syllabi 10+1 voc streams - Government Senior Secondary School ...

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Coping, Parapet, drip course Line Gola, Terrace, Carnice, slab, R.C.C. lintel, R.C.C. chhajja,
string course, plinth level, D.P.C., Footing, Offset, Foundation blocks, Basement, Groundfloor, 1st
floor, 2nd floor, third floor, fourth floor.
(iv) MECHANICAL SERVICING (Genl.)
SYLLABUS
Paper-I LATHE MACHINE AND OPERATIONS
Time : 2 hrs. THEORY Marks : 30
Semester-I Int. Ass./CCE:10
Total Marks: 40
1. INTRODUCTION TO BASICS :
Simple sketches of mechanical hand tools. Brief description of machine tools and equipments.
Different types of operations by different types of machine tools (only name and diagrams).
Safety precautions in using machine tools.
2. INTRODUCTION TO LATHE :
Lathe, centre lathe, General purpose lathe machine, Types of lathe machine. Specification of lathe
machine, safety rules of the workshop. Principle of Lathe.
3. LATHE MACHINE PARTS :
Study of various lathe parts and sub assemblies of the lathe & their functions, Accessories viz.
Lathe centers, face plate, dressing plate, angle plate, three jaw chuck, four jaw chuck, collect,
mondrel, steady rest, moving rest, Tail stock, taper turning attachments. Description of the
above accessories giving their sketches.
SEMESTER-II
Time: 2 hrs THEORY Marks: 30
Int. Ass./CCE: 15
Total Marks: 45
1. CUTTING TOOLS :
Cutting tools geometry of single point cutting tool, various angles and their values for cutting
different metal jobs, Classification, types of cutting tools. Special purpose tools viz. facing
tool,parting off tool, threading tool. Boring tool, knurling tool, Tool material, classification,
composition, properties and application of High carbon steel, High speed steel, carbide, ceramic and
diamond.
2. LATHE MACHINE TERMINOLOGY
Taper, Taperturning, use of taper, Explanation of taper, Calculations for taper, conicity : Speed,
Feed, Depth of cut.
3 LATHE OPERATIONS :
Centring, Simple Turning, Stepturning, Facing, Drilling, Boring, Tapering, knurling, Parting off
Taper, chamfering, Finishing.
4. CALCULATIONS FOR THREAD CUTTING :
Explanation of simple gear train and compound gear train. Calculation for change wheels
meterics thread on English lead screw. Cutting multiple threads. Brief description with dies
feed gear box.
5. TURRET AND CAPSTAN LATHES
Difference between centre, capston and turret lathes. Specifications scope and applications of
turret and capston lathe in production shop. Machine details such as head stock, work holding
devices, turret head, stops and trips, tools and equipments, turret and capston lathe accessories,
tool layout operations