Technical Drawing Standards and Practices

Posted on Feb 3, 2025 in Business Administration and Innovation Management

Interpretation Questionnaire 5 Unit Plans

a: Maximum roughness

b: Minimum roughness

c: Oversize machining

d: Direction of stretch marks

f: Basic length

1. Name and Explain the Classification of Standards According to Their Scope

According to its scope:

a. International: They are drafted and issued by international standardization bodies. This group includes standards issued by ISO.

b. Regional: Its scope is usually continental. This applies to the standards issued by the Pan American Standards Commission (COPANT).

c. National: They are drafted and issued by the various national standards bodies, in accordance with the recommendations of relevant international and regional standards. This applies to the standards issued by the INN.

2. Define Format and List Three Advantages of Using a Standardized Format

Format is the sheet of paper or other substance (plant, polyester, etc.) whose size, dimensions, and margins are normalized.

Its advantages are:

  1. Size unification of formats for later archiving.
  2. Subsequent construction of furniture, the size of the standard formats for total use of space.
  3. Facilitate management.
  4. Adapt drawings of the different sizes.
  5. Format reduction is carried out uniformly and the resulting format clarifies the definition of the element fully represented.
  6. Management plans are carried out efficiently and their folding is accomplished without any problems.

3. What Information Must a Label Box Contain?

  1. Identification of the people involved in the development of the drawing.
  2. Name of who reviews.
  3. Name of the part represented.
  4. Company to which the plane belongs.
  5. Material component of the piece.

4. Draw a Representation of a Male and Female Thread

Male thread

Image

Female thread

Image

5. Define and Show a Drawing with the Concepts Used in Tolerance

  • Nominal Measure (N): Is the measure to be achieved.
  • Real Measure: Is affected by errors of machinery, control, or persons involved in its preparation.
  • Maximum Size: It is the largest real dimension we accept as good.
  • Minimum Size: It is the smallest real dimension we accept as good.

Image

6. Define:

  • Plan Set: Representation of a machine or a simple mechanism consisting of a set of pieces.
  • Plan Part: Representation of a single element.
  • Plan of Installation: Representation of a set of parts with graphic indications for placement, to arrange a whole.

7. Define Flowchart

Flowcharts (or spreadsheets) are diagrams using graphic symbols to represent the steps or stages of a process. They can also describe the sequence of different steps or stages and their interaction.

8. Define Cutting Plane

(This section is incomplete in the original document. It should be completed with a definition of a cutting plane.)

9. Name Three Types of Reproduction of Drawings

  1. Reproduction of original paper drawings.
  2. Conversion of paper documents into digital files.
  3. Enlargement and reduction.
  4. Negative copies.

10. Define Sketch and Name Three Characteristics Applied in Technical Drawing

A sketch is the set of projections or views, made in pencil and freehand, properly chosen and interrelated, allowing complete visualization and interpretation of a piece.

Features:

  1. Technically right: To unequivocally submit the object, mark the work. This includes lines and texts.
  2. Aesthetically attractive: Nice to see. Properly distributed over the sheet.
  3. Properly traced: With separate lines following the conventions of technical drawing.
  4. Thorough: Drawn correctly aligned views of the represented objects and labels. Sketch does not mean sloppy.