Summary

• Description:

  The MS Word document comprises CEKENAS Electricity Paper 1 2026 Pre-Mock Exam with Marking Scheme. The PDF version is also available upon your request. The marking scheme is in a different document.

  It was a CEKENAS Form 4 Electricity Paper 1 theory examination testing electrical principles, circuit analysis, domestic wiring, electrical machines, and engineering drawing. An indispensable study resource for KCSE engineering technology students, available for PDF download with marking scheme answers.

  • Month Administered: March/April 2026
  • Duration: 2 ½ Hours
  • Total Marks: 100 Marks
  • Number of Questions: 15 (Questions 1–15)
  • Structure: Section A (48 marks, compulsory short questions 1–10) and Section B (52 marks, choice of four questions from 11–15 [13 marks each]).

  It covers the following topics:

  • Section A
    • Workshop safety and administration (Fire extinguisher types, technician duties, entrepreneurial qualities, workshop hazards, electronic waste classification)
    • DC circuit analysis (Resistor color coding, maximum resistance, power dissipation calculations)
    • Capacitance and electrostatic energy (Capacitor combination, total charge, stored energy calculations)
    • Electromagnetism and magnetic parameters (Electromagnet strength factors, retentivity, permeability)
    • Electrical quantities and measuring instruments (EMF, resistance, current units and meters)
    • Electrical machines (Transformer cooling methods, commutator functions in DC motors and generators, causes of brush sparking)
    • Installation technology (Consumer intake sequence diagram, electric bell schematic diagram, joint box lighting wiring diagram)
    • Workshop bench tools (Metal drilling procedure)
  • Section B
    • Transformer theory and calculations (Transformer energy losses, ideal transformer characteristics, turns ratio, primary and secondary full-load current calculations)
    • Digital electronics and power supplies (Number base conversions decimal/binary, logic gate circuit truth table analysis, bridge rectifier circuit design)
    • AC circuit theory (Phase relationships in pure inductive and capacitive circuits, RLC parallel circuit branch currents, total current, and impedance calculations)
    • Protection, testing, and domestic wiring (Current rating, fusing current, domestic final circuits, insulation resistance to earth testing procedure, two-way switch joint box wiring completion)
    • Engineering drawing (Third angle orthographic projection drawing of a machine block with front elevation, end elevation, plan, and dimensioning)
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  ELECTRICITY
• Posted By:

  Caleb_Peter

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