Chap 4: Scales

Question 1

it can be defined as a ratio of the reduction or enlargement on a map or a drawing

Answer 1

Scale

Question 2

Scales are available in the market for the standardized ratios as recommended by the __________

Answer 2

Bureau of Indian Standards (BIS)

Question 3

The ratio of the length on the drawing to the length of the actual object

Answer 3

Representative Fraction (RF)

Question 4

Formula for RF

Answer 4

RF = length on drawing ÷ length of actual object

Question 5

5 Types of Scales

Answer 5

1. Plain Scales
2. Diagonal Scales
3. Comparative Scales
4. Vernier Scales
5. Scale of Chords

Question 6

Is constructed by dividing a line into a number of equal parts or units and subdividing the first division into a number of equal smaller parts

Answer 6

Plain Scales

Question 7

Used when very small subdivisions are required to be made and plain scales
cannot be drawn accurately.

Answer 7

Diagonal Scales

Question 8

Are prepared instead of diagonal scales when the available space is small and accurate measurements are required to be made according to a very small unit

Answer 8

Vernier Scales

Question 9

Scales drawn with the same RF but graduated to read units in diff erent systems

Answer 9

Comparative Scales

Question 10

Whenever a protractor is not available, this can be used either to measure or to set out angles.

Answer 10

Scale of Chords