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Questions and Answers

What primary skill is required to effectively use national road maps?

  • Identifying the nutritional content of roadside restaurant meals.
  • Memorizing the license plate numbers of passing vehicles.
  • Deciding on the most appropriate route between destinations. (correct)
  • Calculating the torque of a vehicle's engine.

What type of map is most useful for determining accurate traveling distances on specific sections of a route?

  • National road map.
  • Political map.
  • Strip chart. (correct)
  • Thematic map.

Which type of map would be most helpful in locating a specific business within a city?

  • Street map. (correct)
  • Weather map.
  • Geological survey map.
  • Topographical map.

In a housing complex map, what is the primary skill required?

<p>Following directions to a specific location within the complex. (B)</p> Signup and view all the answers

If a map measurement is 5 cm and the scale factor is 1:20,000, calculate the actual distance.

<p>1 kilometer. (B)</p> Signup and view all the answers

An actual distance between two landmarks is 4 kilometers. Using a map with a scale of 1:50,000, what would be the corresponding map measurement?

<p>8 cm. (D)</p> Signup and view all the answers

What does a number scale of 1:75,000 on a map indicate?

<p>The plan is 75,000 times smaller than the actual size. (A)</p> Signup and view all the answers

Why does a bar scale remain accurate even when a map is resized, unlike a number scale?

<p>The bar scale adjusts proportionately with the map's size, maintaining the relationship between measured length and actual distance. (D)</p> Signup and view all the answers

What type of plan provides a 2-dimensional view of a building as seen from the side?

<p>Elevation plan. (D)</p> Signup and view all the answers

Which type of plan is most useful for understanding the layout and dimensions of the inside of a building?

<p>Floor plan. (B)</p> Signup and view all the answers

What is the main purpose of a design drawing?

<p>To display the design, layout, and components of an item to be constructed or manufactured. (D)</p> Signup and view all the answers

When reviewing building plans, what skill involves understanding terms like North, South, East, and West Elevation?

<p>Understanding compass directions to interpret different sides of the house. (B)</p> Signup and view all the answers

If the actual height of a window is 1.5 meters and the plan scale is 1:50, what will the measurement of the window be on the plan?

<p>3 cm. (A)</p> Signup and view all the answers

What is the formula to calculate the plan measure from an actual dimension, given a specific scale factor?

<p>$ ext{Plan Measure} = rac{ ext{Actual Dimension}}{ ext{Scale Factor}}$ (A)</p> Signup and view all the answers

In the context of design drawings, what does a 'cutting list' typically specify?

<p>A list of parts needed and how to cut them from a larger piece of material. (D)</p> Signup and view all the answers

What is the initial step in assembling components?

<p>Interpreting instructions. (D)</p> Signup and view all the answers

Why is it important to accurately measure materials before cutting them during an assembly process?

<p>To ensure the materials fit together correctly, avoiding errors in assembly. (D)</p> Signup and view all the answers

What is the purpose of regularly checking assembled parts against the instructions or plans?

<p>To make adjustments as needed to correct mistakes and ensure accuracy. (C)</p> Signup and view all the answers

In the context of assembling, what is the significance of following steps in the correct sequence?

<p>It ensures that components fit together properly and the assembly is structurally sound. (D)</p> Signup and view all the answers

Which skill involves visualizing a 3D object and representing it as a 2D net?

<p>Drawing 2D plans/nets of 3D models. (C)</p> Signup and view all the answers

What is the main purpose of using models in the context of 2D and 3D representations?

<p>To facilitate the movement and understanding between 2D and 3D representations of objects. (C)</p> Signup and view all the answers

How does understanding 2D plans/nets assist in building 3D models?

<p>It provides a flat layout with folding lines to form the 3D object. (C)</p> Signup and view all the answers

What initial step is crucial when drawing a 2D plan/net of a 3D model?

<p>Observing the 3D model to understand its faces and edges. (B)</p> Signup and view all the answers

Which of the following is a critical consideration when estimating traveling costs using a national road map?

<p>The estimated fuel consumption and toll fees associated with the chosen route. (C)</p> Signup and view all the answers

A map has a scale of 1:25,000. On the map, a park measures 12cm long. What is the actual length of the park in kilometers?

<p>3 km (D)</p> Signup and view all the answers

You need to create a scale drawing of a rectangular garden that is 15 meters long and 10 meters wide on a piece of paper that is 30 cm long and 20 cm wide. What scale is most appropriate to fit the entire garden on the paper?

<p>1:50 (B)</p> Signup and view all the answers

When estimating the time required for an assembly project, which factor is LEAST likely to influence the accuracy of the estimation?

<p>The philosophical implications of the assembly's final purpose. (C)</p> Signup and view all the answers

A design drawing of a birdhouse includes a cutting list. The list specifies that the base of the birdhouse needs to be cut from a plank that is 1 meter long. If the design requires the base to be a square with sides of 20 cm, how many identical bases can be ideally cut from the plank, assuming minimal waste?

<p>5 (D)</p> Signup and view all the answers

Given a floor plan with a scale of 1:75, a rectangular room measures 6 cm by 8 cm on the plan. You want to install a carpet that costs $25 per square meter. What is the estimated cost of the carpet needed for the room?

<p>$900 (C)</p> Signup and view all the answers

You are using a street map with a grid reference system to locate a specific building. The street index indicates that the building is located at grid reference 'C7'. However, you notice that the map is misprinted, and the C column is missing. All other columns and rows are correctly labeled. How would you logically adjust your approach to locate the building?

<p>Estimate the position of the missing 'C' column based on the spacing of the adjacent columns and search in that area. (D)</p> Signup and view all the answers

Consider a scenario where you are tasked with creating a highly accurate scale model of a historical building using only hand tools and readily available materials. The building's original blueprints are written in a language you do not understand, and the only available reference is a single, low-resolution photograph taken from an oblique angle. What combination of techniques would be most effective in maximizing the accuracy of your model?

<p>Attempt to teach yourself the language the blueprints are written in, use photogrammetry techniques to extract measurements from the photo, and cross-reference your findings with historical records. (B)</p> Signup and view all the answers

What is the primary use of a strip chart?

<p>To determine distances and points of interest along a specific route. (B)</p> Signup and view all the answers

Which skill is particularly important when using street maps?

<p>Following directions using street names and directional indicators. (A)</p> Signup and view all the answers

If a map has a scale of 1:100,000 and the measurement between two points on the map is 8 cm, what is the actual distance between these points?

<p>8 km (A)</p> Signup and view all the answers

An actual distance is 15 kilometers. If the map scale is 1:30,000, what would the corresponding measurement be on the map?

<p>5 cm (B)</p> Signup and view all the answers

What does a number scale on a map represent?

<p>The ratio between the map distance and the corresponding actual distance. (C)</p> Signup and view all the answers

Why is a bar scale more reliable than a number scale when a map is resized?

<p>The bar scale adjusts proportionally with the map size, maintaining accuracy. (A)</p> Signup and view all the answers

What is the main purpose of an elevation plan in building plans?

<p>To illustrate the building's exterior design and dimensions from a side view. (D)</p> Signup and view all the answers

Which type of plan is most useful for determining the arrangement of rooms in a building?

<p>Floor plan (C)</p> Signup and view all the answers

You have a design drawing for a table. Which aspect would the drawing primarily help you understand?

<p>The aesthetic appearance and component dimensions of the table. (C)</p> Signup and view all the answers

When examining building plans, what does understanding compass directions facilitate?

<p>Understanding the orientation of different sides of the building as shown in elevation plans. (D)</p> Signup and view all the answers

If a window's actual width is 1.8 meters and the plan's scale is 1:60, what is the width of the window on the plan?

<p>3 cm (A)</p> Signup and view all the answers

What is the correct formula for calculating plan measurement from an actual dimension using a given scale factor?

<p>$\text{Plan Measure} = \frac{\text{Actual Dimension}}{\text{Scale Factor}}$ (A)</p> Signup and view all the answers

In a design drawing, what is the purpose of a 'cutting list'?

<p>To indicate how to optimally cut parts from raw materials. (A)</p> Signup and view all the answers

Before starting the physical assembly of components, what should you do?

<p>Carefully review the assembly instructions and identify all parts. (A)</p> Signup and view all the answers

Why is precise measurement of materials important before cutting them?

<p>To avoid wasting materials and ensure correct fit during assembly. (D)</p> Signup and view all the answers

During assembly, why should you regularly compare the assembled parts to the plans?

<p>To identify errors early and ensure accuracy. (D)</p> Signup and view all the answers

What is the most critical reason for following the specified sequence of steps during assembly?

<p>To ensure components fit together as intended and maintain structural integrity. (B)</p> Signup and view all the answers

When working with 2D and 3D representations, what does the ability to visualize a 3D object as a 2D net enable?

<p>The ability to design packaging and create models from flat materials. (D)</p> Signup and view all the answers

Why are models useful in the context of 2D and 3D representations?

<p>To visualize and manipulate objects more effectively than with drawings alone. (D)</p> Signup and view all the answers

How does understanding 2D plans/nets specifically help in building 3D models?

<p>It provides a blueprint for cutting, folding, and assembling the model. (A)</p> Signup and view all the answers

In preparation of creating a 2D plan/net for a 3D model, what is the most important initial step?

<p>Accurately measuring and understanding the dimensions and shapes of the 3D model. (A)</p> Signup and view all the answers

Which option is LEAST crucial when estimating total costs before traveling using a national road map?

<p>Projected weather conditions during the trip. (D)</p> Signup and view all the answers

A map is scaled at 1:40,000. A river measures 16 cm on the map. What is the actual length of the river?

<p>6.4 km (C)</p> Signup and view all the answers

You need to sketch a rectangular garden on paper. The garden is 18 meters long and 12 meters wide, and your paper is 30 cm by 20 cm. What scale fits the garden on the paper appropriately?

<p>1:100 (A)</p> Signup and view all the answers

When estimating the duration of an assembly project, which factor would LEAST likely affect the accuracy of your estimation?

<p>The weather outside. (D)</p> Signup and view all the answers

A design drawing requires a shelf that is 30 cm long. You have a plank that is 1.5 meters long. Assuming no material is lost in cutting, how many such shelves can be ideally cut from the plank?

<p>5 (A)</p> Signup and view all the answers

Given a floor plan with a scale of 1:50, a square room measures 7 cm by 7 cm on the plan. You want to purchase a carpet that costs $30 per square meter. What is the approximate cost of the carpet needed for the room?

<p>$735 (B)</p> Signup and view all the answers

You are using a street map with a grid reference system to locate a specific building. The street index indicates the building is in grid 'D5,' but the '5' row is missing. All other rows and columns are labeled. How do you locate the building?

<p>Search along column 'D', relying on landmarks and building numbers. (B)</p> Signup and view all the answers

Consider creating an accurate scale model of a building using only hand tools, basic materials, and a blurry photo from a weird angle as reference. The original blueprints are in a language you cannot read. What approach would MAXIMIZE accuracy?

<p>Focus on recreating easily identifiable features from the photo, use standard architectural ratios, and cross-validate dimensions with online sources related to similar buildings. (C)</p> Signup and view all the answers

The scale factor in the number scale on a map indicates:

<p>The <strong>ratio</strong> of the size of the area of land as drawn on the map and the actual size of that area of land. (B)</p> Signup and view all the answers

Which of the following options explain when a bar scale would not be inaccurate if the size of the map is changed?

<p>The bar scale is also re-sized by the same proportion and so the relation between measured length and actual seize also changes proportionally (A)</p> Signup and view all the answers

After carefully reading and interpreting the instructions or plans for assembly, what would be the next step?

<p>Gathering all the materials or tools required for the assembly. (A)</p> Signup and view all the answers

Assembling requires some key skills, which of these skills is not considered a key skill?

<p>Ensure the assembled project will be profitable or else disassemble to save wasted efforts. (A)</p> Signup and view all the answers

These following steps are steps to assemble components, however, one of the steps is not required.

<p>Documenting assembly process for future reference. (B)</p> Signup and view all the answers

Which type of map is specifically designed to show major routes and distances between cities and towns within a country?

<p>National Road Map (D)</p> Signup and view all the answers

For planning a road trip across South Africa, which map type is most suitable for initially identifying the best route between Johannesburg and Cape Town?

<p>National Road Map of South Africa (B)</p> Signup and view all the answers

If you need to find the most direct route and calculate a more precise travel distance along a specific highway section, which type of map would be the most effective?

<p>Strip Chart (D)</p> Signup and view all the answers

To locate a particular shop within a shopping mall, which type of map would be the most appropriate?

<p>Street Map (A)</p> Signup and view all the answers

What is the primary purpose of a housing complex map?

<p>To indicate house locations within a small residential area. (D)</p> Signup and view all the answers

On a map with a scale of 1:25,000, a road measures 8 cm. What is the actual length of this road?

<p>2 kilometers (B)</p> Signup and view all the answers

If the actual distance between two points is 7.5 kilometers, what would be the corresponding measurement on a map with a scale of 1:50,000?

<p>15 cm (B)</p> Signup and view all the answers

A map scale of 1:100,000 indicates that:

<p>1 cm on the map represents 100,000 cm in reality. (A)</p> Signup and view all the answers

Why is a bar scale advantageous compared to a number scale when a map is photocopied to a different size?

<p>Bar scales maintain proportional accuracy because they are graphical. (B)</p> Signup and view all the answers

In building plans, what does a floor plan primarily illustrate?

<p>A bird's-eye view of the building's layout without the roof. (C)</p> Signup and view all the answers

To understand the external facade of a building, including the roof design and window placements, which type of building plan is most useful?

<p>Elevation Plan (C)</p> Signup and view all the answers

What is the main purpose of a design drawing in a technical context?

<p>To communicate the specifications and components of an object to be constructed. (A)</p> Signup and view all the answers

When examining building plans, understanding 'North Elevation' is crucial for knowing:

<p>The appearance of the building's north-facing side. (C)</p> Signup and view all the answers

If a door's actual width is 900 mm and the plan scale is 1:50, what will be the width of the door on the plan?

<p>18 mm (D)</p> Signup and view all the answers

Which formula is used to calculate the plan measurement when you know the actual dimension and the scale factor?

<p>Plan Measure = Actual Dimension / Scale Factor (C)</p> Signup and view all the answers

In a design drawing, what does a 'cutting list' primarily specify?

<p>The dimensions and types of materials needed for each component. (C)</p> Signup and view all the answers

What is generally the first step after carefully reviewing the assembly instructions?

<p>Gathering all necessary materials and tools. (D)</p> Signup and view all the answers

Why is accurate measurement of materials crucial before cutting them during an assembly project?

<p>To ensure components fit together correctly and minimize waste. (D)</p> Signup and view all the answers

During assembly, why should you regularly check assembled parts against the instructions or plans?

<p>To verify accuracy and correct any deviations early in the process. (A)</p> Signup and view all the answers

What is the primary reason for strictly following the specified sequence of steps in an assembly process?

<p>To ensure structural integrity and proper functioning of the final product. (B)</p> Signup and view all the answers

Visualizing a 3D object as a 2D net is a skill primarily used for:

<p>Creating patterns for constructing 3D shapes from flat materials. (B)</p> Signup and view all the answers

What is the primary educational benefit of using models in the context of 2D and 3D representations?

<p>To aid in understanding spatial relationships and the transition between 2D and 3D forms. (D)</p> Signup and view all the answers

How does understanding 2D plans or nets directly assist in the process of building 3D models?

<p>It provides a template for cutting and folding flat materials into a 3D shape. (B)</p> Signup and view all the answers

When starting to draw a 2D plan or net of a 3D model, what is the most important initial step?

<p>Visualizing how the 3D model unfolds into a flat shape. (C)</p> Signup and view all the answers

Which of the following is LEAST relevant when estimating travel costs using a national road map?

<p>The color of the roads on the map. (B)</p> Signup and view all the answers

A map has a scale of 1:30,000. A park is represented as 15 cm long on the map. What is the actual length of the park in kilometers?

<p>4.5 km (D)</p> Signup and view all the answers

You need to create a scale drawing of a rectangular garden that measures 20 meters long and 15 meters wide on a paper that is 40 cm long and 30 cm wide. What is the largest possible scale that allows the entire garden to fit on the paper?

<p>1:50 (A)</p> Signup and view all the answers

When estimating the time needed for an assembly project, which factor is MOST likely to cause inaccuracies in your initial estimation?

<p>Unexpected delays or complications during assembly. (B)</p> Signup and view all the answers

A design drawing specifies a wooden beam of 1.8 meters length. You have a plank of 3 meters length. If you need to cut beams of 1.8 meters, how many such beams can you ideally cut from one 3-meter plank, assuming no kerf loss?

<p>1 (D)</p> Signup and view all the answers

A floor plan has a scale of 1:100. A square room measures 9 cm by 9 cm on the plan. If carpeting costs $40 per square meter, what is the estimated cost to carpet this room?

<p>$3,240 (A)</p> Signup and view all the answers

You are using a street map with a grid reference system to locate a building. The index says 'E4', but column 'E' is misprinted and illegible. Rows and other columns are fine. How best to proceed?

<p>Assume 'E' is next to 'D' and check column next to 'D'. (C)</p> Signup and view all the answers

You must create a highly accurate scale model of a complex historical building using only basic hand tools, paper, glue, and a single, blurry photo from an odd angle. Blueprints are in an unknown language. What approach best maximizes model accuracy?

<p>Use photo for proportions, estimate dimensions relative to known parts (doors, windows), iterate-refine model based on photo and general architectural knowledge. (D)</p> Signup and view all the answers

The scale factor in a number scale on a map directly represents:

<p>The ratio by which the real-world distances are reduced on the map. (C)</p> Signup and view all the answers

Under what circumstance would a bar scale maintain its accuracy even if the map's dimensions are altered (e.g., through photocopying or digital resizing)?

<p>If the map and the bar scale are resized proportionally together. (A)</p> Signup and view all the answers

After thoroughly reading and understanding the instructions for assembling a bookshelf, what would be the MOST logical next step to take?

<p>Begin by sorting all components and verifying against a parts list. (A)</p> Signup and view all the answers

Which of the following skills is LEAST directly related to successfully assembling components according to instructions?

<p>Advanced mathematical calculation skills. (D)</p> Signup and view all the answers

Which type of map is most useful for planning a long road trip and identifying potential overnight stops?

<p>National road map (C)</p> Signup and view all the answers

What is the primary purpose of distance markers on a strip chart?

<p>To help determine traveling distances on specific sections of a route (A)</p> Signup and view all the answers

What is the function of the grid reference system used with street maps?

<p>To find specific streets using the street index (D)</p> Signup and view all the answers

What is the primary skill required to effectively use maps of housing complexes?

<p>Following directions to locations within the complex (D)</p> Signup and view all the answers

On a map with a scale of 1:100,000, if the distance between two towns measures 3 cm, what is the actual distance between the towns?

<p>3 km (D)</p> Signup and view all the answers

The actual distance between two points is 6 kilometers. On a map with a scale of 1:30,000, what would the corresponding distance be?

<p>20 cm (D)</p> Signup and view all the answers

What information does a number scale on a map provide?

<p>The relationship between the map size and the actual area size (B)</p> Signup and view all the answers

What is the purpose of an elevation plan in architectural drawings?

<p>To illustrate the design and dimensions of the outside of a structure (C)</p> Signup and view all the answers

What is the primary purpose of a floor plan?

<p>To show a view of the design and dimensions of the inside of a building or structure (D)</p> Signup and view all the answers

If the scale of a plan is 1:20 and a line on the plan is 5 cm long, what is the actual length of the feature it represents?

<p>100 cm (C)</p> Signup and view all the answers

If a door is actually 2 meters tall, what would its height be on a plan with a scale of 1:50?

<p>4 cm (D)</p> Signup and view all the answers

During assembly, why should you regularly compare the assembled parts to the plans or instructions?

<p>To ensure accuracy and to make adjustments as needed (D)</p> Signup and view all the answers

Why is it important to follow the specified sequence of steps during the assembly process?

<p>To guarantee that components fit together correctly and prevent errors (A)</p> Signup and view all the answers

What is the value of visualizing a 3D object as a 2D net?

<p>It helps in understanding how to construct the object from a flat layout (C)</p> Signup and view all the answers

When beginning to draw a 2D plan or net of a 3D model, what is the most critical initial step?

<p>Understanding the faces and edges of the 3D model (A)</p> Signup and view all the answers

What is the primary thing to do before physically assembling components?

<p>Carefully reviewing the assembly instructions or plans (A)</p> Signup and view all the answers

If you are using a national road map, for what would you be least likely to use it?

<p>Identifying the location of a shop in a small town (B)</p> Signup and view all the answers

What does understanding compass directions primarily facilitate when examining building plans?

<p>Knowing the position of sides of the house shown on different elevations (A)</p> Signup and view all the answers

A map has a scale where 1 cm on the map equals 75,000 cm in reality. If a river measures 6 cm on the map, what is its actual length?

<p>4.5 km (C)</p> Signup and view all the answers

You need to draft a garden plan on paper. The garden is 10 meters wide and 25 meters long, and your paper is 30 cm by 40 cm. What is the most suitable scale to fit the entire garden on the paper?

<p>1:100 (B)</p> Signup and view all the answers

When assembling something, which of the following factors would LEAST influence how long it takes you?

<p>Whether or not you like the colour of the box it came in (A)</p> Signup and view all the answers

Suppose you need to cut shelves that are each 40 cm long from a plank that is 2 meters long. How many shelves can you ideally cut from the plank if you assume zero material waste?

<p>5 (C)</p> Signup and view all the answers

Given a floor plan with a scale of 1:200, a lounge measures 4 cm by 5 cm on the plan. If the carpet costs $50 per square meter, what is the estimated cost to carpet the lounge?

<p>$2000 (A)</p> Signup and view all the answers

Imagine you are using a street map with a grid, but column 'B' is missing due to a printing error. The index says the location you're hunting is located in B2. How should you modify your approach to locate the building?

<p>Use cross-referencing with nearby streets or landmarks in adjacent, correctly labeled columns and rows to estimate the location. (C)</p> Signup and view all the answers

Consider that you are tasked with making a scaled model of a famous building, and the blueprints are in an alien language. What technique will MAXIMIZE the accuracy of the scale model? You can take measurements from real-world objects.

<p>Cross-referencing with measured real-world objects (B)</p> Signup and view all the answers

What is the correct formula to determine the actual distance, given a map measurement?

<p>$\text{Actual distance} = \text{Map measurement} \times \text{Scale factor}$ (A)</p> Signup and view all the answers

Which conversion is correct for 7.5 kilometers, depicted on a 1:50,000 scale map?

<p>Plan Measurement = Actual Distance divided by Scale Factor (C)</p> Signup and view all the answers

Which is NOT true about number scales?

<p>The scale never needs to be changed after the map has been photocopied. (B)</p> Signup and view all the answers

Which is a quality of bar scales compared to number scales?

<p>The numbers on the bar show the relationship between measured length and the actual distance. (C)</p> Signup and view all the answers

What does an Elevation Plan show?

<p>Shows the design and dimensions of the outside of a building or structure. (C)</p> Signup and view all the answers

What should you do to ensure measurement are precise to avoid errors in assembly?

<p>Measure all materials accurately using appropriate tools. (B)</p> Signup and view all the answers

The following steps are required for the assembly. Which of the following options include all steps?

<p>All of the above. (D)</p> Signup and view all the answers

You're assembling a complex structure with various interlocking components. After several attempts, you realize that a critical piece was installed backwards in Step 3, which is now preventing the correct installation of all subsequent parts. The instructions explicitly state the parts interlock in only one orientation. What is BEST course of action?

<p>Disassemble components back to the point of error and adjust. (A)</p> Signup and view all the answers

Flashcards

National Road Maps

Major routes, roads, and distances between major cities and towns in South Africa.

Strip Charts

Locations of towns, roads, and points of interest on a specific route.

Street Maps

Positions and names of streets and locations within a city.

Housing Complex Maps

Positions of houses within a small complex.

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Map to Actual Distance

Measure a distance on a map and use the given scale to find the actual distance.

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Actual Distance Formula

Formula to convert map measurement to actual distance.

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Actual Distance to Map

Use a known actual distance and the given scale to find the length on the map.

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Map Measurement Formula

Formula to convert the actual distance to the map measurement.

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Number Scale

Expressed as 1:50,000, represents the ratio between the map and the actual area.

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Bar Scale

Shows the direct relationship between measured length and actual distance on the map.

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Floor Plan

Shows a building from above without the roof.

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Elevation Plan

Shows a building from the side.

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Design Drawing

Shows the design and dimensions of an item.

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Scale to Determine Dimensions

Use a given scale to find the dimensions of features on the plan.

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Plan Measure Calculation

Reduce the actual measurement proportionately using the given scale. The formula is: $Plan Measure = \frac{Actual Dimension}{Scale Factor}$

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2D Net

A flat layout that can be folded into a 3D object.

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Build 3D Models

Creating a 3D object from a 2D drawing.

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Draw 2D Plans/Nets

Representing a 3D object as a 2D net.

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Interpret Instructions

Read the assembly instructions to identify parts and diagrams.

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Prepare Materials and Tools

Gather all required materials and tools for assembly.

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Measure Accurately

Ensure parts fit together correctly by using measurement tools.

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Cut Materials as Needed

Use tools to cut to the required dimensions.

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Estimate Quantities and Costs

Calculate material quantities to determine costs.

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Estimate Time

Find the overall build time.

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Follow the Sequence

Complete each stage accurately.

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Check and Adjust

Make adjustments to correct mistakes.

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National Road Map Skills

Deciding on the best path and calculating travel expenses.

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Strip Chart Skills

Calculating more exact travel distances on certain route portions.

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Street Map Skills

Finding spots using signs and giving directions using street names.

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Housing Complex Map Skills

Working on maps of small areas.

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Map Distance Conversion

Calculate the real-world distance represented by a measurement on a map.

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Actual Distance Conversion

Convert actual distance to its representative length on a map.

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Number Scale Meaning

The map is reduced by a certain factor.

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Bar Scale Use

How measured length corresponds to actual distance

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Floor Plan: Purpose

To determine dimensions, layout and inside of a structure.

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Elevation Plan: Purpose

To determine dimensions, layout and outside of a structure.

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Design Drawing: Purpose

To see how the item will look once built.

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Match Features Between Plans

Connect aspects on different schematics.

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Understand Compass Directions

Use terms like North, South, East, and West Elevation.

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Visualize Unfolding

Observe an object and see how it can be flattened.

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Complete the Assembly

Continue assembling all components until complete.

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Identifying Locations

Identify locations using symbols on a map.

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Street Index Use

Use the grid reference system with the street index to locate streets.

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Estimate Map Distances

Estimate distances accurately using the scale provided on the map.

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Number Scale Explanation

Shows the relationship between the size on the map and the real size of the area.

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Number Scale Conversion

Enlarge or reduce measurements by the given scale factor.

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Number Scale Validity

If the map is resized, the number scale is no longer valid, and a new scale must be determined.

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Bar Scale Accuracy

Shows the direct correspondence between measured length and actual distance, remaining accurate even if the map size changes.

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Building Feature ID

Identify elements on the plan like rooms, windows and doors.

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Compass Direction terms on plans

Terms used on construction schematics.

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3D Model Construction

Creating 3D forms from 2D layouts.

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2D Net Creation

Visualizing an object and representing it as a net.

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Assembly Instructions

Carefully read plans or instructions.

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National Road Map Use

Decide the route and estimate costs and times.

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Housing positions

Positions of houses on a housing complex map

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Map Measurement Definition

Actual distance from map measurement

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Bar Scale Definition

Measured units compared to actual units

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Floor Plan View

Shows inside layout without roof

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Elevation Plan View

Shows outside layout from the side

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Design Drawing Object

Item with components and layout

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Plan Measure Process

Reduce actual dimension to drawing size

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2D Net Definition

Arrangement to form a 3D shape

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Building a 3D Model

Process to derive from 2D to 3D

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Assembly stages

Follow sequential stages

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Distance Table Use

Find travel distance

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Street Directions

Following street names to your destination

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Bar Scale Units

How much each drawn unit equals

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Drawing face

Know front, back, side of buildings

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Assembly Materials View

See material lists for tasks

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Assembly Quality Check

Make sure parts are right

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Instructions First

Carefully read instructions

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Assembly Size Dimensions

Check dimensions of components

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Plan Measure Conversion

The scale to reduce an actual height

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Successful Build

Assembly complete

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Cutting part

List possible cutting methods

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Study Notes

  • Scales are essential for estimating distances on maps when distance tables or markers are unavailable.
  • It's usually possible to estimate distances with a scale, but not determine them accurately due to factors like precise measurement and specific destinations.

National Road Maps

  • Show major routes, roads, and distances between major cities and towns in South Africa.
  • Skills include deciding on routes, estimating costs and times, planning stops, and using distance tables.

Strip Charts

  • Display locations of towns, roads, and points of interest on a specific route.
  • Skills involve determining accurate distances, choosing stops for fuel or breaks, and estimating costs and times.

Street Maps

  • Show positions and names of streets and locations within a city.
  • Skills: identifying locations using symbols, following and giving directions, and using a grid reference system.

Housing Complex Maps

  • Display positions of houses within a small complex.
  • Skills involve working with maps of small areas and following directions to specific locations.

Calculation Type 1: Map Measurement to Actual Distance

  • Measure a distance on the map, then use the scale to convert it to the actual distance.
  • Formula: $\text{Actual distance} = \text{Map measurement} \times \text{Scale factor}$

Calculation Type 2: Actual Distance to Map Measurement

  • Start with the actual distance, then use the scale to convert it to the map measurement.
  • Formula: $\text{Map measurement} = \frac{\text{Actual distance}}{\text{Scale factor}}$

Number Scale

  • Expressed as a ratio (e.g., 1:50,000) showing the relationship between the map and the actual area size.
  • Conversion involves enlarging or reducing by the scale factor directly.
  • A scale of 1:50,000 means the plan is 50,000 times smaller than the actual size.

Bar Scale

  • Shows the relationship between measured length and actual distance on the map itself.
  • Measuring on the bar scale indicates how many measured units equal actual distance.
  • It remains accurate even if the map size changes because it resizes proportionally.

Floor Plan

  • A 2D view of a building from above, without the roof, showing internal dimensions and layout including lengths and widths of the building, windows and doors.

Elevation Plan

  • A 2D view of a building from the side, showing external dimensions and layout of the roof, walls, windows, and doors.

Design Drawing

  • Shows the design, layout, and components of an item to be constructed or manufactured, it illustrates the different component parts, dimensions of these parts, and specific instructions on how they should look.
  • Skills involve describing features, matching features between plans, understanding compass directions (North, South, East, West Elevation), and using scale to determine dimensions.

Plan Measure Calculation

  • When converting from an actual dimension to a plan measure, reduce the actual measurement using the scale.
  • Formula: $\text{Plan Measure} = \frac{\text{Actual Dimension}}{\text{Scale Factor}}$
  • For example, if the actual height of a door is $2.1 \text{ m}$ and the scale is $1:75$: $\text{Plan Measure} = \frac{2.1 \text{ m}}{75} = 0.028 \text{ m} = 2.8 \text{ cm} = 28 \text{ mm}$

3D Models

  • Grade 11 learners need to build 3D models from 2D plans and draw 2D plans/nets of 3D models.
  • Use models to investigate packaging, perimeter, area, and volume problems.

Purpose of 2D to 3D shifting

  • Facilitate the movement between 2D and 3D representations of objects.
  • Involves moving from a 2D drawing to a 3D object and vice versa.

Process

  • Understand 2D plans/nets which are flat layouts that form 3D objects when folded.
  • Cut out the 2D net and fold along indicated lines.
  • Assemble the folds to create the 3D model.
  • Observe the 3D model and visualize how it unfolds into a flat layout to draw the net.

Assembling

  • Carefully read and interpret instructions, identifying parts and components.
  • Ensure all materials and tools are available in the correct size, quantity, and type.
  • Measure accurately and cut materials as needed, estimating quantities, costs, and time.
  • Follow steps in sequence, checking and adjusting as necessary, using mathematical tools and techniques.

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