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Attempt KSEB Electrical Sub Engineer Mock Test 2026! If you are preparing for the Sub Engineer (Electrical) post in the Kerala State Electricity Board Limited, you already know the paper is technical, numerical and spread across six modules. Reading books is only half the job. To score well in the 100-mark Kerala PSC paper, you also need regular practice under exam conditions.
That is where a KSEB Sub Engineer mock test helps. In this blog, we explain how the KSEB Sub Engineer electrical online mock test series, how to attempt each test, and how to analyse your result. We have also added a set of question model question papers with answers so you can start right now.
KSEB Electrical Sub Engineer Mock Test 2026: Module-Wise Marks (Basis for Our Mock Tests)
| Module | Subject Area | Marks |
|---|---|---|
| Module I | Basic electrical engineering, network theorems, electromagnetism, instruments, materials | 16 |
| Module II | Power systems, transmission and distribution, protection, traction, energy sources | 20 |
| Module III | Measurements, wiring and illumination | 16 |
| Module IV | Electrical machines | 16 |
| Module V | Analog and digital electronics | 16 |
| Module VI | Power electronics, microprocessors, automation | 16 |
| Total | 100 |
Why Mock Tests Matter for the Kerala PSC Sub Engineer Electrical Exam 2026
1: Between the period of 1858-1947, how many Viceroys ruled over India?
A Kerala PSC Sub Engineer Electrical mock test is not just a score check. It trains you in several ways:
- Speed. You learn to solve numericals such as power factor, transformer EMF, slip and rectifier problems within a minute or two.
- Accuracy. Regular practice reduces silly mistakes in formulas and units.
- Negative marking control. You learn when to attempt and when to skip.
- Module-wise gap finding. You discover whether you are weak in power systems, machines, electronics or automation.
- Exam temperament. Sitting through 100 questions in one go builds stamina and confidence.
- Revision. Every explanation revises a concept you may have forgotten.
Prepare for Kerala PSC Technical Exams with Entri
സർക്കാർ ജോലി എന്ന സ്വപ്നം ഇനി സ്വപ്നം മാത്രമല്ല! Join Kerala's Top-rated PSC Coaching Programs
Join NowKSEB Sub Engineer Electrical Mock Test 2026 on Entri – Attempt Link Here!
- Aligned to the six-module official syllabus
- Exam-style questions with numericals and fact-based MCQs
- Answer explanations after each test
- Performance tracking to show your weak modules and accuracy
- Timed tests to build exam speed
- Updates on Kerala PSC and KSEB notifications in the app
| Mock Test Series | Link |
| Series 1 | |
| Series 2 | |
| Series 3 | |
| Series 4 | |
| Series 5 |
How to Attempt a KSEB Electrical Sub Engineer Online Mock Test 2026
Follow this simple method for every KSEB Sub Engineer practice test:
- Attempt in exam conditions. Sit in a quiet place, set the timer and do not look at notes.
- Start with easy questions. Fact-based questions on IE Rules, instruments or materials save time for numericals.
- Handle numericals smartly. Do quick calculations on rough paper and check units.
- Skip uncertain questions. With negative marking in Kerala PSC papers, avoid blind guesses. Check the notification for the exact rule.
- Mark and return. Flag doubtful questions and revisit them if time is left.
- Never leave the last 5 minutes unused. Use them to review marked questions.
KSEB Sub Engineer Model Questions: 20 Free Practice Questions with Answers
Try this 20-question sample test (3 to 4 questions per module). Give yourself 20 minutes, then check the answers.
Module I: Basic Electrical Engineering
Q1. Three resistors of 10 ohm, 20 ohm and 20 ohm are connected in parallel. The effective resistance is:
(a) 2.5 ohm
(b) 5 ohm
(c) 10 ohm
(d) 50 ohm
Q2. According to the maximum power transfer theorem, maximum power is delivered to the load when:
(a) Load resistance is zero
(b) Load resistance is infinite
(c) Load resistance equals the source (Thevenin) resistance
(d) Load resistance is half the source resistance
Q3. The energy stored in a 100 microfarad capacitor charged to 200 V is:
(a) 1 J
(b) 2 J
(c) 4 J
(d) 20 J
Module II: Power Systems and Utilisation
Q4. Load factor is defined as:
(a) Maximum demand divided by average load
(b) Average load divided by maximum demand
(c) Connected load divided by maximum demand
(d) Maximum demand divided by connected load
Q5. A consumer has a connected load of 50 kW and a maximum demand of 40 kW. The demand factor is:
(a) 0.4
(b) 0.8
(c) 1.0
(d) 1.25
Q6. The Ferranti effect is the rise of:
(a) Sending end voltage over receiving end voltage in a loaded line
(b) Receiving end voltage over sending end voltage in a lightly loaded or open-circuited long line
(c) Frequency in a long line
(d) Current in a short line
Q7. Corona loss in a transmission line can be reduced by:
(a) Using smaller diameter conductors
(b) Using larger diameter conductors
(c) Reducing the spacing between conductors
(d) Using rough conductors
Module III: Measurements, Wiring and Illumination
Q8. An instrument used for measuring insulation resistance is:
(a) Wheatstone bridge
(b) Megger
(c) Potentiometer
(d) Synchroscope
Q9. The Schering bridge is used to measure:
(a) Inductance
(b) Capacitance
(c) Frequency
(d) Low resistance
Q10. According to the inverse square law, the illumination at a point from a point source is inversely proportional to:
(a) The distance
(b) The square of the distance
(c) The cube of the distance
(d) The square root of the distance
Module IV: Electrical Machines
Q11. A 50 Hz transformer winding has 100 turns and a maximum core flux of 0.01 Wb. The induced EMF is approximately:
(a) 111 V
(b) 222 V
(c) 444 V
(d) 2220 V
Q12. An induction motor has a synchronous speed of 1500 rpm and a rotor speed of 1440 rpm. The slip is:
(a) 2 percent
(b) 4 percent
(c) 6 percent
(d) 8 percent
Q13. A DC motor runs on 220 V with an armature current of 20 A and an armature resistance of 0.5 ohm. The back EMF is:
(a) 200 V
(b) 210 V
(c) 220 V
(d) 230 V
Q14. A synchronous motor is:
(a) Self-starting
(b) Not self-starting
(c) Always a single-phase machine
(d) A machine that runs only on DC
Module V: Electronics and Digital Systems
Q15. In a full-wave bridge rectifier, the peak inverse voltage of each diode is:
(a) Vm
(b) 2Vm
(c) Vm/2
(d) 4Vm
Q16. The ripple factor of a full-wave rectifier without a filter is about:
(a) 1.21
(b) 0.482
(c) 0.121
(d) 0.812
Q17. The binary equivalent of decimal 13 is:
(a) 1011
(b) 1101
(c) 1110
(d) 1001
Module VI: Power Electronics, Microprocessors and Automation
Q18. An SCR has how many PN junctions?
(a) 1
(b) 2
(c) 3
(d) 4
Q19. The address bus of the 8085 microprocessor is:
(a) 8 bits wide
(b) 16 bits wide
(c) 32 bits wide
(d) 64 bits wide
Q20. Which control action helps eliminate steady-state error?
(a) Proportional
(b) Derivative
(c) Integral
(d) ON-OFF
Answer Key with Explanations
| Q | Answer | Explanation |
|---|---|---|
| 1 | (b) 5 ohm | 1/R = 1/10 + 1/20 + 1/20 = 0.2, so R = 5 ohm |
| 2 | (c) | Maximum power transfer occurs when load resistance equals source (Thevenin) resistance |
| 3 | (b) 2 J | Energy = 1/2 x C x V squared = 0.5 x 100 x 10^-6 x 200 x 200 = 2 J |
| 4 | (b) | Load factor = average load / maximum demand |
| 5 | (b) 0.8 | Demand factor = maximum demand / connected load = 40/50 |
| 6 | (b) | In lightly loaded or open-circuited long lines, line capacitance makes the receiving end voltage higher |
| 7 | (b) | Larger conductor diameter reduces surface voltage gradient, so corona reduces |
| 8 | (b) Megger | A megger measures insulation resistance |
| 9 | (b) Capacitance | Schering bridge measures capacitance, and also dielectric loss and power factor of capacitors |
| 10 | (b) | Illumination E = I / d squared |
| 11 | (b) 222 V | E = 4.44 x f x N x flux = 4.44 x 50 x 100 x 0.01 = 222 V |
| 12 | (b) 4 percent | Slip = (1500 – 1440) / 1500 = 0.04 |
| 13 | (b) 210 V | Eb = V – Ia x Ra = 220 – 20 x 0.5 = 210 V |
| 14 | (b) | A synchronous motor has no starting torque and needs a starting method such as damper windings |
| 15 | (a) Vm | In a bridge rectifier each diode must block the peak input voltage Vm |
| 16 | (b) 0.482 | Ripple factor of a full-wave rectifier is 0.482 (half-wave is 1.21) |
| 17 | (b) 1101 | 8 + 4 + 0 + 1 = 13 |
| 18 | (c) 3 | SCR is a four-layer PNPN device with three junctions |
| 19 | (b) 16 bits | The 8085 has a 16-bit address bus and can address 64 KB |
| 20 | (c) Integral | Integral action removes steady-state error |
Prepare for Kerala PSC Technical Exams with Entri
സർക്കാർ ജോലി എന്ന സ്വപ്നം ഇനി സ്വപ്നം മാത്രമല്ല! Join Kerala's Top-rated PSC Coaching Programs
Join NowTips to Score Higher in KSEB Sub Engineer Electrical Mock Test 2026
- Take tests regularly. Consistency matters more than one big effort.
- Practise Module II and Module IV numericals daily. They carry the largest share of marks and are formula-driven.
- Keep a formula sheet. Revise it before every test.
- Do not skip fact-based topics. IE Rules, earth resistance values, instruments and materials give quick marks.
- Review explanations of correct answers too. A lucky guess does not mean you know the concept.
- Retake weak tests after a few days. Compare scores to see improvement.
- Replicate the real exam. Use OMR-style marking practice and strict timing in your final mock tests.
Start Your KSEB Sub Engineer Mock Test on the Entri App
Books build the concepts, a study plan builds discipline, and mock tests turn all that preparation into marks. With the Entri app you can:
- Attempt module-wise and full-length online tests
- Get explanations for every question
- Track your accuracy and weak modules
- Revise with previous-year-pattern questions
- Stay updated on Kerala PSC and KSEB notifications
Download the Entri app today and attempt your first KSEB Sub Engineer mock test.
