STC27.
T.G.D guide.
What is T.G.D ?
STC27①
Technical Graphics and Design
 What is T.G.D?
Technical graphics is a way of means of communication using diagrams
or drawings
a) Graphic communication
b) Plan and solid geometry
c) Mechanical engineering
d) Building Drawing
e) Designing process
 Careers related to technical graphics
a) Civil engineer
b) Aircraft engineer
c) Mechanical engineer
d) Town planner
e) Building contract
 Instruments used in T.G.D
1. Set squares
a) 45° set-square
b) 30° 60° set-square
c) Used to draw vertical,oblique and incline lines
2. Compass
a) Used to draw circles and arces
3. Drawing board
a. Used to lose drawing paper while list drawing
What is T.G.D ?
STC27②
4. T-square
Used to draw horizontal lines
5. Protractor
Used to measure degree of angle
6. Divider
Used to transfer measurements
 NB:USE A PENCIL ONLY ,TO WRITE OR TO DRAW ON BOND
PAPER
 Paper sizes
1) A5
2) A⁴∆mainly used
3) A²
4) A¹
5) A0
What is T.G.D ?
STC27③