Time: 3 Hours; Marks: 70
A. Engineering Drawing (40)
(a) Section of Solids: Concepts of sectioning. Projection of sections of poly-Hedron including their true shapes.
(b) Development of Surfaces: Development of Poly-Hedron and solids of revolution including their sections.
(c) Fasteners: Introduction of temporary and permanent fasteners, riveted joints and welded joints. Types of screw threads, conventional symbols for Internal and External threads, ISI specifications. Drawing of Bolts, Nuts, studs and locking devices. Their application in Engineering field.
(d) Keys and Cotters: Different types of keys, sleeve and cotter joints, socket and spigot joints, knuckle joints.
(e) Couplings: Solid and split coupling, flanged coupling, simple and protected.
B. Workshop Technology (30)
(a) Welding: General characteristics of welded joints, Principle of welding, Types of welding processes and their brief description e.g. gas welding and arc welding, high pressure gas welding and low pressure gas welding. DC welding and AC welding, brief description of resistance welding, spot welding, butt welding, seam welding, submerged arc welding, thermit welding, inert gas welding, tungsten inert gas welding, mig. atomic hydrogen welding.
Gas welding and AC welding tools and equipments, selection of electrodes, fluxes, currents, torches and equipments. Specifications of tools, equipment and materials according to BSI. Different types of flames and their application in welding, Defects in welding and their detection.
(b) Metallic and Non-Metallic Coatings: Necessity of metallic and non-metallic coatings. Principle and processes of electroplating and galvanising, their applications. Properties and uses of varnishes, paints including primers and enamels.
(c) Plastics Technology: Introduction to thermoplastic and thermo-setting plastics, general properties, injection moulding, compression moulding-process and equipment, other plastic moulding methods, Machining plastics.