Examination on Basic Technology
Class: JSS 3
Term: First Term
Time: 1 Hour
Total Marks: 70

SECTION A: OBJECTIVES (40 Marks)
Instruction: Answer all questions.

1. ________ is the chosen profession or occupation that an individual follows throughout their working life. (a) Hobby (b) Career (c) Pastime (d) Vocation
2. The process of reducing the moisture content in timber to improve its stability and strength is called ________. (a) Felling (b) Seasoning (c) Conversion (d) Preservation
3. Which of the following is a pictorial drawing type that shows an object with its axes at 120 degrees to each other? (a) Oblique (b) Perspective (c) Isometric (d) Orthographic
4. An alloy is created to combine the desirable properties of different metals or elements. The main reason for alloying is to ________. (a) increase weight (b) improve properties (c) reduce cost (d) change colour
5. Which of these is NOT a natural defect found in wood? (a) Knot (b) Shake (c) Warping (d) Wormhole
6. The ________ of wood involves sawing logs into planks, boards, or other usable forms. (a) felling (b) seasoning (c) conversion (d) preservation
7. All of these are examples of career paths in Basic Technology EXCEPT ________. (a) Engineering (b) Carpentry (c) Medicine (d) Architecture
8. Which of these materials is typically produced by firing clay at high temperatures? (a) Plastic (b) Metal (c) Ceramic (d) Glass
9. The process of converting raw latex into a more durable and elastic rubber is known as ________. (a) polymerization (b) vulcanization (c) moulding (d) extrusion
10. Brass is a common alloy made primarily from copper and ________. (a) tin (b) lead (c) zinc (d) nickel
11. ________ projection is a technical drawing method used to represent a 3D object in 2D by showing multiple views (front, top, side). (a) Isometric (b) Oblique (c) Perspective (d) Orthographic
12. Which of the following is a manufactured board made from wood fibres pressed together with resin? (a) Plywood (b) Hardboard (c) Chipboard (d) Solid wood
13. The ability of a metal to be drawn into thin wires without breaking is called ________. (a) malleability (b) ductility (c) hardness (d) toughness
14. One-point perspective drawing features a single ________ point on the horizon line. (a) vanishing (b) focal (c) central (d) projection
15. Which of these is NOT a method of preserving timber? (a) Painting (b) Creosoting (c) Air seasoning (d) Chemical treatment
16. Steel is an alloy primarily composed of iron and ________. (a) copper (b) aluminium (c) carbon (d) zinc
17. The method of orthographic projection where the object is imagined to be in the first quadrant is called the ________ angle projection. (a) first (b) second (c) third (d) fourth
18. All of these are general properties of ceramics EXCEPT ________. (a) High melting point (b) Brittleness (c) Good electrical conductivity (d) Chemical inertness
19. A blueprint is a detailed technical drawing used in construction and manufacturing to show how a structure or product should be ________. (a) designed (b) marketed (c) manufactured (d) sold
20. The process of cutting down trees for commercial purposes is known as ________. (a) logging (b) milling (c) deforestation (d) felling
21. Which of the following defects in wood is characterized by separation of wood fibers along the grain? (a) Knot (b) Shake (c) Warp (d) Stain
22. A material that softens when heated and hardens when cooled, and can be remoulded, is known as a ________. (a) thermosetting plastic (b) thermoplastic (c) ceramic (d) metal
23. The correct step in reading a technical drawing is often to first locate the ________ to understand the drawing’s context. (a) dimensions (b) title block (c) scale (d) symbols
24. Which of these is an alloy of copper and tin? (a) Brass (b) Bronze (c) Steel (d) Duralumin
25. All of these are examples of career prospects in technology EXCEPT ________. (a) Architect (b) Plumber (c) Lawyer (d) Welder
26. The term for the sticky, milky fluid extracted from rubber trees is ________. (a) sap (b) latex (c) resin (d) gum
27. A drawing that represents an object at a proportionally larger or smaller size than its actual dimensions is called a ________ drawing. (a) pictorial (b) orthographic (c) scale (d) sectional
28. Which is NOT a general property of glass? (a) Transparency (b) Brittleness (c) Good thermal conductivity (d) Chemical resistance
29. ________ is a career opportunity that involves designing and overseeing the construction of buildings. (a) Civil Engineering (b) Architecture (c) Mechanical Engineering (d) Electrical Engineering
30. The purpose of seasoning wood is mainly to prevent ________. (a) insect attack (b) decay (c) warping and cracking (d) fire hazards
31. Which of the following manufactured boards uses thin layers of wood veneer glued together with alternating grain directions? (a) Chipboard (b) Hardboard (c) Plywood (d) MDF
32. An example of a ferrous alloy is ________. (a) brass (b) bronze (c) steel (d) duralumin
33. The drawing method where an object’s front face is parallel to the projection plane, and receding lines are drawn at an angle (e.g., 45 degrees), is called ________ drawing. (a) Isometric (b) Orthographic (c) Oblique (d) Perspective
34. Which of these career fields would most likely require extensive knowledge of blueprints and technical drawings? (a) Agriculture (b) Medicine (c) Civil Engineering (d) Teaching
35. The process of extracting latex from a rubber tree is termed ________. (a) felling (b) tapping (c) curing (d) moulding
36. All of these are types of pictorial drawing EXCEPT ________. (a) Isometric (b) Oblique (c) Orthographic (d) Perspective
37. Which of these is NOT a primary raw material for making glass? (a) Sand (b) Soda ash (c) Limestone (d) Clay
38. The main reason for preserving wood is to protect it from ________. (a) hardening (b) shrinking (c) decay and insect attack (d) burning
39. Which of the following is a thermosetting plastic? (a) Polyethylene (b) PVC (c) Bakelite (d) Polystyrene
40. In isometric drawing, the three main axes are typically set at ________ degrees to each other. (a) 60 (b) 90 (c) 120 (d) 180

SECTION B: THEORY (30 Marks)
Instruction: Answer any THREE questions.

Question 1:
(a) Define ‘career’ and identify two factors influencing career choice. (2 marks)
(b) List three different stages involved in the processing of wood from a tree to usable timber. (3 marks)
(c) Explain why seasoning is a crucial step in wood processing. (3 marks)
(d) Name two common defects that can occur in timber. (2 marks)

Question 2:
(a) What is an alloy? Give one example of an alloy and its constituent metals. (2 marks)
(b) State three advantages of using alloys over pure metals. (3 marks)
(c) Describe the process of vulcanization and its importance in rubber technology. (3 marks)
(d) List two common uses of plastics in everyday life. (2 marks)

Question 3:
(a) Differentiate between isometric drawing and orthographic projection. (2 marks)
(b) Explain the purpose of using a ‘scale’ in technical drawing and give an example of a scale. (3 marks)
(c) Describe the key differences between First Angle Projection and Third Angle Projection. (3 marks)
(d) What is a blueprint? State one type of information typically found in the title block of a blueprint. (2 marks)

Question 4:
(a) Briefly explain how ceramics are produced. (2 marks)
(b) State three properties of glass that make it a widely used material. (3 marks)
(c) Describe the composition and manufacture of Plywood. (3 marks)
(d) Give two reasons why manufactured boards are preferred over solid timber for certain applications. (2 marks)

Objective Marking Scheme
Question 1 – ✅ (b) Career
Question 2 – ✅ (b) Seasoning
Question 3 – ✅ (c) Isometric
Question 4 – ✅ (b) improve properties
Question 5 – ✅ (d) Wormhole
Question 6 – ✅ (c) conversion
Question 7 – ✅ (c) Medicine
Question 8 – ✅ (c) Ceramic
Question 9 – ✅ (b) vulcanization
Question 10 – ✅ (c) zinc
Question 11 – ✅ (d) Orthographic
Question 12 – ✅ (b) Hardboard
Question 13 – ✅ (b) ductility
Question 14 – ✅ (a) vanishing
Question 15 – ✅ (c) Air seasoning
Question 16 – ✅ (c) carbon
Question 17 – ✅ (a) first
Question 18 – ✅ (c) Good electrical conductivity
Question 19 – ✅ (c) manufactured
Question 20 – ✅ (a) logging
Question 21 – ✅ (b) Shake
Question 22 – ✅ (b) thermoplastic
Question 23 – ✅ (b) title block
Question 24 – ✅ (b) Bronze
Question 25 – ✅ (c) Lawyer
Question 26 – ✅ (b) latex
Question 27 – ✅ (c) scale
Question 28 – ✅ (c) Good thermal conductivity
Question 29 – ✅ (b) Architecture
Question 30 – ✅ (c) warping and cracking
Question 31 – ✅ (c) Plywood
Question 32 – ✅ (c) steel
Question 33 – ✅ (c) Oblique
Question 34 – ✅ (c) Civil Engineering
Question 35 – ✅ (b) tapping
Question 36 – ✅ (c) Orthographic
Question 37 – ✅ (d) Clay
Question 38 – ✅ (c) decay and insect attack
Question 39 – ✅ (c) Bakelite
Question 40