NSI Draughtsman Syllabus

NSI Draughtsman Syllabus 2026 – Complete Topic-wise Breakdown

Byvinay

✓ Verified against National Sugar Institute (NSI) Notification No. 1/2026. All topics for Written and Skill tests reproduced verbatim.

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The National Sugar Institute (NSI), Kanpur, requires Draughtsmen to possess a high degree of precision in mechanical drafting and computer-aided design. The selection process involves a Skill Test (Qualifying) followed by a Written Examination (Merit-based).

Exam Pattern Overview (2026)

StageModeNatureMarks
Stage 1: Skill TestPractical/Trade TestQualifyingPass/Fail
Stage 2: Written TestObjective/SubjectiveMerit-Ranking100 Marks

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  • Written Test Duration: 3 Hours.
  • Skill Test: Focuses on CAD proficiency and manual drawing accuracy.
  • Merit: Final selection is based solely on the Written Test score for candidates who qualify the Skill Test.

Written Examination Syllabus (Verbatim)

1. Fundamental Drawing Principles

  • Nomenclature, description, and use of drawing instruments & various equipment used in drawing office. Their care and maintenance.
  • Layout of a drawing sheet as per B.I.S. (Bureau of Indian Standards).
  • Lines and their meanings; type of lettering, proportion, and spacing of letters and words.
  • Terms & definitions: Polygons and circles.
  • Definition of ellipse, parabola, hyperbola; different methods of their construction.
  • Definition & method of drawing cycloid curves, helix, and spirals.

2. Projections & Geometry

  • Terminology: Feature, functional feature, functional dimension, datum dimension, and principles.
  • Units of dimensioning, systems of dimensioning, and methods for common features.
  • Planes and their normal projections; orthographic projection (First angle and third angle).
  • Projections of solids: Prisms, cones, pyramids, and frustums in various positions.
  • Construction of different types of scales: Principle of R.F., diagonal, and Vernier scales.
  • Sectional views: Importance, types, and parts not shown in section.
  • True shape of surfaces: Solids cut by different cutting planes.
  • Development of surfaces: Industrial need and methods of developing surfaces.
  • Intersections & Interpenetration: Intersection of prisms, cones, pyramids, and cylinders with intersecting axes.

3. Machine Drawing & Fasteners

  • Screw Threads: Terms, nomenclature, types, proportions, uses, and thread conventions.
  • Nuts & Bolts: Types of nuts, bolts, studs, and locking devices (Machine screws, cap screws, set screws).
  • Foundation Bolts: Different types and applications.
  • Riveted Joints: Fastening materials, types of rivets, efficiency of joints, and causes of failure.
  • Welded Joints: Representation (Actual and Symbolic) and Welding Symbols as per BIS.

4. Mechanical Components & Systems

  • Keys, Cotters & Pins: Purpose, types (Heavy/Light duty), and use of cotters and pins.
  • Couplings: Necessity, classification, materials, and proportions of different types.
  • Bearings: Frictional and anti-frictional bearings (Ball, roller, thrust, needle, and taper roller); materials and properties.
  • Power Transmission: Belts (materials, slip, creep, velocity ratio), Pulley ratio, and V-belt drive calculations.
  • Gears: Types of gears (Cast vs. Machined), use of Nomographs for drawing gear profiles.
  • Cams: Types of cams and followers, displacement diagrams, and kinds of motion.
  • Piping: Specifications of W.I. & Steel pipes, pipe threads, and fittings.

5. Advanced Engineering Tools & Principles

  • Engines: Brief description of Petrol, Diesel, and Gas engines.
  • Hydraulics: Working principle of valves, hydraulic jacks, presses, accumulators, and rams.
  • Structural Steel: B.I.S. Specifications for rolled sections, roof truss joints, and supports.
  • Measurement: Precision instruments like Vernier height gauges, micrometers, and gauges.
  • Limits, Fits & Tolerances: Geometrical tolerance, surface finish symbols (grades and micron values), and IS:919/IS:2709 standards.

Skill Test Syllabus (Practical)

Candidates will be assessed on their ability to perform the following tasks:

  1. Documentation: Preparing industrial documents and recording information.
  2. Geometrical Construction: Drawing complex figures using manual instruments.
  3. Orthographic & Sectional Views: Drawing detailed machine parts with proper title blocks and dimensions.
  4. CAD Proficiency: * Creating objects in CAD using toolbars, commands, and menus.
    • 3D Modeling: Creating 3D objects and converting them to 2D projections.
    • Customizing layers, styles, and creating standard templates/callouts.
  5. Assembly & BOM: Creating part lists and Bill of Materials (BOM) for sub-assemblies.
  6. Inspection: Measuring components using gauges and checking for accuracy (ISO tolerances).

Strategic Preparation Guide

  • BIS Standards: Focus heavily on IS:919 (Tolerances) and IS:2709 (Fits). NSI technical exams often ask specific questions about standard symbols used in drawing.
  • CAD Shortcuts: For the Skill Test, master AutoCAD commands (L, O, EX, TR, CO) to save time, as speed is often a qualifying factor.
  • Manual Drawing: Don’t neglect manual lettering and scales. At least 20% of the theory marks often come from fundamental drawing instruments and geometry.
  • Mechanical Knowledge: Since the eligibility requires a Diploma in Mechanical Engineering, expect detailed questions on Thermal Engineering basics (Engines) and Fluid Mechanics (Hydraulic Jack).

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