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NALCO Technician Free Mock Test
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NALCO Technician (Electrical) Grade III Syllabus 2026, Exam Pattern
NALCO Technician Syllabus 2026, Exam Pattern, Exam Date 2026
Detail Information about NALCO has published notification 2026 for the recruitment of Technician (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.
NALCO Technician Syllabus 2026 - Overview
| Organization Name | National Aluminium Company Limited (NALCO) |
| Post Name | Technician Electrical (Non Executive) |
| No of Posts | 35 |
| Application Mode | Online |
| Category | Syllabus and Exam Pattern |
| Selection Process | Computer Based Test (CBT) Trade Test (for select posts) Document Verification Pre-employment Medical Examination (PEME) |
| Official website | nalcoindia.com |
NALCO Technician (Electrical) Syllabus 2026
Technical Subject : (Expected)
1. Basic Electrical & Circuit Theory :
Fundamentals of Electricity: Atomic structure, voltage, current, resistance, Ohm’s Law, and Kirchhoff’s Laws (KVL/KCL).
Resistors, Capacitors, and Inductors: Series and parallel combinations, color coding, and heating effects of electric current.
Magnetic Circuits: Concepts of flux, reluctance, permeability, electromagnetism, and Faraday's Laws of Electromagnetic Induction.
2. AC Fundamentals and Polyphase Systems :
Alternating Current (AC): RMS value, peak value, average value, form factor, and peak factor.
Single-Phase Circuits: Active, reactive, and apparent power, power factor correction.
Three-Phase Systems: Star and Delta connections, relation between line and phase values, and 3-phase power measurement.
3. Electrical Machines :
DC Generators & Motors: Construction, working principles, types (series, shunt, compound), EMF equation, torque equation, speed control, and starters.
Transformers: Single-phase and three-phase transformers, core and shell types, transformation ratio, open-circuit and short-circuit tests, losses, and efficiency.
Alternators & Synchronous Motors: Generation of 3-phase EMF, winding factors, regulation, and starting methods.
Induction Motors: 3-phase squirrel cage and slip-ring induction motors, slip, torque-slip characteristics, starters (DOL, Star-Delta, Auto-transformer), and fractional horsepower single-phase motors.
4. Electrical Measuring Instruments :
Measurement Basics: Classification of instruments (indicating, integrating, recording).
Common Meters: Working principles of PMMC and Moving Iron instruments, Ammeters, Voltmeters, Wattmeters, Energy meters, Megger (insulation tester), and Multimeters.
5. Power Systems: Generation, Transmission & Distribution :
Generation & Distribution: Basics of thermal, hydro, and non-conventional energy power plants. Basics of underground cables and overhead transmission lines.
Substations: Equipment used in electrical substations, insulators, lightning arrestors, and earthing/grounding techniques (pipe and plate earthing).
6. Electrical Wiring, Safety, and Commercial Operations :
Wiring Systems: Types of domestic and industrial wiring, selection of cables/wires, switches, fuses, Miniature Circuit Breakers (MCBs), and ELCBs/RCCBs.
Safety Practices: IE Rules (Indian Electricity Rules) regarding safety precautions, treatment for electric shock, and first-aid measures.
7. Basic Electronics :
Semiconductor Devices: Diodes, transistors (BJT, FET), rectifiers (half-wave, full-wave, bridge), and basics of regulated power supplies.
Fundamentals of Electricity: Atomic structure, voltage, current, resistance, Ohm’s Law, and Kirchhoff’s Laws (KVL/KCL).
Resistors, Capacitors, and Inductors: Series and parallel combinations, color coding, and heating effects of electric current.
Magnetic Circuits: Concepts of flux, reluctance, permeability, electromagnetism, and Faraday's Laws of Electromagnetic Induction.
2. AC Fundamentals and Polyphase Systems :
Alternating Current (AC): RMS value, peak value, average value, form factor, and peak factor.
Single-Phase Circuits: Active, reactive, and apparent power, power factor correction.
Three-Phase Systems: Star and Delta connections, relation between line and phase values, and 3-phase power measurement.
3. Electrical Machines :
DC Generators & Motors: Construction, working principles, types (series, shunt, compound), EMF equation, torque equation, speed control, and starters.
Transformers: Single-phase and three-phase transformers, core and shell types, transformation ratio, open-circuit and short-circuit tests, losses, and efficiency.
Alternators & Synchronous Motors: Generation of 3-phase EMF, winding factors, regulation, and starting methods.
Induction Motors: 3-phase squirrel cage and slip-ring induction motors, slip, torque-slip characteristics, starters (DOL, Star-Delta, Auto-transformer), and fractional horsepower single-phase motors.
4. Electrical Measuring Instruments :
Measurement Basics: Classification of instruments (indicating, integrating, recording).
Common Meters: Working principles of PMMC and Moving Iron instruments, Ammeters, Voltmeters, Wattmeters, Energy meters, Megger (insulation tester), and Multimeters.
5. Power Systems: Generation, Transmission & Distribution :
Generation & Distribution: Basics of thermal, hydro, and non-conventional energy power plants. Basics of underground cables and overhead transmission lines.
Substations: Equipment used in electrical substations, insulators, lightning arrestors, and earthing/grounding techniques (pipe and plate earthing).
6. Electrical Wiring, Safety, and Commercial Operations :
Wiring Systems: Types of domestic and industrial wiring, selection of cables/wires, switches, fuses, Miniature Circuit Breakers (MCBs), and ELCBs/RCCBs.
Safety Practices: IE Rules (Indian Electricity Rules) regarding safety precautions, treatment for electric shock, and first-aid measures.
7. Basic Electronics :
Semiconductor Devices: Diodes, transistors (BJT, FET), rectifiers (half-wave, full-wave, bridge), and basics of regulated power supplies.
General English :
1. Joining Sentences
2. Substitution
3. Passage Completion
4. Idioms and Phrases
5. Sentence
6. Completion
7. Error Correction (Phrase in Bold)
8. Antonyms
9. Active and Passive Voice
10. Substitution
11. Sentence Improvement
12. Synonyms
13. Spelling Test
14. Error Correction (Underlined Part)
15. Transformation
16. Prepositions
17. Sentence Arrangement
18. Fill in the blanks
19. Spotting Errors
20. Para Completion
Quantitative Aptitude :
1. Mixtures and Allegations
2. Mensuration
3. Permutations and Combinations
4. Problems on L.C.M and H.C.F
5. Pipes and Cisterns
6. Odd Man Out
7. Quadratic Equations
8. Probability
9. Profit and Loss
10. Simplification and Approximation
11. Percentages
12. Simple Equations
13. Problems on Numbers
14. Time and Work Partnership
15. Ratio and Proportion
16. Boats and Streams
17. Simple Interest
18. Time and Distance
19. Problems on Trains
20. Areas
21. Races and Games
22. Numbers and Ages
23. Averages
24. Indices and Surds
25. Compound Interest
26. Volumes
Reasoning :
1. Analogy
2. Series Completion
3. Verification of truth of the Statement
4. Situation Reaction Test
5. Direction Sense Test
6. Classification
7. Data Sufficiency
8. Alpha- Numeric Sequence Puzzle
9. Dot Situation
10. Identical figure groupings
11. Forming figures and analysis
12. Construction of squares and Triangles
13. Series
14. Analytical Reasoning
15. Paper Folding
16. Paper Cutting
17. Cubes and Dice
18.Water Images
19. Mirror Images
20. Figure Matrix
21. Completion Incomplete Pattern
22. Spotting embedded figures
23. Classification
24. Rules Detection
25. Puzzle Test
26. Blood Relations
27. Coding-Decoding
28. Assertion and Reasoning
29. Arithmetical Reasoning
30. Operations of Mathematics
31. Venn Diagrams
32. Word Sequence
33. Missing Characters
34. Sequential Output training
35. Directions
36. Test on Alphabets
37. Eligibility Test
General Knowledge :
1. Important Days
2. Indian History
3. Books and Authors
4. Awards and Honors
5. Indian National Movement
6. Sports
7. Current Affairs – National and International
8. Abbreviations
9. General Policy
10. Science and Technology
11. Science – Inventions & Discoveries
12. Capitals of India
13. Indian Economy
14. Budget and Five Year Plans
15. Countries and Capitals
16. International and National Organizations
NALCO Technician (Electrical) Exam Pattern 2026
There will be no negative marking for wrong answer.
Medium of Exam : Hindi & English
Duration : 120 Minutes
Exam Date 2026 : Notified Soon
Starting Date of Application Form : 21st May 2026
Last Date of Application Form : 10th June 2026
Total Post : 35
Medium of Exam : Hindi & English
Duration : 120 Minutes
| S.No | Subject | No.of Question | Marks |
| 1 | Technical Subject | 60 | 60 |
| 2 | Quantitative Aptitude, Reasoning, General Knowledge & English | 40 | 40 |
| Total | 100 | 100 |
Exam Date 2026 : Notified Soon
Starting Date of Application Form : 21st May 2026
Last Date of Application Form : 10th June 2026
Total Post : 35
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NALCO Technician Exam Free Online Question Bank
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Combo - 3 (English)
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2. Question Bank - 1000 Questions with Answer.
3. 1500 (+) Current Affairs MCQ with Answer PDF in English.
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3. Printed Material 10 Mock Test Papers with OMR Sheet.
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5. 1000 (+) GK MCQ with Answer PDF Book in Hindi.
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4. 1500 (+) Current Affairs MCQ with Answer PDF in Hindi.
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Combo - 6 (English)
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2. Question Bank - 2000 Questions with Answer.
3. Printed Material 10 Mock Test Papers with OMR Sheet.
4. 1500 (+) Current Affairs MCQ with Answer PDF in English.
5. 1000 (+) GK MCQ with Answer PDF Book in English.
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4. 1500 (+) Current Affairs MCQ with Answer PDF in English.
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Combo - 7 (Hindi)
1. Online Mock Test Series in Hindi = 16 Tests.
2. Question Bank - 2000 Questions with Answer.
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5. 1500 (+) Current Affairs MCQ with Answer PDF in Hindi.
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5. 1500 (+) Current Affairs MCQ with Answer PDF in Hindi.
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Combo - 8 (English)
1. Online Mock Test Series in English = 17 Tests.
2. Question Bank - 2000 Questions with Answer.
3. Printed Material 10 Mock Test Papers with OMR Sheet.
4. EBook of NALCO Technician (1000 MCQ) PDF Format in English.
5. 1500 (+) Current Affairs MCQ with Answer PDF in English.
6. 1000 (+) GK MCQ with Answer PDF Book in English.
2. Question Bank - 2000 Questions with Answer.
3. Printed Material 10 Mock Test Papers with OMR Sheet.
4. EBook of NALCO Technician (1000 MCQ) PDF Format in English.
5. 1500 (+) Current Affairs MCQ with Answer PDF in English.
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FAQs
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