Unit 2- Technical Sketching And Drawing Outline

Question 1

Concepts

Answer 1

Two and three dimensional objects share visual relationships which allow interpretation of one perspective from the other.

Question 2

Concepts

Answer 2

Geometric shapes and forms are described and differentiated by their characteristics features.

Question 3

Concepts

Answer 3

The style of the engineering graphics and the type of drawing view used to detail and object vary depending upon the intended use of the graphic.

Question 4

Concepts

Answer 4

Technical drawings convey information according to an established practices which allow for detailed and universal interpretation of the drawing.

Question 5

Concept

Answer 5

Hand sketching of multiple representation to fully and accurately detail simple objects or parts of objects is a technique used to convey visual and technical information about an object.

Question 6

Concepts

Answer 6

Sketches, drawings, and images are used to record and convey specific types of information depending upon the audience and the purpose of the communication.

Question 7

Concepts

Answer 7

Brainstorming many take many forms and is used to generate a large number of innovative, creative ideas in a short time.

Question 8

Essential Questions
What are the advantages and disadvantages to using an isometric pictorial compared to using an oblique pictorial in technical drawings?

Answer 8

The advantages of using an isometric pictorial compared to using an oblique pictorial in a technical drawing is that they are very useful when representing a “3D view.” It is also useful in some aspects of drawings using less views. The only disadvantage is not being able to view the hidden lines based on the complexity of the drawings

Question 9

Essential Questions

What is the difference between a two-dimensional sketch and an isometric sketch?

Answer 9

A 2D sketch purposes is to present the drawing as if it were to be viewed straight on, and is usually drawn onto a flat canvas with only a length and width as dimension. The purpose of an isometric drawing is to offer a three dimensional quality to the sketch, allowing us to view all three or more sides of an object.

Question 10

Essential Questions

Why do designers use tonal shading?

Answer 10

Designers use tonal shading to represent the shadow and light effect on their sketch. Tonal shading gives many references to things such as shape, volume, and texture which gives it more architectural aspect.

Question 11

Essential Question

What is a vanishing point?

Answer 11

Vanishing points is a point in space, usually located on the horizon line, where parallel edges of an object appear to coverage.

Question 12

Essential Question
Aside from the number of vanishing points, what is the difference between a one-point, two-point, and three-point perspective sketch?

Answer 12

The difference between a one point, two point, and three perspective sketch is the main view at which the sketch is viewed. One point perspective is when an object extending into space towards one vanishing point. Two point perspective is an object extending towards two vanishing points. Three point perspective is when all sides of the object are extending towards vanishing points.

Question 13

Essential Question
How does a perspective drawing differ from an isometric drawing of the same object? When would you use a perspective view in lieu of an isometric drawing?

Answer 13

An isometric drawing is drawn to scale, and also gives a 3D representation of an object. A perspective drawing although is not drawn to scale it is drawn towards vanishing points and gives a more realistic view of an object. We would use perspective view in lieu of an isometric drawing when presenting a real world image such as architectural representation.

Question 14

Essential Question

How do you determine the orientation of orthogonal projections in a multi-view drawing?

Answer 14

In a multiple view drawing you could determine its orientation of orthogonal projection by where the drawing is positioned. Such as on an isometric drawing paper where the top, front, back, and sides could be easily located when drawn precisely

Question 15

Essential Question

How would you describe the geometric relationship that exists between the adjacent views of a multi-view drawing?

Answer 15

The geometric relationship exists between the adjacent views of multiple drawing because of the exact dimension that has the adjacent view next to it

Question 16

Essential Question

Why is it important to lay out a multi-view sketch with points and construction lines before drawing object lines?

Answer 16

Points and construction lines help the engineer tell whether or not it is an orthogonal projection or perspective view.

Question 17

Essential Question

What is the purpose of construction lines? Object lines?

Answer 17

The purpose of construction lines is to be used when drafting or in architecture which helps construct other lines, and then is later erased in the sketch. The purpose of an object line is used to define the shape and size of a feature.

Question 18

Essential Question

What is the purpose of hidden lines and center lines?

Answer 18

The purpose of hidden lines is to represent edges that are not directly visible and also to represent surface in an orthographic view. The purpose of center lines are to be used for symmetric objects, and also represent the axes of a circular features.

Question 19

Essential Question

What type of pictorial is shown in the first representation in number 2? How can you tell?

Answer 19

The pictorial shown in the first representation in number two is an oblique sketch. I can tell it is an oblique sketch, because if the horizontal lines kept going that would all have met at one point.

Question 20

Essential Question

What type of pictorial view is shown in number 6? How can you tell?

Answer 20

The type of pictorial view that is shown in number six is a oblique sketch. I can tell it is an oblique sketch, because it is mainly focused on the front view of the object designed

Question 21

Essential Question
Why would building professionals, such as machinists and contractors, prefer multi-view drawings over pictorial drawings?

Answer 21

Building professionals, such as machinists and contractors, prefer multi-view drawings over pictorial drawings because it gives sight of the features and all of their sides.

Question 22

Essential Question

What is a technical sketch? What is an artistic sketch? How are the two similar and how are they different?

Answer 22

A technical sketch must be to scale, accurate, detailed and also have precision of physical objects, With artistic sketching it emphasizes a point and or a concept of nature. The two are similar in a way, because with technical it helps communicate data, and with artistic sketching it shows more of an emotion which helps the two interact.

Question 23

Essential Question

How do you envision applying your sketching skills in other classes?

Answer 23

I envision applying my sketching skills in algebra and geometry.

Question 24

Essential Question

How do you envision applying your sketching skills in college?

Answer 24

I envision applying my sketching skills in college by studying more into engineering

Question 25

Essential Question

How would you teach sketching to a student next year?

Answer 25

Next year I would teach students sketching by taking the time to teach the certain techniques of shading and also the proper use of the top, front, and right view

Question 26

Vocabulary

Answer 26

Cabinet Pictorial
Oblique pictorial where depth is represented as half scale compared to the height and width scale.
Cavalier Pictorial
Oblique pictorial where height, width, and depth are represented at full scale.
Center Line
A line which defines the center of arcs, circles, or symmetrical parts.
Construction Line
lightly drawn lines to guide drawing other lines and shapes.
Depth
The measurement associated with an object’s front­to­back dimension or extent of something from side to side.
Dimension
A measurable extent, such as the three principal dimensions of an object is width, height, and depth.
Dimension Line
A line which represents distance.
Documentation
1. The documents that are required for something or that give evidence or proof of something. 2. Drawings or printed information that contain instructions for assembling, installing, operating, and servicing.
Drawing
A formal graphical representation of an object containing information based on the drawing type.
Edge
The line along which two surfaces of a solid meet.
Ellipse
A regular oval shape, traced by a point moving in a plane so that the sum of its distances from two other points is constant, or resulting when a cone is cut by an oblique plane which does not intersect the base.
Extension Line
Line which represents where a dimension starts and stops.
Freehand
Sketching which is done manually without the aid of instruments such as rulers.

Question 27

Vocabulary

Answer 27

Grid
A network of lines that cross each other to form a series of squares or rectangles.
Height
The measurement associated with an object’s top­to­bottom dimension.
Hidden Line
A line type that represents an edge that is not directly visible.
Isometric Sketch
A form of pictorial sketch in which all three drawing axes form equal angles of 120 degrees with the plane of projection.
Leader Line
Line which indicates dimensions of arcs, circles and detail.
Line
1. A long thin mark on a surface. 2. A continuous extent of length, straight or curved, without breadth or thickness; the trace of a moving point. 3. Long, narrow mark or band.
Line Conventions
Standardization of lines used on technical drawings by line weight and style.
Line Weight
Also called line width. The thickness of a line, characterized as thick or thin.
Long­Break Line
A line which indicates that a very long objects with uniform detail is drawn foreshortened.
Manufacture
To make something, especially on a large scale using machinery.
Measurement
The process of using dimensions, quantity, or capacity by comparison with a standard in order to mark off, apportion, lay out, or establish dimensions.
Multi­View Drawing
A drawing which contains views of an object projected onto two or more orthographic planes.
Object Line
A heavy solid line used on a drawing to represent the outline of an object.
Oblique Sketch
A form of pictorial in which an object is represented as true width and height, but the depth can be any size and drawn at any angle.
Orthographic Projection
A method of representing three­dimensional objects on a plane having only length and breadth. Also referred to as Right Angle Projection.
Perspective Sketch
A form of pictorial sketch in which vanishing points are used to provide the depth and distortion that is seen with the human eye.
Pictorial Sketch
A sketch that shows an object’s height, width, and depth in a single view.
Plane
A flat surface on which a straight line joining any two points would wholly lie.
Point
A location in space.

Question 28

Vocabulary

Answer 28

Profile
An outline of an object when viewed from one side.
Projection Line
An imaginary line that is used to locate or project the corners, edges, and features of a three­dimensional object onto an imaginary two­dimensional surface.
Projection Plane
An imaginary surface between the object and the observer on which the view of the object is projected and drawn.
Proportion
1. The relationship of one thing to another in size, amount, etc. 2. Size or weight relationships among structures or among elements in a single structure.
Scale
1. A straight­edged strip of rigid material marked at regular intervals that is used to measure distances. 2. A proportion between two sets of dimensions used to develop accurate, larger or smaller prototypes, or models.
Section Lines
Thin lines used in a section view to indicate where the cutting plane line has cut through material.
Shading
The representation of light and shade on a sketch or map.
Short­Break Line
Line which shows where part is broken to reveal detail behind the part or to shorten a long continuous part.
Shape
A two­dimensional contour that characterizes an object or area, in contrast to three­dimensional form.
Sketch
A rough representation of the main features of an object or scene and often made as a preliminary study.
Solid
A three­dimensional body or geometric figure.
Technical Working Drawing
A drawing that is used to show the material, size, and shape of a product for manufacturing purposes.
Three­ Dimensional
Having the dimensions of height, width, and depth.
Tone
The general effect of color or of light and shade in a picture.
Two­Dimensional
Having the dimensions of height and width, height and depth, or width and depth only.
Vanishing Point
A vanishing point is a point in space, usually located on the horizon, where parallel edges of an object appear to converge.
View
Colloquial term for views of an object projected onto two or more orthographic planes in a multi­view drawing.
Width
The measurement associated with an object’s side­to­side dimension.