Drafting Techniques Quiz

Questions and Answers

What is the correct proportion of line widths among THIN, MEDIUM, and THICK lines?

1:4:2

1:2:4 (correct)

1:3:5

1:1:2

Which pencil grade is recommended for drawing THIN lines?

2H grade pencil (correct)

B grade pencil

2B grade pencil

H grade pencil

When using a bow compass, what is its primary purpose?

To draw straight lines

To maintain constant hand pressure

To check the zero setting of the drafter scale

To draw smaller circles or arcs (correct)

What precaution should be taken when moving the drafter scale?

Avoid contact with the drawing sheet Signup and view all the answers

Which statement about the dirt on drawing instruments is true?

It can stain the drawing sheet Signup and view all the answers

What is the purpose of the clamping strap in the setup of the drafter?

To hold the drafter in place while drawing Signup and view all the answers

Which method is recommended for preparing a pencil before drawing?

Removing the wooden shell using a penknife or sharpener Signup and view all the answers

What angles can be drawn using set-squares combined with a T-square?

Angles of 15°, 30°, 45° and so on Signup and view all the answers

Where is the title block typically located on a drawing sheet?

Bottom right corner Signup and view all the answers

What is one recommended tip for achieving good quality drawing?

Sharpen the pencil tip regularly and use appropriate grades Signup and view all the answers

What is the recommended width of each row in the title block commonly used in engineering colleges?

9 mm Signup and view all the answers

What should be avoided during the drawing process for better results?

Frequent use of erasers Signup and view all the answers

To correctly secure the sheet to the board, how should Clip 2 be positioned?

Near the bottom left corner Signup and view all the answers

What should be avoided when dimensioning in technical drawings?

Including redundant dimensions Signup and view all the answers

What is the recommended distance for dimension lines from the object line?

6 – 8 mm Signup and view all the answers

When is it acceptable to place dimensions in a sectioned area?

Leave a blank space for the dimension Signup and view all the answers

What should be done if the space between two extension lines is too narrow?

Replace two arrowheads with a dot above the dimension line Signup and view all the answers

Which of the following methods is suggested for dimension placement when space is limited?

Place the dimension at the end of the extension line Signup and view all the answers

What is the primary application of a continuous thick line in technical drawing?

Visible outlines Signup and view all the answers

What type of line is primarily used for center lines in a drawing?

Chain thin line Signup and view all the answers

Which of the following ratios correctly describes the proportion of long dashes to short dashes in a dashed medium line?

6:1 Signup and view all the answers

What should be avoided when executing lettering in a drawing?

Cursive lettering Signup and view all the answers

Which application is associated with a continuous thin line?

Projection lines Signup and view all the answers

What is the height of letters in a single line required to be?

Uniform across the entire drawing Signup and view all the answers

How should letters be drawn regarding corners?

Rounded off where necessary Signup and view all the answers

What type of line is a cutting plane line typically represented by?

Chain thin, thick at ends Signup and view all the answers

What is the advisable height for titles in pencil drawings according to BIS recommendations?

10 mm Signup and view all the answers

How is the body height of lowercase letters determined?

It is 0.7 times the height of capital letters. Signup and view all the answers

What is the recommended spacing between the numerator and denominator in a fraction?

Equal to three-fourths the height of a non-fractioned number Signup and view all the answers

Which height-to-width ratio is commonly observed in letters?

7:5 Signup and view all the answers

What element is drawn perpendicular to an object line in dimensioning?

Extension line Signup and view all the answers

What must be true about the lines drawn between any two extension lines?

There must be one and only one dimension line. Signup and view all the answers

What is the primary relationship between letter height and line width?

Large letters have more line thickness. Signup and view all the answers

At what angle should inclined letters be sloped from the horizontal?

75° Signup and view all the answers

Study Notes

Setting Up the Drafter

Carry the drafter gently, placing the clamping strap at the top left corner of the board to ensure proper alignment.
Loosen the scale screw to align the 0-degree mark on the degree scale with the scale plate mark.
Align the bottom edge of the sheet with the horizontal scale, using Clip 1 to pivot the sheet as needed.
Fix the sheet's position by adding Clip 2 near the bottom left and Clip 3 near the top right corners.
Secure the top left corner of the sheet with a drawing pin or adhesive tape.

Preparing Drawing Instruments

Use a penknife or sharpener to remove the wooden shell from the unlettered end of the pencil.
Set-squares and T-square are useful for drawing lines at specific angles such as 15°, 30°, and 45°.

Drawing Margins and Title Block

Margins protect drawings from damage at sheet edges.
Title block, located in the bottom right corner, typically contains crucial information and adheres to standard dimensions (9 mm width and 7 mm height for lettering).

Tips for Quality Drawing

Regularly sharpen pencil tips using a penknife or sandpaper.
Use appropriate pencil grades (H, 2H, HB) and minimize eraser use.
Draw lines, circles, or arcs in one stroke, maintaining consistent hand pressure.
Ensure the drafter scale zero setting is checked regularly; prevent rubbing against the drawing sheet during movement.
Ensure cleanliness to avoid stains from instruments and hands.

Lines in Technical Drawing

Lines form the basic elements of drawing and can be classified into thick, medium, and thin categories of varying widths.
The preferred line thickness proportions are 1:2:4, with a recommended group of 0.25 for pencil drawing.
Use harder pencils (H grade) for thick and medium lines and softer pencils (2H) for thin lines.

Line Types and Applications

Continuous Thick Line: Used for visible outlines and object lines.
Continuous Thin Line: Utilized for projection lines, dimension lines, and extension lines.
Dashed Medium Line: Represents hidden lines.
Chain Thin Line: Serves as center lines, with a 6:1 ratio of long to short dashes.
Cutting Plane Line: A chain line, thicker at ends, indicating cuts in the drawing.

Lettering Standards

Lettering should be simple, avoiding artistic styles; symmetrical drawing around vertical or horizontal axes is preferred.
Letters must have uniform heights within a single line, typically using vertical capital letters.

Letter Heights and Ratios

Recommended letter heights from BIS are 1.8 mm to 20 mm, correlating with drawing sizes.
Lowercase letters should maintain a height of 0.7 times that of capital letters, with 0.3 for their tails or stems.
Maintain consistent spacing between letters and words, generally equal to the letter height.

Dimensioning Essentials

Dimensions indicate size and are essential for understanding drawings.
Dimensioning elements include extension lines, dimension lines, leader lines, arrowheads, and dimensions.
Extension lines should start near the object lines, while dimension lines remain parallel and distanced appropriately.
Avoid redundancy by ensuring each dimension appears only once, and avoid dimensioning hidden lines.

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Description

Test your knowledge on essential drafting techniques with this quiz. It covers the proper use of drafter tools, scale settings, and alignment methods. Perfect for students learning drafting skills or professionals brushing up on their techniques.