Table of Contents
Why we have to dimensions our drawing?
The sizes of parts and overall sizes of assemblies are conveyed by dimensions placed on the drawing. The basic objective in dimensioning a drawing is to give the manufacturing or construction personnel the dimensions they need to do their work without requiring them to add, subtract, or estimate distances.
What does it mean for a drawing to be fully dimensioned?
In addition to part dimensions, 2D drawings can describe variations in tolerances throughout the part, surface textures, flatness, material specifications, and many more characteristics that the manufacturer must meet. These are known as fully-dimensioned drawings.
What is the difference between size dimensions and location dimensions?
Size dimensions describe the size of each geometric feature. Location dimensions tell the viewer where edges occur inside an object view.
What are the three types of tolerances that appear on dimensioned drawings?
Three basic tolerances that occur most often on working drawings are: limit dimensions, unilateral, and bilateral tolerances.
Why is it necessary to dimension a sketch what dimensions are needed to fully describe a sketch?
Why is it necessary to dimension a sketch? In order to know the size and location of features.
What is the overall dimension?
overall, overall dimension A total outer dimension of a building material, including any projection, such as a tongue.
What is main use of architectural drawing?
They are widely used by architects and others for a number of purposes: to develop a design idea into a coherent proposal, to communicate ideas and concepts, to convince the clients of the merits of a design, or to make a record of a completed construction project.
What purpose do extension lines serve?
Extension lines continue or extend from the surface of the object and establish the size of the dimension. They do not touch the object lines and extend slightly past the dimension line. Extension lines provide a means of displaying a measurement without placing the dimension on the part.
Why are geometric tolerances used?
Geometrical tolerances are used to convey in a brief and precise manner complete geometrical requirements on engineering drawings. They should always be considered for surfaces which come into contact with other parts, especially when close tolerances are applied to the features concerned.
What are the two systems of placing dimensions on a drawing illustrate your answer with sketches?
Explanation: The two systems of placing dimensions are aligned system and unidirectional system. In the aligned system, the dimension is placed perpendicular to the dimension line. In the unidirectional system, all dimensions are placed such that they can be read from the bottom of the drawing sheet. 2.
What are dimensions in engineering drawing?
A dimension is for size and position (of the designed/modeled shape). A DIMENSION is a numerical value expressed in appropriate units of measurement and used to define the size, location, orientation, form or other geometric characteristics of a part.
What aligned method?
Aligned Method: In this method of dimensioning, it is written in two directions in the whole drawing. It is written upward and at the right side and is read from the bottom and right side of a drawing. Its advantage is this that the dimensions can be written in the horizontal direction which is very easy to write.
How does tolerance shift your attitude towards others?
Many people are surrounded by others who appear to be ‘incompetent’ and ‘annoying’. Understanding tolerance can help shift our attitudes toward others, leading us to a more productive and happy life. Tolerance can be defined as a fair and objective attitude towards those whose lifestyle differs from yours.
Why is unilateral tolerance preferred over bilateral tolerance?
In contrast to bilateral, a unilateral tolerance will allow the deviation to extend from one side of the true profile line or the other. A unilateral tolerance is a type of unequally disposed tolerance and is designated with the letter “U” in a circle in the control frame.
Where should dimension lines be placed?
Dimensions should be given to finished surfaces or between important center lines (not to rough surfaces) wherever possible.
When dimensioning a sketch to create a feature you should Mcq?
When dimensioning a sketch to create a feature, you should: Place as many dimensions as possible on the sketch. Place as many dimensions as possible on the sketch.
What dimensions should write on dimension line?
Dimensions should be written on a drawing, according to one of the following two methods. Only one method should be used on any one drawing. Dimensions should be placed parallel to the dimension lines and preferably near the middle, above and clear off the dimension line (Fig.
What do we mean by dimension?
A dimension is a measurement such as length, width, or height. If you talk about the dimensions of an object or place, you are referring to its size and proportions.
What is location dimension definition?
[lō′kā·shən də′men·chən] (design engineering) A dimension which specifies the position or distance relationship of one feature of an object with respect to another.
Does dimension mean length?
Dimensions – Definition with Examples Dimensions in mathematics are the measure of the size or distance of an object or region or space in one direction. In simpler terms, it is the measurement of the length, width, and height of anything.
What is the importance of technical drawing to architecture?
The drawings give the builder clear guidance on how the building is to be constructed. Technical drawings are a key means of communicating how the architect has translated the client’s vision and for the client to see how that vision works on a practical level.
What is the importance of technical drawing to designers?
Technical drawing is essential for communicating ideas in industry and engineering. To make the drawings easier to understand, people use familiar symbols, perspectives, units of measurement, notation systems, visual styles, and page layout.
What do architects use to draw plans?
Architectural drawing FAQs Many architects use AutoCAD as a 2D drawing tool for creating floor plans, elevations, and sections. This architectural software speeds up the drawing process with pre-built objects like walls, doors, and windows, that behave like real-world objects.
Why do you think alphabet of lines are important in kitchen layout plans?
Technical drawings provide clear and accurate information how an object is to be manufactured. Line symbols used in technical drawing are often referred to as ALPHABET OF LINES. The use of line symbols enables engineers/designers to express the features of designed products clearly and accurately.
What are the lines used in drawing?
Using the Alphabet of Lines Construction Line. This line is used mainly in sketching, which is a freehand drawing technique. Visible Object line. This line is used to draw all the edges of the object. Hidden Object Line. Centre Line (or centreline) Extension Line. Dimension Line.
Which line on a drawing should be the thickest?
2.4.5 Cutting Plane Lines The direction of the cutting line is shown with a line called a cutting plane lineHeavy dashed line that shows a theoretical cut through an object.. This is the thickest line that may appear on a drawing.
What is tolerance and why is it required explain geometric and positional tolerances in detail?
Geometric tolerance regulates the shape, parallelism, tilting, position, run-out, and other factors. Size tolerance drawing. Geometric tolerance drawing. This means that the product should be processed so that the parallelism against the indicated surface (A) should not exceed 0.02.
How do you use geometric tolerance?
Use a general tolerance defined at the bottom of the drawing for all dimensions of the part. Specific tighter or looser tolerances indicated in the drawing will then supersede the general tolerance. Tolerance functional features and their interrelations first, then move on to the rest of the part.
What is meant by geometrical tolerance?
Geometrical Tolerancing is a system that allows tolerances to be applied to features rather than dimensions on engineering drawings and CAD models. It allows different aspects of form, orientation and location to be toleranced independently of each other.
