Grade 10 building construction – Computer Aided Drawing Quiz
1. What does CAD stand for in building construction drawing?
CAD commonly stands for Computer Aided Drawing (or Design) and refers to using computers to create technical drawings for building construction.
2. Which file format is commonly used to exchange 2D drawing data between different CAD programs?
DWG is a standard drawing file format used by many CAD programs for 2D and 3D designs and is widely used for exchanging CAD data.
3. In CAD, what is a layer used for?
Layers separate drawing elements logically so you can control visibility, colour, and line type for walls, dimensions, furniture, and other items.
4. Which CAD tool lets you draw straight lines between two points?
The Line tool is the basic drawing command used to create straight segments between two specified points in CAD.
5. What does 'snap' (object snap) do in CAD drawing?
Object snap lets you precisely select key points (endpoints, midpoints, intersections) when drawing or editing, ensuring accuracy.
6. What is the purpose of setting a drawing scale in CAD for construction plans?
Drawing scale ensures measurements in the drawing correspond correctly to real-world sizes when printed or viewed.
7. Which CAD feature allows you to create and reuse a group of objects like a door or window?
Blocks are grouped objects saved as a single item so windows, doors, and furniture can be reused across the drawing.
8. What is a viewport in a CAD layout used for?
Viewports show parts of the drawing at specific scales on the layout (paper) space for printing sheets and plans.
9. Which CAD command changes the size of an object while keeping its proportions?
The Scale command increases or decreases the size of an object by a factor; keeping proportions if uniform scaling is used.
10. What is hatching used for in building drawings?
Hatching applies patterned fills to areas to show different materials or sections in construction drawings.
11. Which measurement unit is commonly used in Kenyan building drawings for small details?
Millimetres are commonly used for precise dimensions in detailed construction drawings in Kenya and internationally.
12. What does 'orthographic projection' show in CAD drawings?
Orthographic projection produces accurate, scale views (plan, elevation, section) used for construction documentation.
13. If you want to remove the part of a line that extends beyond an intersection, which CAD command do you use?
Trim removes segments of objects that extend past a defined cutting edge, cleaning up intersections in drawings.
14. What is the purpose of dimensioning in CAD drawings?
Dimensions communicate precise measurements (lengths, heights, angles) that builders use to construct elements on site.
15. Which CAD command creates a parallel copy of a line at a set distance?
Offset generates a copy of a line or curve at a specified distance, useful for walls, outlines, and parallel features.
16. What does the 'explode' command do to a block in CAD?
Explode disassembles a block into its component objects, allowing individual editing of the parts.
17. Which tool helps you move around the drawing smoothly without changing zoom level?
Pan shifts the view across the drawing area so you can navigate without altering the zoom scale.
18. Why are templates useful when starting a new CAD drawing for building plans?
Templates provide standard settings and layout elements so drawings follow office or national standards and are quicker to set up.
19. What does a CAD dimension style control?
Dimension styles set how dimensions are displayed, including text height, arrowheads, units and tolerances for consistency.
20. Which CAD command would you use to copy objects in a regular pattern across a floor plan?
Array creates multiple copies of selected objects in a linear or rectangular pattern, useful for repeated items like columns.
21. What is the function of the 'layer off' command in CAD?
Turning a layer off hides its objects from view without removing them, allowing focus on other parts of the drawing.
22. Which coordinate system is often used in CAD to give exact positions on the drawing?
Cartesian coordinates use X and Y (and Z for 3D) values to precisely locate points in the drawing space.
23. When preparing a CAD drawing for printing, what is the purpose of a plotter or printer configuration (plot style)?
Plot styles and printer settings determine how lines and colours translate to paper, affecting clarity and readability of plans.
24. What is 3D modelling in CAD used for in building construction?
3D modelling helps visualise designs, check how elements fit together (clash detection) and communicate designs to clients and builders.
25. What is the benefit of using standard line types (like dashed for hidden) in CAD building drawings?
Standard line types communicate meaning (hidden, centre, boundary) so everyone reading the drawing interprets features correctly.
26. Which CAD tool helps you measure distance or area directly from the drawing?
Measure or Dimension tools let you determine distances, angles, and areas on the drawing, aiding verification and quantity takeoffs.