Summary

• Description:

  The PDF document comprises KALA Joint Trials Metalwork Paper 1 2025 Mock Exam with Marking Scheme.

  It is a KCSE Metalwork Paper 1 (445/1) KALA Examination 2025.

  • Duration: 2 Hours 30 Minutes
  • Total Marks: 100
  • Number of Questions: 15 (Section A: Questions 1–10; Section B: Questions 11–15)
  • Marking Scheme: The marking scheme is in a different document.

  The paper consists of Section A and Section B. Candidates answer all questions in Section A, and in Section B answer Question 11 and any other three questions.

  It covers the following topics:

  • Workshop safety and first aid (burns vs scalds; safety precautions when using a vernier caliper)
  • Measurement and precision tools (parts/functions of a trammel; reading a micrometer; vernier caliper advantages)
  • Cutting fluids (properties of a cutting solution)
  • Furnaces and heat treatment (electric furnace sketch and charges; hotplate tempering technique)
  • Riveting and fastening (common riveting defects; rivet size and spacing calculations)
  • Hand tools and filing (safe edge of a file and its function)
  • Painting/finishing terminology (primer, runs, tears, charging)
  • Sheet metal joints (joggled lap joint; grooved seam)
  • Soldering (steps for tinning a soldering bit)
  • Lathe operations (turning between centres, facing, tapering)
  • Welding (definition; gas welding techniques; arc starting methods; functions of flux; factors affecting weld quality; weld testing)
  • Metal finishing processes (oil blackening)
  • Engineering drawing and projection (orthographic views in first angle projection; isometric projection)
  • Fits and keys (clearance, transition, interference fits; positive locking devices; sunk and saddle keys)
  • Developments and fabrication (development of a rectangular prism; surface development of a metal hood; producing a strong brazed joint)
  • Drilling machine operations (common drilling machine processes)
  • Bench work fabrication (procedure for making a slot on a marking gauge blade)
• Length:

  14 pages
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  METALWORK
• Posted By:

  Caleb_Peter

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