main drawing types

Question 1

explain orthographic projection first and third

Answer 1

this is where the drawing is split up into 3 parts the front side and top
first angle projection is front top left left side top right and top bottom left

third angle is front top left right top right and bottom bottom left

Question 2

advantages of orthographic projection

Answer 2

accurate measurements
they can show hidden details
they can show all dimension necessary
they can be annotated to show finishes materia

Question 3

disadvantages of orthographic projection

Answer 3

they represent a single perspective
several views may have to be shown to indicate all detail
does not provide 3d form

Question 4

explain isometric drawing

Answer 4

its a 3d drawing that has a 30 degree angle on both sides

Question 5

advantages of isometric

Answer 5

doesn’t need multiple drawings
easy to illustrate to people
accurate in terms of cale

Question 6

disadvantages of isometric

Answer 6

causes distortion
not useful for circles

Question 7

explain oblique projection

Answer 7

this is a 3d form of a drawing that is on a 45 angle tilt this can be shown as cavalier which shows the full length and cabinet which is drawn half the length it says.

Question 8

oblique projection advantages

Answer 8

presents the exact shape of one face of the object

Question 9

oblique projection disadvantages

Answer 9

distorted appearance

Question 10

exploded drawing advantages

Answer 10

useful for showing the relations between parts

Question 11

disadvantages of exploded drawings

Answer 11

false impression of how easy it is to assemble

Question 12

section drawings advantages and disadvantages

Answer 12

shows inside for hidden detail

limited to what you can see

Question 13

explain detailed drawing

Answer 13

single component precise description of parts

Question 14

explain breakout drawings

Answer 14

puts a hole on the drawing so you can look inside the machine

Question 15

explain auxiliary drawing

Answer 15

gets the true surface are of the drawing

Question 16

benefits to consider for pictorial drawings in general

Answer 16

speed of production visual impact

Question 17

limitations to consider for pictorial drawing in general

Answer 17

lengths and shapes not true not prodcued to a recognised standard dimensions difficult to read

Question 18

consequences of interpretation errors

Answer 18

incorrect manufacture
incorrect assembly
cost to scrap