B.TECH - Semester 6 computer aided design Question Paper 2020 (sep)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- Draw the flowchart for the implementation of a typical CAD process in a CAD/CAM system.
- What are the hardware elements associated with virtual reality (VR) systems?
- Explain the need of CAD neutral file formats. Give any two examples.
- Describe and demonstrate Bresenham's line drawing algorithm.
- Explain the need of homogeneous coordinates in transformations.
- What is clipping? Also list the types of clipping.
- Explain concatenated transformations
- Define principle of minimum potential energy.
- Discuss the advantages and applications of FEM
- Briefly explain isoparametric formulation. PART - B
- (a) Discuss the various data exchange formats and their application in CAD.
- (b) With the help of neat sketches explain constructive solid geometry (CSG) technique.
- (a) Explain with neat diagram the display process for a raster scan display device. Explain how it is different from vector displays
- (b) Explain the concept of wireframe modeling with suitable sketches. Also list the demerits and applications of wireframe models.
- (a) A rectangle has corner co-ordinates $(0,0)(2,0),(2,2)$ and $(0,2)$. This rectangle is rotated by $30^{\circ}$ anticlockwise about
- (i) origin and (ii) about its centroid. Compute the new co-ordinates in both cases.
- (b) Differentiate between CSG and B-REP solid modeling schemes. Give examples of CAD packages which use B-REP as the primary modeling scheme.
- (a) Find the visible portion of a line segment joining the points $\mathrm{P}(70,20)$ and $\mathrm{Q}(100,10)$ by Cohen-Sutherland line-clipping algorithm. The clipping window is defined with the bottom left corner and top right corner as $A(50,10)$ ...
- (b) Discuss any two hidden surface removal algorithms.
- (a) Derive the shape functions for a 1D bar element in natural coordinates.
- (b) A thin steel plate of uniform thickness 25 mm is subjected to a point load of 500 N at mid depth as shown in figure below. The plate is also subjected to self-weight. If Young's modulus $\mathrm{E}=2 \times 10^{5} \mathrm{~N} / \mathrm{mm}^{2}$ a...
- (i) Displacement at each nodal point (ii) Stress in each element (iii) Support reactions
- (a) Discuss in detail the various steps involved in finite element analysis (FEA). State suitable examples of FEA in engineering.
- (b) Differentiate between CST and LST elements. Also derive the interpolation function for a CST element.