Match each question or statement with the best choice Beside

Match each question or statement with the best choice. \"Besides the starting material, what other feature distinguishes the rapid prototyping technologies?\" What is the common approach used in all of the material addition technologies to prepare the control instructions for the RP system? Three types of starting materials in rapid prototyping? What is rapid prototyping A family of fabrication processes developed to make engineering prototypes in minimum possible lead times based on a computer-aided design (CAD) model of the item. \"(1) liquid, (2) solid, and (3) powders\" The part-build process \"(1) Geometric modeling, which consists of modeling the component on a CAD system to define its enclosed volume; (2) tessellation of the geometric model, in which the CAD model is converted into a format that approximates its surfaces by facets (triangles or polygons); and (3) slicing of the model into layers that approximate the solid geometry.\"

Solution

1.The basic this we do in RP is layering and solidifying . there are different methods to soidify and laying , each mothods give arise to new RP technique . solidifying can be done by laser U.V Lamp

2.To control what we want to generate we have to follow following steps

(a). geometric modeling defining the volume of object with the help of CAD system

(b)tessllation of geometric model , by this step object is converted into triangles and polygons to approximate is surface and distunguish the object\'s inside and outside surfaces

(c) slicing of the 3D model into layer to see how it looks in layers during generating 2D layers .

3. liquid , solid and powder are three matetial

4.Rapid prototyping is fast fabrication process by stacking 2D layers on layer to generate 3D models using CAD . during stacking each layer get bonded to each other and generate 3D model .

RP has many adavntages

(a) fast and accurate .

(b) no need of jigs and fixtures.

(c) minimum material wastage.

(d) good surface finish.

2.