Technical Drawing Standards

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Questions and Answers

Which dimensions correspond to the standard size of an A4 paper?

  • 210x420
  • 300x220
  • 297x594
  • 210x297 (correct)

When an A4 drawing sheet is placed horizontally, where is the title block typically located?

  • Always on the left side
  • Mostly on the left side
  • Anywhere
  • Always on the right side (correct)

Which of the following scales represents an enlargement scale?

  • 1:1
  • 1:2.5
  • 1:5
  • 2:1 (correct)

A 120 mm line is drawn using a 1:2.5 scale. What is the resulting length?

<p>48 mm (B)</p> Signup and view all the answers

An object is drawn at a scale of 5:1. If the length of a line in the drawing is 30 mm, what is the actual length of the line on the object?

<p>6 mm (A)</p> Signup and view all the answers

Which of the following is a standard reduction scale?

<p>1:3 (B)</p> Signup and view all the answers

Which type of line is used to represent the visible edges of an object?

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

Which type of line is used to indicate a cutting plane?

<p>Cutting plane line (D)</p> Signup and view all the answers

What is the purpose of a break line?

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

According to the standards, which of the following letter heights is not a standard?

<p>h = 3.0 mm (C)</p> Signup and view all the answers

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Flashcards

Standard A4 size

210x297

A4 title block position?

Always on the right side.

Enlargement scale

2:1

Drawing a 120mm line at 1:2.5 scale

48mm

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Actual size when drawn in a 5:1 scale

6 mm

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Reduction scale

1:3

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Object lines

Outlines of objects

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Cutting lines

Cutting plane line

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What are break lines?

Free hand lines.

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Letter thickness standard

Ratio of 1/10 h

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Study Notes

  • A4 standard size is 210x297.
  • When an A4 sheet is placed horizontally, the label is generally on the left side.
  • 2:1 is an example of an enlargement scale.
  • A 120 mm line at a scale of 1:2.5 is 48 mm.
  • If an object is drawn at a scale of 5:1 and the line length in the drawing is 30 mm, the actual size is 6 mm.
  • A standard reduction scale is 1:3
  • The line used to draw object lines is a solid, thick line.
  • Cutting lines are dashed lines.
  • Free lines can be used to represent a break in an object.
  • The number "7"is not drawn correctly in accordance to standards, the number requires a line through it.
  • The standard height for letters does not include 2.5 mm.
  • The thickness of lettering should be 1/10 h.
  • The standard height for capital letters is 7/10 h.

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