Question

(8090184) QUESTION 1: INDUCTION 1.1 What is computer-aided design? (3) 1.2 illustrate the layout of drawings in third-angle orthographic projection List the attributes and characteristics of a good draughtsperson. 1.3 (5) [12] QUESTION 2: DRAWING-OFFICE LAYOUT AND EQUIPMENT 2.1 (5) List the steps of a planned and regular maintenance routine which helps prevent the breakdown of drawing office equipment. Name FIVE important reproduction processes used in the drawing department to reproduce a true copy of a drawing. 2.2 (5) [10] QUESTION 3: ENGINEERING MATERIALS AND HEAT TREATMENT 3.1 State THREE characteristics of each the following materials: 3.1.1 Brass 3.1.2 Tin 3.1.3 Vanadium (3x3) (9) 3.2 Briefly explain the term nonferrous alloy. 3.3 (3) State any THREE advantages of the cyanide method. State TWO disadvantages of gas carburising. 3.4 (2) [15]

Mechanical and drawing office orientation

Answer 1

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solutions 1.) Compute Aided Design (CAD) is used for i) Creating the product data base Geometric Modelling 3) Engineering Analysis ) Design Review and Evaluation v) Automated drafting -> We use different types of software to design and computer document a producto design. → It is very useful method of product design and Analysis, since it reduces the time and money. — It is very convinient to use. - It gives detailed to descoiption about any component graphical form. 1.2) Third Angle orthographic projection In third ange projection object is placed in 3rd Quadrent. That is below the honzontal plane and behind the vertical plane. Third angle projection is a method of orthographic projection of 30 design using a series of 20 views in 0 vortical 1st plane 2nd 4th God horizontal plane

- In Bod Angle projection top view l plom view) will be above the object, that is on horizontal plane. front view will be infront of object Left hand side will be on the left side of the object and right hand side will be on the right side of the object. symbol of 3rd Angle projection Third Angle Projection A good CAD draught person should enjoy the designing on computers and creating drawing; He should enjoy exploring and indoostand the program behind the competes sofferse. He must find the practical and innovative solutions to design problems. Personal qualities - He should temas com have computer knowledge and wide knowledge of field of engineering Be confident with numboos." Good team player Good communication skill have normal colour vision. range of soffrore.