Lecture 5: Scale

Question 1

Scale drawing

Answer 1

A drawing that shows a real object with accurate sizes reduced or enlarged by a certain amount.

Question 2

Scale factor

Answer 2

How many times the real object is, compared to the drawing.

Question 3

Metric scale notation

Answer 3

1/N
(1 = paper size, N = actual size)

Question 4

Scale ruler

Answer 4

Tool to interpret size with labels that already reflect the scale

Question 5

Engineer’s scale notation

Answer 5

1” = N
Based on US customary units and 6 systems (10, 20, 30, 40, 50, 60)

Question 6

Inch symbol

Answer 6

”

Question 7

Foot symbol

Answer 7

’

Question 8

Engineer’s scale example

Answer 8

1”=1”
1”=10’
1”=100’
1”=100yd

Question 9

Engineer’s scale ruler

Answer 9

6 division labels (10, 20, 30, 40, 50, 60) that represent the number of divisions in an inch of the scale ruler.

Question 10

How to use an engineer’s scale ruler

Answer 10

1. Identify the correct scale label and corresponding marks.
2. Divide the length of the actual size object by the scale label.
3. Draw the corresponding object’s length with the resulting number of division marks.

Question 11

Architect’s Scale notation

Answer 11

N/M” = 1’ - 0”
(Left = size on paper, right = actual size) Based on US customary units and uses fractions.

Question 12

How to use an architect’s scale ruler

Answer 12

1. Choose an appropriate scale ruler
2. Line up “0” mark with the object & read the “rounded-down” number
3. Line up the rounded-down number with the other end of the object & measure the fractional feet