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62 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What is the main purpose of a construction drawing |
To convey information about how something is to be built or installed |
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What must be taken into account when creating construction drawings |
Local building regulations, soil conditions, the availability of power and other services, road access, and may other factors |
Lay of the land, rules etc |
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5 Major Divisions of construction prints |
Architectural Structural Mechanical Plumbing Electrical
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Within each division is a series of working drawings that include a.... |
site plot plan, plan drawing, elevation drawing, sectional drawing And detail drawing
More- shop drawing, as built, |
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Blueprint |
An exact copy of a construction drawing |
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Pen plotter |
The device used to produce master drawings on a computer |
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Describe what an Engineers does |
Prepare drawings for the sub trades |
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The purpose of a Schematic diagram |
Is to show how a circuit operates. schematic diagrams show the electrical relationship between the various components of a circuit
Electricall relate ( to troubleshoot a circuit) |
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Three main type of pictorial drawing |
Obliques, isometrics, and perspectives |
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What do Estimators do |
Use prints to determine material and labour requirements when preparing a bid |
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5 Main types of working drawings |
Site/plot plans Plan Drawings Elevation drawings Sectional drawings Detail drawings Shop drawings As-built drawings |
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Describe a Site plan, and its purpose |
Top view of an entire property, shows the grade or slope, and elevation |
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Plan Drawing/ architectural floor plan shows |
A top view of the structure, concentrating on the inside of the building. Includes dimensions of structure, widths and lengths of walls, floor space, allocations and room numbers |
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Elevation drawings |
A front view of an object or structure, the view if you're standing directly in front of subject. Main use: to show how completed building will look from outside |
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Grid line |
Letter across the top, number along the side to identify any point of a drawing |
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Grid line |
Letter across the top, number along the side to identify and reference any point on a drawing |
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Bay line |
Ties into a specific feature of the actual structure for reference when doing layout work |
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Describe Object lines |
Thick and solid, show visible edges, corners and surfaces |
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Describe Object lines |
Thick and solid, show visible edges, corners and surfaces |
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Describe Hidden lines |
Thin evenly spaced dashes used to show edges and surfaces that are not visible in a view |
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Describe Object lines |
Thick and solid, show visible edges, corners and surfaces |
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Describe Hidden lines |
Thin evenly spaced dashes used to show edges and surfaces that are not visible in a view |
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Center lines |
Thin, alternating long and short dashes generally used to show the symmetry of an object/ to show the centre of a hole and or centre positions of rounded features such as arcs and radii |
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Describe Object lines |
(Thick and solid) show visible surfaces, edges and corners |
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Describe Hidden lines |
(Thin evenly spaced dashes) used to show edges and surfaces that are not visible in a view |
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Center lines |
(Thin, alternating long and short dashes) Generally used to show the symmetry of an object/ to show the centre of a hole and or centre positions of rounded features such as arcs and radii |
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Describe Dimension and extension lines |
(thin, solid lines) show direction, length, and limits Dimension lines are drawn with arrowheads at each end.
Extention lines are drawn close to the edges of the surface they limit, normally perpendicular or at right angles to the dimension lines |
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Leader lines |
Leader lines show information such as dimensional notes, material specifications and process notes Thin, solid lines with arrowhead at one end When referencing a surface a dog is used instead of an arrowhead |
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Describe Leader lines, and their purpose |
(Thin, solid line with arrowhead at ONE end) Leader lines point out information such as dimensional notes, material and specifications When pointing out a surface a dot is used instead of arrowhead |
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Describe Phantom lines |
Phantom lines show ALTERNATE POSITIONS for moving parts
(Thin, alternating long dashes, seperated by two short dashes) |
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Describe Cutting plane lines |
The location and path of imaginary cuts made through parts to show internal details (Thick with one long then two short dashes) |
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Describe Break lines |
Shows that a part has been shortened to reduce its size on the drawing. Long break line- (thin solid with zig zags) short break line-(thick wavy solid lines) |
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Describe isometric drawings |
Iso means equal measurement Baseline drawn at a 30 |
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Describe electrical elevation plans |
^ show locations of service conduit, meters, exterior lighting and any outdoor electrical devices or equipment that are seen in a vertical position |
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Electrical sectional drawing |
These sectional drawings are used to show hidden electrical such as Buried conduit and cable Ducts in a trench Stacking of conduit |
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Electrical detail drawings |
used commonly to show devices such as hangers mounting brackets and fasteners |
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What does scaling mean |
"Scaling the drawing"- to find a dimension by measuring directly from a drawing and multiplying by the ratio used in the drawing scale |
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Describe an orthographic projection |
Orthographic projection is a drawing that combines the top, front, left side, right side, back, and bottom views of an object on a single page |
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What is a power riser? |
A power riser shows how the electrical service is connected to a building in its vertical form for its specific arrangement on each floor. |
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Three main types of electrical diagrams |
1. Single line diagrams- (subdivided into Riser diagrams and Block diagrams) 2. Schematic diagrams, 3. Wiring diagrams |
One is subdivided into two so technically there is 5 |
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Describe Single line diagrams purpose |
Single line diagrams show distribution of electrical energy with a single line, the they only show supply line return path is not shown |
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Describe a Block diagrams purpose |
A Block diagram is a type of flow chart that shows the major components or devices in an electrical circuit, showing only the physical relationship in block form. Distinguishing features: Do not show return path Not used to show the actual position in the real circuit Components are labelled to show their name, type and sometimes catalogue number To show distribution systems Highest voltage or line side shown at top of drawing Lower voltage or load shown at bottom of drawinv
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Describe the purpose of a riser diagram |
Shows the relationship of components within a circuit and connections between. Shows the circuit as an elevation Front or side view Used to show electrical distribution theough a building |
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Describe the purpose of a riser diagram |
Shows the relationship of components within a circuit and connections between. Shows the circuit as an elevation Front or side view Used to show electrical distribution theough a building |
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Describe the purpose of schematic diagrams |
To show how a circuit operates They show the relationship between various componenets |
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Describe the purpose of a riser diagram |
Shows the relationship of components within a circuit and connections between. Shows the circuit as an elevation Front or side view Used to show electrical distribution theough a building |
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Describe the purpose of schematic diagrams |
They show the relationship between various components And show how a circuit operates |
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Describe Wiring diagrams, what it shows and its purpose. |
Used for initial wiring and troubleshooting. Wiring diagrams show exactly HOW and WHERE the wires are connected and how they run between devices. Often included to show how electrical panel boards are wired. |
Unlike other diagrams, this one shows the return path. |
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Three types of single line diagrams |
Block Riser Schematic |
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The sides usually shown in orthographic projection are |
Front top And right |
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A type of layout shown with a riser diagram |
Plumbing |
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A type of layout shown with a riser diagram |
Plumbing |
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Which type of drying is used to make a two point perspective |
Isometric |
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A type of layout shown with a riser diagram |
Plumbing |
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Which type of drawing is similar to a two point perspective drawing |
Isometric |
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Front (Term) |
Power panel |
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Two of the most important diagrams to electricians are the... and describe their purposes |
Schematic diagrams, and wirings diagrams. |
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8 basic rules for laying out a schematic diagram. |
1. Keep number of long lines to a minimum. 2. Avoid crossovers whenever possible. 3. Maintain a uniform size for component symbols 4. Align similar components when possible. 5. Show switches and relay contacts in the de energized state 6. Leave enough space for component identification and reference designation. 7. Space the lines and symbols so that the diagram appears balanced. 8. Simplify the connections by repositioning the component symbols. |
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Orthographic projection |
Separate but related two dimensional views of an object are shown on a single page to supply info needed to actually fabricate the object |
Imagine an object floating inside a glass box |
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What angle of degree are the dimension lines of an oblique drawing |
45 degrees |
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What angle of degree are the dimension lines of an Isometric drawing? |
30 degrees |
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Two perspective drawings |
One point similar to Oblique45 Two point similar to Isometric30 |
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