Grade 10 electricity – Pictorial Drawings Quiz
1. What is a pictorial drawing in electricity?
Pictorial drawings represent devices and wiring in a realistic way so learners and technicians can see how things look and where they go, rather than using abstract symbols.
2. Which is an advantage of pictorial drawings for Form 3/4 students learning basic wiring?
Pictorial drawings use realistic images of switches, bulbs and plugs, making it easier for beginners to recognise and place parts during practical work.
3. Where are pictorial drawings commonly used in everyday electrical work in Kenya?
Manufacturers and electricians often use pictorial diagrams to show how to fit an appliance or where sockets and switches should be placed in a house.
4. In a pictorial drawing of a simple torch (flashlight) circuit, which component represents the power source?
The battery (cell) is the power source; in pictorial drawings it is drawn to look like a real battery so learners can identify it easily.
5. How is a switch normally shown in a pictorial electrical drawing?
Pictorial drawings show the actual appearance of a switch so someone can see how it will be mounted and operated.
6. In pictorial drawings, how are wires shown?
Wires in pictorial diagrams are drawn as lines indicating the route between real-looking components so installers can follow the connections.
7. If two wires cross in a pictorial drawing but are not connected, how is this usually shown?
When wires cross but do not connect, pictorial and schematic conventions leave them simply crossing; a dot or clear join is used only where a connection exists.
8. When converting a pictorial drawing to a schematic diagram, what should you do first?
To make a schematic, you recognise the components shown realistically and redraw them using the standard electrical symbols and simplified connecting lines.
9. Pictorial drawings are best used in teaching to:
Pictorial diagrams are visual aids that show how parts look and fit together, making them useful for practical learning and assembly tasks.
10. Which colour is commonly used to represent the earth (ground) wire in modern pictorial domestic wiring diagrams?
The green/yellow combination is the standard colour for earth/ground conductors in modern wiring practice, making it easy to identify safety earthing in pictorial diagrams.
11. A pictorial drawing of a parallel circuit of three bulbs would show the bulbs:
Parallel circuits place each bulb on its own branch across the same two supply points so one bulb can fail without turning off the others; a pictorial shows these separate branches.
12. Why might an electrician prefer a pictorial drawing when installing a new light fitting in a Kenyan home?
For installation, knowing where fittings go and how they connect to existing wiring is more useful, and pictorial diagrams communicate this clearly.
13. What does a pictorial drawing NOT show clearly compared with a schematic diagram?
Pictorials focus on appearance and layout; schematics use symbols and neat layouts to make analysis of how currents and voltages flow easier.
14. Which statement is true about pictorial drawings?
Pictorial drawings represent devices as they look to help visual recognition; calculations and detailed circuit analysis normally use symbolic schematics.
15. If a pictorial drawing shows a plug inserted into a socket and a lamp connected, what is the drawing most likely illustrating?
Depicting a plug, socket and lamp together typically illustrates how an appliance or lamp is connected in a home supply circuit.
16. How are fuses normally shown in pictorial wiring diagrams?
Pictorials show the actual appearance of protective devices like fuses and holders so electricians can identify and replace them correctly.
17. What is the first step when drawing a pictorial diagram for a classroom circuit activity?
Pictorial drawings are based on the real appearance and placement of parts, so assembling or observing components first helps make an accurate picture.
18. Which of the following statements about pictorial drawings is false?
This statement is false: pictorials are not designed for calculations or detailed analysis; schematics with symbols are used for that purpose.
19. How are cells and batteries usually drawn in a pictorial electrical diagram?
Pictorials show the real appearance of cells or battery packs, often marking the + and − ends so users can place them correctly.
20. When showing the route of a cable in a house on a pictorial drawing you should:
Pictorial wiring plans help installers see where to run cables and place fittings; they do not normally give electrical measurements or calculations.
21. In a pictorial drawing, the bulb filament is usually shown as:
Pictorial drawings show the actual look of a bulb (often including the glass shape and filament) to help identification during assembly or repair.
22. A common limitation of pictorial diagrams when circuits get complex is that:
For complex circuits, pictorials can be confusing; schematics with standard symbols and tidy layouts are better for analysis and troubleshooting.
23. When teaching a class about household wiring, a teacher uses pictorial drawings to:
Pictorial diagrams make it easier for students to recognise practical items and understand where they should be fixed during real installations.
24. To check if two components are connected in a pictorial diagram, you should look for:
Connections are shown by lines (wires) between components; physical proximity or colour in a picture does not guarantee an electrical connection.
25. Which drawing type is best to show how parts of an electrical box fit together in three dimensions?
Pictorial isometric or perspective drawings show three-dimensional arrangement so installers can see how parts fit together in space.