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TNPSC ITI Engineering Drawing & Draughtsman (Mech & Civil) (Code 551) Syllabus

TNPSC ITI Engineering Drawing & Draughtsman (Mech & Civil) (Code 551) Syllabus

"For aspirants preparing for the Tamil Nadu Public Service Commission (TNPSC) examinations in Trade: Engineering Drawing and Draughtsman (Mechanical and Civil) (ITI Standard) with Subject Code 551, a precise understanding of the official syllabus is paramount. This subject encompasses a wide range of topics, from fundamental drawing techniques and geometrical constructions to advanced projections, mechanical components, and Computer-Aided Drafting (CAD). This comprehensive guide meticulously details each unit, outlining critical areas for effective preparation, with the examination offered in both English and Tamil languages."

"Official Syllabus Breakdown: TNPSC ITI Engineering Drawing & Draughtsman (Mechanical and Civil) (Code 551)"

"The following provides a detailed overview of the TNPSC ITI Engineering Drawing and Draughtsman (Mechanical and Civil) (Code 551) syllabus. Aspirants should systematically cover these units to ensure comprehensive preparation for the examination."

"Unit I: Drawing Instruments and their Uses, Sheet Layout, Types of Lines, Lettering and Dimensioning (20 Questions)"

  • "Drawing Instruments and their Uses: Drawing board, 'T' Square, Mini Drafter, Set squares, Scales, Protractor."
  • "Sheet Layout: Standard sheet layouts (e.g., A0, A1, A2, A3, A4 sizes), different layouts for designated sheets, and title block conventions."
  • "Types of Lines: Various line types as per BIS (Bureau of Indian Standards) specifications (e.g., continuous thick, thin, dashed, chain lines) and their applications."
  • "Lettering and Spacing: Different methods of lettering (uppercase, lowercase, numerals) and appropriate spacing for clarity."
  • "Dimensioning Techniques:
    • "Types of arrowheads."
    • "Unidirectional and Aligned systems of dimensioning."
    • "Functional, non-functional, auxiliary, or reference dimensions."
    • "Dimensioning common features like holes, rounds, chamfers."
    "

"Unit II: Geometrical Figures, Special Curves, Free Hand Sketching and Scales (25 Questions)"

  • "Geometrical Figures:
    • "Angles: Acute, right, obtuse, straight, reflex, adjacent angles."
    • "Construction of Triangles, Quadrilaterals, Polygons (up to hexagon/octagon)."
    • "Tangency Construction: Drawing tangents to circles and arcs."
    "
  • "Special Curves:
    • "Conic Sections: Ellipses, Parabolas, and Hyperbolas (various methods of construction)."
    • "Cycloidal Curves: Cycloids, Epicycloids, and Hypocycloids."
    "
  • "Free Hand Sketching: Principles and techniques for effective freehand sketching."
  • "Scales: Construction and use of various types of scales (Plain scale, Diagonal scale, Vernier scale)."

"Unit III: Projections of Points, Lines, Planes, Solids and Sectional Views (30 Questions)"

  • "Projection of Points: In different quadrants (1st, 2nd, 3rd, 4th)."
  • "Projection of Lines:
    • "Parallel and perpendicular to planes (HP and VP)."
    • "Inclined to one plane and both planes (True length, True inclination)."
    "
  • "Projection of Planes:
    • "Parallel and perpendicular to planes."
    • "Inclined to one plane and both planes."
    "
  • "Projection of Solids:
    • "Cubes, Cuboids, Prisms, Pyramids (square, triangular, pentagonal, hexagonal base)."
    • "Cylinders, Cones, and Spheres."
    • "Projections of their frustums."
    "
  • "Sectional Views:
    • "Types of sectional views (full, half, revolved, removed)."
    • "Understanding cutting planes and their representation."
    • "Conventional signs, symbols, and abbreviations used in engineering drawings."
    "

"Unit IV: Hatching Techniques in Sectional View, Assembly View and Development of Surfaces (20 Questions)"

  • "Hatching Techniques in Sectional View:
    • "Standard hatching angles (e.g., 45 degrees)."
    • "Hatching for assemblies (different components, different directions)."
    • "Hatching for large areas."
    "
  • "Assembly View: Principles and drawing of assembly views from individual component details."
  • "Orthographic Projections from Pictorial Views: Deriving orthographic (multiview) projections from given isometric or perspective views."
  • "Development of Surfaces: Methods for developing surfaces of various solids like prisms, cylinders, pyramids, and cones (e.g., parallel line, radial line development)."

"Unit V: Isometric, Perspective and Oblique Projection (20 Questions)"

  • "Isometric Projection:
    • "Drawing isometric projections for various solids and their frustums."
    • "Generating isometric views from given orthographic views."
    • "Distinction between isometric view and isometric projection (isometric scale)."
    "
  • "Perspective Projection:
    • "Principles of visual ray method."
    • "Principles of vanishing point method."
    "
  • "Oblique Projection: Principles, types (cavalier, cabinet), and advantages of oblique projection."

"Unit VI: Screw Threads, Bolts, Nuts, Washers, Screws, Locking Devices and Foundation Bolts (30 Questions)"

  • "Screw Threads:
    • "Nomenclature of screw threads (e.g., major diameter, minor diameter, pitch, lead, helix angle)."
    • "Proportions, uses, and types: external, internal, right/left hand, single/multiple start."
    • "'V' threads (e.g., BSW - British Standard Whitworth, BSF - British Standard Fine), Square threads, Acme threads."
    "
  • "Nuts and Bolts: Drawing various types of nuts (hexagonal, square, dome, cap, knurled, flanged, slotted, jam, castle, ring) and bolts (e.g., hexagonal, square, eye bolt)."
  • "Washers and Screws: Types and applications of washers, and various types of screws (e.g., machine screws, wood screws, self-tapping screws)."
  • "Locking Devices:
    • "Lock washer, Spring washer, Split pin, Cotter pin."
    • "Locking plate, Jam nut, Castle nut, Set screw."
    • "Penn Ring or Grooved Nut."
    "
  • "Foundation Bolts: Types of foundation bolts (Eye bolt, Rag bolt, Lewis bolt, Cotter bolt) and their uses."

"Unit VII: Rivets, Riveted Joints, Welded Joints, Weld Symbols, Pipe Joints and Carpentry Joints (25 Questions)"

  • "Rivets and Riveted Joints:
    • "Different types of rivets (e.g., snap head, pan head, counter-sunk head)."
    • "Types of riveted joints: Lap joint, Butt joint."
    • "Single/double riveted, chain/zig-zag riveting."
    "
  • "Welded Joints: Types of welded joints (e.g., butt, lap, corner, T-joint)."
  • "Weld Symbols: Understanding and interpreting various weld symbols as per standards."
  • "Pipe Joints:
    • "Flanged joint."
    • "Spigot and Socket joint."
    • "Threaded joint."
    • "Expansion joint."
    "
  • "Carpentry Joints:
    • "Lap joint, Butt joint."
    • "Mitre joint, Mortise and Tenon joint."
    • "Dovetail joint."
    "

"Unit VIII: Electrical, Electronics, IT and Network Components (20 Questions)"

  • "Electrical Symbols and Wiring Diagrams: Standard electrical symbols, wiring diagrams for domestic and industrial applications, and types of internal wiring."
  • "Basic Electronic Components and Circuits:
    • "Half-wave, full-wave, and bridge rectifiers."
    • "Zener diode, LED (Light Emitting Diode), LDR (Light Dependent Resistor), photodiode."
    • "Transistor (BJT), UJT (Unijunction Transistor), FET (Field Effect Transistor)."
    • "SCR (Silicon Controlled Rectifier), DIAC, TRIAC."
    • "IC 555 timer, Operational Amplifier (Op-Amp)."
    "
  • "Logic Gates: Various logic gates (AND, OR, NOT, NAND, NOR, XOR, XNOR) and their truth tables."
  • "Network Components: Modems, Firewalls, Hubs, Bridges, Routers, Gateways, Repeaters, Transceivers, Switches, Access points."
  • "Network Topologies: Star, Ring, Bus, Tree, Mesh, Hybrid topologies."

"Unit IX: Mechanical, Automobile, RAC Components, Layout, Circuit and Block Diagram (20 Questions)"

  • "Mechanical Symbols: Standard mechanical symbols for various components (e.g., gears, bearings, springs, shafts)."
  • "Automobile Components: Symbols for automobile components (e.g., bulb indicator, cruise control, ABS indicator, battery, engine)."
  • "Layout and Circuit Diagrams:
    • "Layout and circuit diagrams for different mechanical systems."
    • "Automobile systems (e.g., braking system, steering system, ignition system)."
    • "Refrigeration and Air Conditioning (RAC) systems: Basic refrigeration cycles (Vapour Compression, Vapour Absorption), air conditioning systems."
    • "Circuit diagrams for electrical components in RAC systems."
    "

"Unit X: Computer Aided Drafting (CAD) (10 Questions)"

  • "Computer Basics: Introduction to computer hardware and software."
  • "Operating Systems and File Management: Windows operating system basics, file and folder management."
  • "Software Installation: Basic procedures for software installation."
  • "Introduction to CAD:
    • "Definition and advantages of CAD."
    • "CAD interface: Main menu, screen menu, command line, model space, layout space."
    • "Drawing layouts and toolbars."
    • "File operations: Create, save, open files."
    • "Creating drawing sheets as per ISO standards."
    "
  • "Coordinate Systems in CAD: Absolute, Polar, and Relative coordinate systems."
  • "CAD Tools:
    • "Drawing tools (e.g., line, circle, arc, rectangle, polygon)."
    • "Editing tools (e.g., trim, extend, offset, mirror, move, copy, rotate)."
    "
"Important Note for Aspirants: This comprehensive syllabus for Trade: Engineering Drawing and Draughtsman (Mechanical and Civil) (Code 551) at the ITI Standard provides a robust framework for examination preparation. Aspirants are strongly advised to meticulously cover all topics, focusing on both theoretical understanding and practical application of drawing principles, component representations, and CAD software usage. Consistent revision and practice with drawing exercises are essential for success in this competitive examination."

"Success in the TNPSC Engineering Drawing and Draughtsman (Mechanical and Civil) (Code 551) examination requires a disciplined and strategic approach. By mastering fundamental drawing techniques, understanding projections, familiarising with various mechanical and civil components, and gaining proficiency in CAD basics, aspirants can significantly enhance their performance and achieve their career objectives."

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