WAEC 2026 Technical Drawing Essay and Objective Questions and Answers
SECTION A – ESSAY QUESTIONS AND ANSWERS
QUESTION 1
(a) Define Technical Drawing.
(b) State five importance of Technical Drawing.
ANSWER
(a) Definition
Technical Drawing is the graphical representation of objects, ideas, or designs using drawing instruments according to standard conventions.
(b) Importance of Technical Drawing
- It communicates engineering ideas clearly.
- It assists in construction and manufacturing.
- It provides accurate dimensions of objects.
- It serves as a guide for artisans and engineers.
- It helps in technological development.
QUESTION 2
(a) State five drawing instruments and their uses.
ANSWER
| Instrument | Use |
|---|---|
| T-square | Drawing horizontal lines |
| Compass | Drawing circles and arcs |
| Set square | Drawing angles and vertical lines |
| Protractor | Measuring angles |
| Scale rule | Measuring and reducing dimensions |
QUESTION 3
Explain the following types of lines used in Technical Drawing:
(ii) Centre line
(iii) Dimension line
(iv) Construction line
ANSWER
Used to show parts of an object not visible to the eye.
(ii) Centre Line
Used to indicate the centre of circles and symmetrical objects.
(iii) Dimension Line
Used to show measurements and sizes.
(iv) Construction Line
Used as guide lines during drawing.
QUESTION 4
(a) Define Orthographic Projection.
(b) State the difference between first angle and third angle projection.
ANSWER
(a) Meaning of Orthographic Projection
Orthographic projection is the method of representing a three-dimensional object in two dimensions using different views.
(b) Difference
| First Angle Projection | Third Angle Projection |
|---|---|
| Object is between observer and plane | Plane is between observer and object |
| Top view below front view | Top view above front view |
| Common in Europe/Africa | Common in America |
QUESTION 5
(a) Define Scale Drawing.
(b) State three types of scales.
ANSWER
(a) Meaning of Scale Drawing
Scale drawing is the reduction or enlargement of objects proportionally.
(b) Types of Scales
- Full scale
- Reducing scale
- Enlarging scale
QUESTION 6
State five precautions to observe while using drawing instruments.
ANSWER
- Handle instruments carefully
- Keep instruments clean
- Avoid dropping instruments
- Store instruments properly
- Sharpen pencils correctly
QUESTION 7
(a) What is Isometric Drawing?
(b) State three characteristics of isometric drawing.
ANSWER
(a) Meaning
Isometric drawing is a pictorial method of drawing in which the three axes are equally inclined at 120°.
(b) Characteristics
- Vertical lines remain vertical
- Angles between axes are 120°
- Measurements are drawn to scale along isometric axes
WAEC 2026 Technical Drawing Essay and Objective Questions and Answers
SECTION B – OBJECTIVE QUESTIONS (OBJ)
1. Which instrument is used for drawing circles?
A. T-square
B. Set square
C. Compass
D. Divider
Answer: C. Compass
2. A line used to indicate hidden parts is called
A. Border line
B. Centre line
C. Hidden detail line
D. Dimension line
Answer: C. Hidden detail line
3. Orthographic projection is used to represent
A. 1D objects
B. 2D objects
C. 3D objects in 2D views
D. Circular objects only
Answer: C. 3D objects in 2D views
4. The angle between isometric axes is
A. 45°
B. 60°
C. 90°
D. 120°
Answer: D. 120°
5. Which instrument is used for measuring angles?
A. Compass
B. Scale rule
C. Protractor
D. French curve
Answer: C. Protractor
6. A drawing scale of 1:2 means
A. Enlargement
B. Full scale
C. Reduction
D. No scale
Answer: C. Reduction
7. The T-square is mainly used for drawing
A. Curves
B. Circles
C. Horizontal lines
D. Angles
Answer: C. Horizontal lines
8. The line used for dimensioning is
A. Border line
B. Construction line
C. Hidden line
D. Dimension line
Answer: D. Dimension line
9. Which projection method is commonly used in Nigeria?
A. Third angle projection
B. Oblique projection
C. First angle projection
D. Isometric projection
Answer: C. First angle projection
10. Which of these is NOT a drawing instrument?
A. Compass
B. Divider
C. Keyboard
D. Set square
Answer: C. Keyboard
11. Isometric drawing is a form of
A. Orthographic drawing
B. Pictorial drawing
C. Perspective drawing
D. Geometrical drawing
Answer: B. Pictorial drawing
12. A scale of 2:1 represents
A. Reduction
B. Enlargement
C. Full size
D. Half size
Answer: B. Enlargement
13. The main purpose of construction lines is to
A. Decorate the drawing
B. Guide the drawing process
C. Show hidden parts
D. Show dimensions
Answer: B. Guide the drawing process
14. Which pencil grade is commonly used for technical drawing?
A. 8B
B. HB
C. 9B
D. EE
Answer: B. HB
15. Which instrument is used for drawing irregular curves?
A. French curve
B. T-square
C. Compass
D. Divider
Answer: A. French curve
16. Which instrument is used for transferring measurements?
A. Compass
B. Divider
C. Protractor
D. T-square
Answer: B. Divider
17. Border lines are usually drawn
A. Very thin
B. Dashed
C. Thick
D. Curved
Answer: C. Thick
18. A hidden detail line is represented by
A. Long dashes and dots
B. Continuous thick line
C. Short dashes
D. Zigzag line
Answer: C. Short dashes
19. Which projection gives a pictorial view of an object?
A. Orthographic projection
B. Isometric projection
C. First angle projection
D. Sectional projection
Answer: B. Isometric projection
20. The instrument used for drawing vertical lines together with T-square is
A. Compass
B. French curve
C. Set square
D. Divider
Answer: C. Set square
21. A scale of 1:1 means
A. Enlargement
B. Reduction
C. Full size
D. Double size
Answer: C. Full size
22. The process of representing a solid object on paper is called
A. Projection
B. Construction
C. Scaling
D. Sketching
Answer: A. Projection
23. Which of the following is NOT a type of projection?
A. Orthographic
B. Isometric
C. Oblique
D. Circular
Answer: D. Circular
24. The angle used in isometric drawing is
A. 30°
B. 45°
C. 60°
D. 90°
Answer: A. 30°
25. Which line type is used for outlines?
A. Dashed line
B. Thick continuous line
C. Chain line
D. Construction line
Answer: B. Thick continuous line
26. The instrument used for drawing arcs is
A. Compass
B. Divider
C. Set square
D. Scale rule
Answer: A. Compass
27. Dimension figures should be written
A. Slantly
B. Vertically only
C. Clearly and neatly
D. Randomly
Answer: C. Clearly and neatly
28. The main purpose of sectioning is to
A. Beautify drawing
B. Show internal details
C. Increase size
D. Reduce dimensions
Answer: B. Show internal details
29. In first angle projection, the top view is drawn
A. Above front view
B. Beside front view
C. Below front view
D. Inside front view
Answer: C. Below front view
WAEC 2026 Technical Drawing Essay and Objective Questions and Answers
30. Which instrument is used to clean pencil marks?
A. Eraser
B. Divider
C. Compass
D. Set square
Answer: A. Eraser
31. The drawing board is mainly used for
A. Supporting drawing sheet
B. Measuring angles
C. Drawing curves
D. Dimensioning
Answer: A. Supporting drawing sheet
32. Which line is used for dimension extension?
A. Thick line
B. Thin continuous line
C. Dashed line
D. Border line
Answer: B. Thin continuous line
33. Oblique drawing is a type of
A. Perspective drawing
B. Pictorial drawing
C. Orthographic drawing
D. Geometrical drawing
Answer: B. Pictorial drawing
34. Which projection is mostly used by engineers?
A. Orthographic projection
B. Oblique projection
C. Perspective projection
D. Artistic projection
Answer: A. Orthographic projection
35. The metric unit commonly used in technical drawing is
A. Metre only
B. Millimetre
C. Kilometre
D. Centigram
Answer: B. Millimetre
36. A circle drawn in isometric appears as
A. Square
B. Ellipse
C. Triangle
D. Rectangle
Answer: B. Ellipse
37. Which instrument helps in drawing irregular curves smoothly?
A. Divider
B. French curve
C. Compass
D. Protractor
Answer: B. French curve
38. Dimension lines terminate with
A. Circles
B. Arrows
C. Squares
D. Dots
Answer: B. Arrows
39. The process of reducing or enlarging a drawing proportionally is called
A. Dimensioning
B. Projection
C. Scaling
D. Sectioning
Answer: C. Scaling
40. Which of these is a freehand drawing?
A. Sketch
B. Orthographic projection
C. Scale drawing
D. Instrumental drawing
Answer: A. Sketch
41. A plane figure with six sides is called
A. Pentagon
B. Hexagon
C. Octagon
D. Septagon
Answer: B. Hexagon
42. The centre line is usually drawn using
A. Thick continuous lines
B. Dashed lines only
C. Long and short dashes
D. Zigzag lines
Answer: C. Long and short dashes
43. Which drawing instrument is used for measuring lengths accurately?
A. Scale rule
B. Compass
C. Set square
D. Protractor
Answer: A. Scale rule
44. An angle greater than 90° but less than 180° is
A. Acute angle
B. Reflex angle
C. Right angle
D. Obtuse angle
Answer: D. Obtuse angle
45. Which pencil grade is harder?
A. 6B
B. HB
C. 2H
D. 8B
Answer: C. 2H
46. A cone has how many curved surfaces?
A. One
B. Two
C. Three
D. Four
Answer: A. One
47. Development of surfaces is important in
A. Sheet metal work
B. Carpentry only
C. Painting
D. Bricklaying only
Answer: A. Sheet metal work
48. Which of the following is NOT a polygon?
A. Pentagon
B. Circle
C. Hexagon
D. Octagon
Answer: B. Circle
49. The point where two arcs intersect during construction is called
A. Vertex
B. Centre
C. Intersection point
D. Radius
Answer: C. Intersection point
50. Which projection gives realistic appearance?
A. Perspective projection
B. Orthographic projection
C. First angle projection
D. Sectional projection
Answer: A. Perspective projection
51. A prism is named according to the shape of its
A. Height
B. Base
C. Side
D. Surface
Answer: B. Base
WAEC 2026 Technical Drawing Essay and Objective Questions and Answers
52. The line used to indicate cutting plane is
A. Dimension line
B. Border line
C. Cutting plane line
D. Construction line
Answer: C. Cutting plane line
53. Which of these is NOT a solid figure?
A. Sphere
B. Cylinder
C. Cube
D. Triangle
Answer: D. Triangle
54. The shortest distance between two points is
A. Arc
B. Curve
C. Straight line
D. Radius
Answer: C. Straight line
55. Which instrument is mainly used with set squares?
A. French curve
B. T-square
C. Compass
D. Divider
Answer: B. T-square
56. The purpose of hatching in sectional drawing is to
A. Decorate drawing
B. Show cut surfaces
C. Show hidden details
D. Show dimensions
Answer: B. Show cut surfaces
57. Which of these angles is acute?
A. 30°
B. 100°
C. 120°
D. 180°
Answer: A. 30°
58. A line joining two points on a circle is called
A. Diameter
B. Radius
C. Chord
D. Tangent
Answer: C. Chord
59. The standard paper size commonly used in technical drawing is
A. Foolscap
B. A-series paper
C. Newspaper sheet
D. Cardboard
Answer: B. A-series paper
60. Which instrument is used to hold drawing paper firmly on the board?
A. Thumb pins
B. Compass
C. Divider
D. Scale rule
Answer: A. Thumb pins
