Engineering Graphic Modelling

required

I

structure

form

material

dimension

surface

J

properties

function

1

structure

form

material

dimension

surface

—*

achieved

TYPES OF DRAWING

5.10

GRAPHS (Cartesian co-ordinate system)

Term

Graph,

curve, plot.

Use

For graphically relating two parameters, one being a function

of the

other.

Characteristics

The coordinate axes are calibrated at set intervals. The

calibration is generally linear or logarithmic, and the axes

may be to different scales.

tid

100+

50+

Head MM HG

200 5Ô0 1000 2000 4000

Variation in the polytropic exponent

(from Arbfirl)

t = 0 is the ambient temperature

U0 ML/Min per layer

130

100

77

68

Point of

< h

8

measuremen ...