1 Sign & Symbol Trade related
Alternating Current
Drawing of simple electrical circuit using electrical symbols.
Drawing of sine square & triangular waves.
Diagram of battery charging circuit.
Practice in reading typical example of circuit containing R, L & C.
Reading of electrical drawing.
2 Electronic components
Symbols for electronic components. Diode, Transistor, Zener diode, SCR, UJT, FET, IC,
Diac, Triac, Mosfet, IGBT etc.
Drawing of half wave, Full wave and Bridge rectifier circuit.
Drawing circuit for a single stage Amplifiers and Multi stage Amplifies and types of
signals.
Drawing of circuit containing UJT, FET & Simple power control circuits.
Free hand drawing of Logic gates and circuits.
3 Electric wirings & Earthing
Detailed diagram of calling bell, & Buzzers etc
Free hand sketching of Staircase wiring.
Drawing the schematic diagram of plate and pipe earthing.
Diagram for electroplating from A.C / D.C source.
4 DC machines
Graphic symbols for Rotating machines.
Sketching of brush and brush gear of D.C. machines.
Sketching of D.C. 3-point and 4-point starter .
Layout arrangement of D.C. Generators & motors, control panel.
Exercises on connection to motors through Ammeter, voltmeter & K.W. meters of
electrical wiring diagram.
Drawing the schematic diagram of D.C. motor speed control by Thyristor / DC Drive.
5 Transformer
Graphic symbols for Transformers.
Free hand sketching of transformer and auxiliary parts and sectional views.
Sketching a breather.
Drawing the diagram of typical marking plate of a distribution transformer.
6 Illumination
Free hand sketching of Mercury vapour lamp, sodium vapour lamp, fluorescent tube
(Single & Twine), MHL lamp and their connection
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