ORTHOGRAPHIC PROJECTION

Question 1

Is a drawing method that allows someone to represent a threedimensional object on two-dimensions .
Every feature or element which is parallel to the picture plane remains true in size, shape, and configuration.

Answer 1

ORTHOGRAPHIC
PROJECTIONS

Question 2

….. are a collection of 2-D drawings that work together to give an accurate overall representation of an object.

Answer 2

Orthographic Projections

Question 3

what is this appraoch called

Freeze the view from each direction (each
of the six sides of the box) and unfold the
box

Answer 3

GLASS BOX APPROACH

approach

Question 4

….. on an engineering drawing signify more than just the object’s geometry, and it is important that the appropriate type is used.

Answer 4

Lines

Question 5

For most engineering drawings, you will require two thicknesses’, a thick and thin line. The general recommendation is that thick lines are twice as light.

Answer 5

true

Question 6

LINE THICKNESS

Answer 6

• A thick, continuous line is used for visible
  edges and outlines.
• A thin line is used for hatching, leader lines, short centre lines, dimensions and projections.

Question 7

line ….. used to clarify essential features on drawing

Answer 7

styles

Question 8

Line Styles

Answer 8

• Thin chain lines are a standard feature on engineering drawings that indicate centre lines. Centre lines identify the centre of a circle, cylindrical parts, or a line of symmetry.
• Dashed lines are used to show crucial hidden details, for example, wall
  thickness and holes.

Question 9

PRECEDENCE OF LINES

Answer 9

• Visible lines take priority over all
  other lines
  0.6 mm
• Hidden lines and cutting plane lines
  take priority over center lines
  0.3 mm
• Center lines have lowest priority
  0.1 mm

Question 10

A …… drawing should provide all the information necessary for a finished product or part to be manufactured.

Answer 10

dimensioned

Question 11

• Dimensions are always drawn using ….. lines.

Answer 11

continuous thin

Question 12

• Two projection lines indicate where the dimension starts and finishes. Projection lines do not touch the object and are drawn perpendicular to the element you are dimensioning.
• All dimensions less than one should have a leading zero. i.e., .35 should be written as 0.35

Answer 12

t

Question 13

Orthographic drawings can illustrate the depth
of objects by:

Answer 13

1. overlapping feature
2. by using line weight
3. and shading

Question 14

ORTHOGRAPHIC IN ARCHITECTURAL DRAWINGS

»Orthographic drawings include elevations,
plans, and sections, which are drawn in such a
way that the view frame (also known as a
picture plane) is parallel to the object.

Answer 14

t

Question 15

All radial dimensions are proceeded by the …..

Answer 15

capital R

Question 16

what are the

TYPES OF DIMENSIONING

Answer 16

Parallel Dimensioning
Chain Dimensioning
*Combined Dimensions

Question 17

what this type

consists of several dimensions originating from one projection
line.

Answer 17

Parallel Dimensioning

Question 18

A …… uses both chain and parallel dimensioning.

Answer 18

combined dimension