2026 NECO Practical Technical Drawing examination Questions and Answers
PAPER III – PRACTICAL (PROPOSED PRACTICE QUESTIONS)
Time: 3 Hours
Instructions:
- Answer Question 1 and any TWO other questions.
- Use drawing instruments only.
- All construction lines should be neat and light.
- Dimension where necessary.
- Show all construction details.
- Draw to the scale specified in each question.
QUESTION 1 (Compulsory) – Orthographic Projection (40 Marks)
A machine block has the following dimensions:
- Length = 100 mm
- Width = 70 mm
- Height = 60 mm
- A through hole of diameter 30 mm is located centrally on the top face.
- A rectangular notch measuring 30 mm × 20 mm × 20 mm is removed from one corner.
Task
a. The Front Elevation
b. The Plan
c. The Right End Elevation
Include hidden detail and centre lines where appropriate.
Marking Guide
- Layout and projection – 10 marks
- Accuracy of dimensions – 10 marks
- Hidden details and centre lines – 8 marks
- Line quality – 6 marks
- Neatness – 6 marks
QUESTION 2 – Isometric Drawing (30 Marks)
Using the orthographic views provided below (or based on Question 1), produce an Isometric View of the object.
Requirements:
- Draw to full scale.
- Do not use an isometric scale.
- Show all visible edges only.
Marking Guide
- Construction – 10 marks
- Correct proportions – 8 marks
- Accuracy – 6 marks
- Line quality – 6 marks
2026 NECO Practical Technical Drawing examination Questions and Answers
QUESTION 3 – Development of Surfaces (30 Marks)
A right circular cylinder has:
- Diameter = 60 mm
- Height = 90 mm
The cylinder is cut by a vertical plane to create an opening measuring 30 mm × 40 mm.
Task
Draw:
a. The elevation.
b. The plan.
c. The complete development of the lateral surface showing the opening.
Marking Guide
- Projection – 8 marks
- Development accuracy – 12 marks
- Dimensions – 5 marks
- Neatness – 5 marks
2026 NECO Practical Technical Drawing examination Questions and Answers
QUESTION 4 – Circle Geometry and Tangency (30 Marks)
Construct the following accurately:
- A circle of radius 50 mm.
- An external point 80 mm from the centre.
- Draw two tangents from the external point to the circle.
- Construct the angle between the tangents.
- Show all construction lines.
Marking Guide
- Construction method – 12 marks
- Accuracy – 10 marks
- Presentation – 8 marks
QUESTION 5 – Cam Construction (30 Marks)
A radial cam has:
- Base circle radius = 25 mm
- Roller follower radius = 10 mm
- Lift = 35 mm
- Angle of ascent = 120°
- Dwell = 60°
- Return = 120°
- Remaining angle = dwell
Task
Construct the cam profile and show the follower positions.
Marking Guide
- Division of angles – 8 marks
- Cam profile – 12 marks
- Accuracy – 5 marks
- Neatness – 5 marks
QUESTION 6 – Sectional Drawing (30 Marks)
The object shown has:
- Base = 100 mm × 80 mm
- Height = 60 mm
- Central cylindrical hole of diameter 40 mm
- Uniform wall thickness of 10 mm
Task
Draw:
a. Full sectional front elevation.
b. Plan.
c. Apply correct hatching conventions.
Marking Guide
- Sectioning – 12 marks
- Projection – 8 marks
- Hatching – 5 marks
- Presentation – 5 marks
QUESTION 7 – Building Drawing (30 Marks)
Draw, to a scale of 1:100, the floor plan of a single-room office with the following specifications:
- Overall dimensions: 6 m × 5 m
- Wall thickness: 225 mm
- One entrance door: 900 mm
- Two windows: 1200 mm × 1200 mm
- One internal office table measuring 1500 mm × 750 mm
- One filing cabinet
- Appropriate dimension lines and labels
Marking Guide
- Scale accuracy – 8 marks
- Symbols and conventions – 8 marks
- Dimensions – 6 marks
- Neatness and layout – 8 marks
These seven practice questions cover the major practical competencies typically assessed in senior secondary Technical Drawing: orthographic projection, isometric drawing, developments, geometrical constructions, cams, sectional views, and building drawing. They are intended for realistic exam preparation and are not actual 2026 NECO examination questions.
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