - Maintenance - Single Phase Induction Motors- Working Principle - Types - Applications - Special AC Machines - Permanent Magnet Synchronous Motor, SRM, AC Servor Motor - Linear Induction Motor.
Unit III: Measurements and Instruments (25 Questions) :
Classification and characteristics of instruments - Operating forces - Construction and Working of MI, MC and Dynamometer type instruments - Extension of Instrument Range - Instrument transformers - Direct measurement of current, Voltage and Resistance - Measurement of Power - Measurement of Energy - Single Phase and 3 Phase Energy meters - Measurement of power factor - Maximum demand indicator - Synchroscope - Measurement of frequency - AC Bridges - Anderson bridge - Schering bridge - Cathode ray Oscilloscope - Sensing elements – Transducers - Passive, active transducers.
Unit IV: Electronic Devices and Circuits (15 Questions) :
Semi conductor Diodes - Rectifiers - Half wave, full wave and Bridge rectifier - 3 Phase rectifiers - Filter - Types - Capacitor filter - Inductor filter - L Section filter - ∏ Section filter - RC Filter - Bipolar Junction Transistors (BJT) - Biasing - configuration - Field effect Transistors (JFET & MOSFET) and Unit junction Transistor (UJT) - Transistor Oscillators - Special semiconductor devices - Gunn diode, varactor diode, Zener diode, Tunnel diode - Silicon controlled Rectifier - DIAC - TRIAC –IGBT - Optoelectronic devices - LDR, LED, LCD, Opto coupler, IR transmitter and receiver,Laser diode , Solar cell, Photo diode, Photo transistor - Diode clipper - Diode clamper - Voltage Multiplier - Multi vibrators - Astable, Monostable, Bistable - Schmitt trigger - Seven Segment LED - Amplifier - RC Coupled amplifier - Emitter follower -Oscillator - Hartley Oscillator, Colpitts Oscillator - RC Phase Shift Oscillator.
Unit V: Analog and Digital Electronics (15 Questions) :
Operational amplifiers Specifications - characteristics - Applications - Number system - Boolean algebra - De-Morgan’s theorems - Logic gates - Digital logic families - Combinational Logic Circuits - Sequential Logic Circuits - Flip-flops, Counters, shift registers - Memory devices - D/A and A/D converters - Special
function ICs - IC555 timer - IC565 - IC566 - IC Voltage regulators - Karnagh map (Upto 4 Variables) - Half adder - Full adder - Half Subtractor - Full Subtractor - Parity Generator and Checker - Decimal to BCD Encoder - 3 to 8 Decoder - 4 to 1 Multiplexer - 1 to 4 Demultiplexer - Flipflops - JK - RS - Edge triggered FF - D-FF - T-FF - Counters - Up counter - Down counter - Decade counter - Mod N counter - Shift register- Memories - ROM - RAM.
Unit VI: Generation, Transmission and Switch Gear: (25 Questions) :
Generation of Electrical Energy - Conventional Methods, Co-generation Methods - Inter Connected System- Load Curve - Load duration curves - Demand factor - Capacity Factor - Load factor - Diversity factor -Base Load and Peak load plants - Renewable Energy Sources - Solar power generation on grid and off
grid solar power - Different types of PV Panels - Wind - Tidal - Bio - Geo - Hybrid - AC Transmission - HV Transmission - Voltage Regulation - Transmission efficiency - Over Head lines - Constants of TL -Transposition of TL - Skin, Ferranti effect - Corona - HVDC Transmission - Facts Controllers (Statcom, UPFC) - Line Insulators - String Efficiency - Underground Cables - Types of Cables - Laying of Cables -Switch gear - Circuit Breaker [ELCB,SF6, Vacuum CB, Oil CB] - Fuses [HRC, HV, Cartridge, Liquid Type and Metal clad] - Over Voltage Protection - Lightning Arresters - Protective relays - Grounding - Renewable Energy.
Unit VII: Distribution and Utilisation (25 Questions) :
AC and DC Distribution - Substations - Indoor SS - Outdoor SS - Feeder - Distributors - Fault Analysis - Protection System - Busbar system - Industrial Drives - Types of electric drives and choice of electric motor - Electric Traction - System of track electrification - Traction mechanics - Traction motors and control - Magnetic levitation - Illumination - Laws of illumination - Lighting systems - Construction and Characteristics of Arc, Incandescent, Sodium vapour - CFL and LED lamps - Electric heating - Electric furnaces - Electric welding - Electric welding equipments.
Unit VIII: Micro Controller and its Application (10 Questions) :
8051 micro controller - Architecture - Instruction set - Assembler directives - Addressing modes - Programs - I/O programming - Timer/Counter programming - Serial communication - Interrupts - IC 8255 - Interfacing techniques with 8051 - Applications - PIC Micro Controller - Arduino - Raspberry Pi - Introduction to IOT - Architecture of IOT Systems.
Unit IX: A. Power Electronics and Drives (20 Questions) :
Thyristor family - SCR Triggering Circuits [R, RC, UJT, Pulse Transformer triggeing circuits - IC based Triggering Circuits] - Driver and Buffer Circuits - Commutation Circuits - Phase Controlled Rectifier -Thyristor Protection - Choppers - SMPS - Inverters - UPS - Control of DC Drives – Rectifier Based Control, Chopper Based Control - Closed Loop Control - Control of AC Drives [Stator Voltage Control, Variable Frequency Control, v/f Control Rotor resistance control] - Closed Loop Control - Micro Processor based PWM Control - Static Var Compensation - Cyclo Converters.
B. Electrical Estimation & Energy Auditing :
Indian Electricity Rules - 1956-Standard symbols for various wiring items, accessories - Types of Internal Wiring - Service Connection (Over Head and Under Ground) - Quantity of Material Required in Electrical Installation - Wire Size - Selection of fuses - Earthing - Testing of installations - Domestic, commercial and industrial installation estimate - Energy auditing - Need of Energy audit and management - Types of Energy audit - Audit Process - Electrical Measurement - Load and Power factor measuring equipment - Energy conservation - Selection of cable - Lighting systems - Pumping systems.
Unit X: Control of Electrical Machines: (15 Questions) :
Control Circuit Components [Switches, Relays, Timers, Contactors] - Simple Motor Control Circuits - DC Motor Control Circuits - Starters, Jogging, Dynamic braking, Plugging, Reversing Control - AC Motor Control Circuits -Starters - 2 Speed Motor Control - Reversing the Rotation of IM - Dynamic braking - Plugging - Industrial Control Circuits [Planner Machine - Skip Hoist - Water pump - Electric Oven - Air Compressor - Over Head Crane - Battery Operated Truck - Conveyor System - Elevator] - PLC -Components of PLC - Operation of PLC - Scan - PLC Memory - i/p and o/p Module - Programming, Programming Devices - Ladder Diagram (Relay, Timer, Counter) - DOL, λ/Δ Starter - EB to Gen - SCADA- DCS..
Part A: Tamil Eligibility Test :
Unit I Grammar (25 questions) :
Writing by separating letters, writing together, joining letters, joining lines - difference between kuril and nedil, difference between lakara, lakara, lakara, difference between nakara, nakara, difference between rakara, rakara, difference between rakara, different letters, recognizing cursive letters - recognizing singular and plural letters.
Word root recognition - Identifying the verb stem, adverb, adverb participle, noun, and noun types from the root word. Identifying Tamil words, antonyms, verb spelling errors, and spelling mistakes. Identifying the difference between two verbs.
Unit II: Vocabulary (15 questions) :
(i) Identifying antonyms, one word, one language, finding the correct meaning, multiple words giving the same meaning, finding the wrong word, arranging words in alphabetical order. Words that indicate one meaning, multilingual, two meanings, spoken language, written language. Knowing both the meaning and the synonym of a word.
(ii) Choosing the correct word to write in the space provided (e.g.) Going to school and getting education Speciality (studying, writing) If it appears in the sky, it will rain (mugil, star) Choosing the appropriate object (e.g.) Media Communication device (news and communication device). Society People's group [People's group meeting] Write the abbreviation of place names. (e.g.) Puducherry Puduwai, Mannargudi Mannai, Mylapore - Mayilai; Correct the error (e.g.) Combining pure Tamil words equivalent to one colloquial word (e.g.) Vethil Vetillai Nakkaali Chaiyar
(iii) Correction of errors in speech acts (e.g.) It rained yesterday. Forming new words by combining words and, or. By, then, until, this is not it. However, however, thus Inserting the word in brackets in the appropriate place (therefore because, therefore as, so, until, after) (e.g.) I went to the forest and therefore I saw the tiger I will play until the evening is over After completing the exam, we can go on a trip. A letter that gives meaning (e.g.) Aapasu Eekodu Thai month fire: Name a word that gives multiple meanings (e.g.) Kamala Ganjam Mulari Bangayam These words refer to lotus
Unit III: Writing Skills (15 questions) :
(i) Arranging words to form sentences - Types of sentences - Verb, Infinitive, Infinitive, Singular, Plural, Correct and Correct Sentences.
(ii) Traditional Tamil: Thinai Traditional High Thinai: Mother came. Mother came, the cows got wet. The cows got wet; Male: Masculine; He came. He came; Feminine She came She came: Many Male: They came They came. One's male: It came. It came Many's male: Birds flew - Birds flew; Time: It rained yesterday It rained yesterday I will come yesterday. I will come yesterday; Young name: Cow calf Goat cub: The dog screamed. The dog barked. Verbal: Basket full of rice. Amount: Crowd of people Crowd of sheep Herd Punctuation marks: Quarter point, semicolon, three-quarter point, full stop Exclamation mark Question mark places.
Unit IV: Art Terms (10 Questions) :
You should know the Tamil words that are directly related to the technical terms of various fields, such as science, medicine, management, law, geography. Technology, media, information technology, etc. (For example, search engine Migration. - Allergy, gug-Gene, and modo. Nautical Mile)
Unit V: Reading Comprehension (15 questions) :
Reading newspaper editorials, front pages, government news, articles, etc. Reading comprehension skills Understanding the meaning of a series of parables Understanding the meaning of a series of proverbs Understanding the meaning of proverbs Understanding the content of documents.
Unit VI: Simple Translation (5 questions) :
Must know Tamil equivalents of English and foreign words Must be able to translate English words in use (Reference: pendrive, printer computer, keyboard). Understand the translation of documents, header files, letters, petitions.
Unit VII: Literature, Tamil Scholars and Tamil Language (15 Questions) :
News related to Thirukkural (twenty chapters only) Morality, patience, encouragement, hospitality, emphasis on virtue. Eigai, Periyarai Subjunctive Verb, Non-attendance, Perspective. Love, education, neutrality, morality, nobility, character, friendliness, non-judgment, grace. Quotes - News related to religious books (Naladiyar. Naanmanikkadigai, Proverb Nanuroo Mudhumozhikanchi. Trikadugam, Innanalpadu. Sirupanchamoolam, Elathi, Avvaiyar songs) - News related to ancient Tamil languages, special Dravidian languages, Uve. Saminatha Iyer, The. Bomeenatchi Sundaram C. Ilakuvanar, News related to Tamil work, Devanya Pavanar, Agaramathali Pavalareru Perunchithranar, Jiu Pope. Veeramamunivar, News related to Tamil Thondu, News related to Tamil scholars, Pavendar. D.K. Chidambaranathar, Thavathiru Kunrakudi Adikalar Kannadasan, Kayide Millath Tara Bharathi. Velunachiyar Pattukkottai Kalyanasundaram Mudiyarasan Tamil Oli Ruthrangankannar K.V.A. Jaganthathar, Namakkal poet.
PART B: General Studies (Degree Standard) :
UNIT I: General Science (5 Questions) :
Scientific knowledge and scientific temper - Power of reasoning - Rote learning vs conceptual learning - Science as a tool to understand the past, present, and future; Nature of universe - General scientific laws– Mechanics - Properties of matter, force, motion, and energy - Everyday application of the basic principles of mechanics, electricity and magnetism, light, sound, heat, nuclear physics, laser, electronics, and communications; Elements and compounds, acids, bases, salts, petroleum products, fertilizers, pesticides; Main concepts of life science, classification of living organisms, evolution, genetics, physiology, nutrition, health and hygiene, human diseases; Environment and ecology; Latest inventions in science and technology; Current affairs.
UNIT II: Geography of India (5 Questions) :
Location - Physical features - Monsoon, rainfall, weather and climate - Water resources - Rivers in India - Soil, Minerals and Natural Resources - Forest and Wildlife - Agricultural pattern; Transport –Communication; Social Geography – Population density and distribution - Racial, linguistic groups and major tribes; Natural calamity - Disaster management; Environmental pollution - Reasons and preventivemeasures - Climate change - Green energy; Geographical landmarks; Current affairs.
UNIT III: History, Culture of India, and Indian National Movement (10 Questions) :
Indus Valley Civilization - Guptas, Delhi Sultans, Mughals, and Marathas - Age of Vijayanagaram and Bahmani Kingdoms - South Indian History; National Renaissance - Early uprising against British rule - Indian National Congress - Emergence of leaders – B.R.Ambedkar, Bhagat Singh, Bharathiar, V.O.Chidambaranar, Jawaharlal Nehru, Kamarajar, Mahatma Gandhi, Maulana Abul Kalam Azad, Thanthai Periyar, Rajaji, Subash Chandra Bose, Rabindranath Tagore, and others; Different modes of agitation: Growth of Satyagraha and Militant Movements; Communalism and Partition; Change and continuity in the socio-cultural history of India; Characteristics of Indian Culture, Unity in Diversity – Race, Language, Custom; India as a secular state, Social harmony; Prominent personalities in various spheres– Arts, Science, Literature and Philosophy
UNIT IV: Indian Polity (15 Questions) :
Constitution of India - Preamble to the Constitution - Salient features of the Constitution - Union, State and Union Territory - Citizenship, Fundamental Rights, Fundamental Duties, Directive Principles of State Policy - Union Executive, Union Legislature - State Executive, State Legislature - Local Governments, Panchayat Raj - Spirit of federalism: Centre - State relationships - Election - Judiciary in India – Rule of Law - Corruption in public life – Anti-corruption measures - Lokpal and Lok Ayukta - Right to Information - Empowerment of Women - Consumer Protection Forums, Human Rights Charter; Political parties and political system in India; Current affairs.
UNIT V: Indian Economy and Development Administration in Tamil Nadu (20 Questions) :
Nature of Indian Economy – Five-year plan models - an assessment - Planning Commission and Niti Aayog; Sources of revenue - Reserve Bank of India - Fiscal Policy and Monetary Policy - Finance Commission - Resource sharing between Union and State Governments - Goods and Services Tax; Structure of Indian Economy and Employment Generation, Land Reforms and Agriculture - Application of Science and Technology in Agriculture - Industrial growth - Rural welfare oriented programmes - Social problems - Population, Education, Health, Employment, Poverty; Human Development Indicators in Tamil Nadu and a comparative assessment across the Country – Impact of social reform movements in the socio-economic development of Tamil Nadu - Political parties, and welfare schemes for various sections of people - Rationale behind the reservation policy, and access to the social resources - Economic trends in Tamil Nadu - Role and impact of social welfare schemes in the socio-economic development of Tamil Nadu - Social Justice and social harmony as the cornerstones of socio-economic development; Education and health systems in Tamil Nadu; Geography of Tamil Nadu and its impact on economic growth; Achievements of Tamil Nadu in various fields; e-Governance in Tamil Nadu; Public awareness and General administration - Welfare oriented Government schemes and their utility, Problems in public delivery systems; Current socio-economic issues; Current affairs.
UNIT VI: History, Culture, Heritage, and Socio-Political Movements in Tamil Nadu (20 Questions) :
History of Tamil Society, related archaeological discoveries, Tamil literature from Sangam age till contemporary times - Thirukkural - Significance as a secular literature - Relevance to everyday life, Impact of Thirukkural on humanity, Thirukkural and universal values - Relevance to Socio-politicoeconomic affairs, Philosophical content in Thirukkural; Role of Tamil Nadu in freedom struggle - Early agitations against British Rule - Role of women in freedom struggle; Evolution of 19th and 20th century socio-political movements in Tamil Nadu - Justice Party, Growth of Rationalism - Self Respect Movement, Dravidian Movement, and principles underlying both these movements; Contributions of Thanthai Periyar and Perarignar Anna.
PART C: Aptitude and Mental Ability :-
UNIT I: Aptitude (15 Questions) :
Simplification - Percentage - Highest Common Factor (HCF) - Lowest Common Multiple (LCM) - Ratio and Proportion - Simple interest - Compound interest - Area - Volume - Time and Work.
UNIT II: Reasoning (10 Questions) :
Logical reasoning - Puzzles - Dice - Visual reasoning - Alpha numeric reasoning - Number series.
Paper II: Electrical Engineering (Degree Standard) :
Unit I: Circuit Theory and DC Machines (25 Questions) :
Electrostatics - Basic Concepts of Electricity - Ohm’s Law, Kirchhoff’s Laws, Series, Parallel and SeriesParallel Circuits - Network Theorems (Mesh Analysis, Nodal Analysis, Superposition, Thevenin’s, Norton’s and Maximum Power Transfer Theorems) - Star–Delta transformation - Source Transformation (Simple problems in DC only) - Single Phase AC and 3 Phase AC Circuits - Resonant Circuits - Electromagnetism- DC Generator - Types - Construction - Working - EMF Equation - Characteristic Curves - Armature reaction - Applications - DC Motor - Types - construction - Working - Characteristics - Commutation - Applications - Speed Control - D.C Starters - Losses in DC Machines - Testing of DC Machines -Maintenance of DC Machines - Storage Batteries - Special DC Machines - PMDC - DC Servor Motor -Stepper Motor - Variable Reluctance Stepper Motor - Permanent Magnet Stepper Motor.
Unit II: AC Machines (25 Questions) :
Single Phase Transformer - Construction - Principle of Operation - EMF Equation - Vector Diagram - Regulation, Losses and Efficiency - OC & SC Test - Parallel Operation - Auto Transformer - All day Efficiency - Three Phase Transformer - Construction - Testing - Parallel operation - Grouping of Transformer - Maintenance - Alternator - Construction - EMF Equation - Parallel operation - Testing - Determination of voltage regulation - Synchronous Motor - Construction - Starting Methods -Characteristics - Applications - 3 Phase induction motor - Types - Construction and Working Principle -Characteristics - Phasor Diagram - Starters - Speed Control - Maintenance - Single Phase Induction Motors- Working Principle - Types - Applications - Special AC Machines - Permanent Magnet Synchronous Motor, SRM, AC Servor Motor - Linear Induction Motor.
Unit III: Measurements and Instruments (25 Questions) :
Classification and characteristics of instruments - Operating forces - Construction and Working of MI, MC and Dynamometer type instruments - Extension of Instrument Range - Instrument transformers - Direct measurement of current, Voltage and Resistance - Measurement of Power - Measurement of Energy - Single Phase and 3 Phase Energy meters - Measurement of power factor - Maximum demand indicator - Synchroscope - Measurement of frequency - AC Bridges - Anderson bridge - Schering bridge - Cathode ray Oscilloscope - Sensing elements – Transducers - Passive, active transducers.
Unit IV: Electronic Devices and Circuits (15 Questions) :
Semi conductor Diodes - Rectifiers - Half wave, full wave and Bridge rectifier - 3 Phase rectifiers - Filter - Types - Capacitor filter - Inductor filter - L Section filter - ∏ Section filter - RC Filter - Bipolar Junction Transistors (BJT) - Biasing - configuration - Field effect Transistors (JFET & MOSFET) and Unit junction Transistor (UJT) - Transistor Oscillators - Special semiconductor devices - Gunn diode, varactor diode, Zener diode, Tunnel diode - Silicon controlled Rectifier - DIAC - TRIAC –IGBT - Optoelectronic devices - LDR, LED, LCD, Opto coupler, IR transmitter and receiver,Laser diode , Solar cell, Photo diode, Photo transistor - Diode clipper - Diode clamper - Voltage Multiplier - Multi vibrators - Astable, Monostable, Bistable - Schmitt trigger - Seven Segment LED - Amplifier - RC Coupled amplifier - Emitter follower -Oscillator - Hartley Oscillator, Colpitts Oscillator - RC Phase Shift Oscillator.
Unit V: Analog and Digital Electronics (15 Questions) :
Operational amplifiers Specifications - characteristics - Applications - Number system - Boolean algebra - De-Morgan’s theorems - Logic gates - Digital logic families - Combinational Logic Circuits - Sequential Logic Circuits - Flip-flops, Counters, shift registers - Memory devices - D/A and A/D converters - Special
function ICs - IC555 timer - IC565 - IC566 - IC Voltage regulators - Karnagh map (Upto 4 Variables) - Half adder - Full adder - Half Subtractor - Full Subtractor - Parity Generator and Checker - Decimal to BCD Encoder - 3 to 8 Decoder - 4 to 1 Multiplexer - 1 to 4 Demultiplexer - Flipflops - JK - RS - Edge triggered FF - D-FF - T-FF - Counters - Up counter - Down counter - Decade counter - Mod N counter - Shift register- Memories - ROM - RAM.
Unit VI: Generation, Transmission and Switch Gear: (25 Questions) :
Generation of Electrical Energy - Conventional Methods, Co-generation Methods - Inter Connected System- Load Curve - Load duration curves - Demand factor - Capacity Factor - Load factor - Diversity factor -Base Load and Peak load plants - Renewable Energy Sources - Solar power generation on grid and off
grid solar power - Different types of PV Panels - Wind - Tidal - Bio - Geo - Hybrid - AC Transmission - HV Transmission - Voltage Regulation - Transmission efficiency - Over Head lines - Constants of TL -Transposition of TL - Skin, Ferranti effect - Corona - HVDC Transmission - Facts Controllers (Statcom, UPFC) - Line Insulators - String Efficiency - Underground Cables - Types of Cables - Laying of Cables -Switch gear - Circuit Breaker [ELCB,SF6, Vacuum CB, Oil CB] - Fuses [HRC, HV, Cartridge, Liquid Type and Metal clad] - Over Voltage Protection - Lightning Arresters - Protective relays - Grounding - Renewable Energy.
Unit VII: Distribution and Utilisation (25 Questions) :
AC and DC Distribution - Substations - Indoor SS - Outdoor SS - Feeder - Distributors - Fault Analysis - Protection System - Busbar system - Industrial Drives - Types of electric drives and choice of electric motor - Electric Traction - System of track electrification - Traction mechanics - Traction motors and control - Magnetic levitation - Illumination - Laws of illumination - Lighting systems - Construction and Characteristics of Arc, Incandescent, Sodium vapour - CFL and LED lamps - Electric heating - Electric furnaces - Electric welding - Electric welding equipments.
Unit VIII: Micro Controller and its Application (10 Questions) :
8051 micro controller - Architecture - Instruction set - Assembler directives - Addressing modes - Programs - I/O programming - Timer/Counter programming - Serial communication - Interrupts - IC 8255 - Interfacing techniques with 8051 - Applications - PIC Micro Controller - Arduino - Raspberry Pi - Introduction to IOT - Architecture of IOT Systems.
Unit IX: A. Power Electronics and Drives (20 Questions) :
Thyristor family - SCR Triggering Circuits [R, RC, UJT, Pulse Transformer triggeing circuits - IC based Triggering Circuits] - Driver and Buffer Circuits - Commutation Circuits - Phase Controlled Rectifier -Thyristor Protection - Choppers - SMPS - Inverters - UPS - Control of DC Drives – Rectifier Based Control, Chopper Based Control - Closed Loop Control - Control of AC Drives [Stator Voltage Control, Variable Frequency Control, v/f Control Rotor resistance control] - Closed Loop Control - Micro Processor based PWM Control - Static Var Compensation - Cyclo Converters.
B. Electrical Estimation & Energy Auditing :
Indian Electricity Rules - 1956-Standard symbols for various wiring items, accessories - Types of Internal Wiring - Service Connection (Over Head and Under Ground) - Quantity of Material Required in Electrical Installation - Wire Size - Selection of fuses - Earthing - Testing of installations - Domestic, commercial and industrial installation estimate - Energy auditing - Need of Energy audit and management - Types of Energy audit - Audit Process - Electrical Measurement - Load and Power factor measuring equipment - Energy conservation - Selection of cable - Lighting systems - Pumping systems.
Unit X: Control of Electrical Machines: (15 Questions) :
Control Circuit Components [Switches, Relays, Timers, Contactors] - Simple Motor Control Circuits - DC Motor Control Circuits - Starters, Jogging, Dynamic braking, Plugging, Reversing Control - AC Motor Control Circuits -Starters - 2 Speed Motor Control - Reversing the Rotation of IM - Dynamic braking - Plugging - Industrial Control Circuits [Planner Machine - Skip Hoist - Water pump - Electric Oven - Air Compressor - Over Head Crane - Battery Operated Truck - Conveyor System - Elevator] - PLC -Components of PLC - Operation of PLC - Scan - PLC Memory - i/p and o/p Module - Programming, Programming Devices - Ladder Diagram (Relay, Timer, Counter) - DOL, λ/Δ Starter - EB to Gen - SCADA- DCS..
TNPSC Technical Assistant (Electrical) Exam Pattern 2026
| Paper | Subject | No.of Question | Marks | Duration |
| Paper I | Part A Tamil Eligibility Test | 100 | 150 | 3 Hour |
| Part B General Studies | 75 | 150 | ||
| Part C Aptitude and Mental Ability | 25 | |||
| Paper II | Subject Paper (Electrical) | 200 | 300 | 3 Hour |
TNPSC Exam Date 2026 : Notified Soon
Starting Date of Application Form : Notified Soon
Last Date of Application Form : Notified Soon
TNPSC Technical Assistant (Electrical) Exam Free Online Test Series
Crack TNPSC Technical Assistant (Electrical) Mock Test 2026 with the help of Online Test Series or Free Mock Test. Every Sample Paper in TNPSC Combined Technical Services (CTS) Exam has a designated weightage so do not miss out any Paper. Preprare for TNPSC AE Mock Test and check your test scores.
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TNPSC Technical Assistant (Electrical) Exam Paper 1 - English200 questions • 180 mins • 300 marks
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TNPSC Technical Assistant (Electrical) Exam Paper 2 - English200 questions • 180 mins • 300 marks
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TNPSC Technical Assistant Electrical question answer with solutions are available in Hindi & English. Join MCQ, Important Questions, Question Bank, questions and answers for Free TNPSC Technical Assistant Electrical exam preparation.
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TNPSC Technical Assistant (Electrical) Exam Paper 1 - English200 questions • 180 mins • 200 marks
Free Questions →2
TNPSC Technical Assistant (Electrical) Exam Paper 2 - English200 questions • 180 mins • 200 marks
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FAQs
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