The following link will provide you to study engineering drawing basics through presentation which is limited to understand the concepts clearly.
Unit 1: Scales, Conic Sections, Cycloid, Involutes, etc.
Unit 2: Projection of Points, Lines and Planes.
Unit 3: Projection of Solids and Sections.
Unit 4: Development and Intersection of Solids.
Unit 5: Isometric and Perspective Projection.
https://drive.google.com/folderview?id=0Bx7BNvoNSOt0WXpnWUNoNHp6dWc&usp=sharing
Unit 1: Scales, Conic Sections, Cycloid, Involutes, etc.
Unit 2: Projection of Points, Lines and Planes.
Unit 3: Projection of Solids and Sections.
Unit 4: Development and Intersection of Solids.
Unit 5: Isometric and Perspective Projection.
https://drive.google.com/folderview?id=0Bx7BNvoNSOt0WXpnWUNoNHp6dWc&usp=sharing