1. What do you understand by geometric entities in relation to CAD? Explain a few of the types in which these entities can be defined. 2. What are the limitations found in the general wireframe...

1. What do you understand by geometric entities in relation to CAD? Explain a few of the types in which these entities can be defined.

2. What are the limitations found in the general wireframe modelling systems? Explain with an ex ample.

3. What is the best kind of a modelling system? Explain with suitable sketches.

4. What are the various three-dimensional construction methods suitable for mechanicalengineering applications?