WAEC/GCE 2026/2027 Technical Drawing Essay and Objective Questions and Answers

WAEC/GCE 2026/2027 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

1. It communicates engineering ideas clearly.
2. It assists in construction and manufacturing.
3. It provides accurate dimensions of objects.
4. It serves as a guide for artisans and engineers.
5. It helps in technological development.

QUESTION 2

(a) State five drawing instruments and their uses.

ANSWER

QUESTION 3

Explain the following types of lines used in Technical Drawing:

(i) Hidden detail line

(ii) Centre line

(iii) Dimension line

(iv) Construction line

ANSWER

(i) Hidden Detail Line

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

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

1. Full scale
2. Reducing scale
3. Enlarging scale

QUESTION 6

State five precautions to observe while using drawing instruments.

ANSWER

1. Handle instruments carefully
2. Keep instruments clean
3. Avoid dropping instruments
4. Store instruments properly
5. 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

1. Vertical lines remain vertical
2. Angles between axes are 120°
3. 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